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Back to the Profile Refereed Journals: Horter D, Chang C-C, Pogranichnyy R, Zimmerman JJ, Yoon K-J. 2001. Persistence of porcine reproductive and respiratory syndrome virus in pigs. Adv Exp Med Biol 494:91-94. Wagstrom EA, Chang C-C, Yoon K-J, Zimmerman JJ. 2000. Shedding of porcine reproductive and respiratory syndrome (PRRS) virus in mammary secretions of sows. Am J Vet Res 62:1876-1880. Hurd HS, Bush EJ, Losinger W, Corso B, Zimmerman J, Wills R, Swenson S, Pyburn D, Yeske P, Burkgren T. 2001. Outbreaks of porcine reproductive failure: Report on a collaborative field investigation. Journal of Swine Health and Production 9(3):103-108. Wagstrom EA, Yoon K-J, Zimmerman JJ. 2000. Immune components in porcine mammary secretions. Viral Immunol 13:383-397. Zimmerman J, Chang C-C, Horter D, Yoon K-J. 2000. Control of porcine reproductive and respiratory syndrome: The challenge of identifying carrier animals. Vet Res 31:91. Yang L, Frey ML, Yoon K-J, Zimmerman JJ, Platt KB. 2000. Categorization of North American porcine reproductive and respiratory syndrome viruses: Epitopic profiles of the N, M, GP5, and GP3 proteins and susceptibility to neutralization. Arch Virol 1451599-1619. Pogranichnyy R, Yoon K-J, Harms P, Swenson S, Zimmerman J, Sorden S. 2000. Characterization of immune response of young pigs to porcine circovirus type 2 infection. Viral Immunol 13:143-153. Wills RW, Gray JT, Fedorka-Cray PJ, Yoon K-J, Ladely S, Zimmerman J. 2000. Synergism between porcine reproductive and respiratory syndrome virus (PRRSV) and Salmonella choleraesuis in swine. Vet Microbiol 71:177-192. Wagstrom EA, Yoon K-J, Zimmerman JJ. 2000. Diagnostic performance of a reverse transcription-polymerase chain reaction test for porcine reproductive and respiratory syndrome virus. J Vet Diagn Invest 12:75-78. Yoon K-J, Zimmerman JJ, Chang C-C, Cancel-Tredo S, McGinley MJ. 1999. Effect of challenge dose and route on porcine reproductive and respiratory syndrome virus (PRRSV) infection in young swine. Vet Res 30:629-638. Roghmann M-C, Faulkner CT, Lefkowitz A, Patton S, Zimmerman J, Morris Jr, JG. 1999. Decreased seroprevalence for Toxoplasma gondi in Seventh Day Adventists in Maryland. Am J Trop Med Hyg 60:790-792 Yang L, Yoon K-J, Li Y, Lee J-H, Zimmerman JJ, Frey ML, Harmon KM, Platt KB. 1999. Antigenic and genetic variations of the 15 kD nucleocapsid protein of porcine reproductive and respiratory syndrome virus isolates. Arch Virol 144:526-546. Hill RE, Zimmerman JJ, Wills RW, Patton S, Clark WR. 1998. Seroprevalence of antibodies against Toxoplasma gondii in free-ranging mammals from Iowa, USA. J Wildlife Dis 34(4):811-815. Sornsen SA, Zimmerman JJ, Roof MB. 1998. Effect of various stocking methods and extra-label PRRS vaccination on average daily gain. Journal of Swine Health and Production 6(1):7-11. Sornsen SA, Zimmerman JJ, Polson DD, Roof MB. 1998. Effect of PRRS vaccination on average daily gain: a comparison of intranasal and intranasal-intramuscular administration. Journal of Swine Health and Production 6(1):13-19. Sur J-H, Doster AR, Christian JS, Galeota JA, Wills RW, Zimmerman JJ, Osorio FA. 1997. Porcine reproductive and respiratory syndrome virus replicates in testicular germ cells, alters spermatogenesis, and induces germ cell death by apoptosis. J Virol 71:9170-9179. Wills RW, Zimmerman JJ, Swenson SL, Yoon K-J, Hill HT, Bundy DS, McGinley MJ. 1997. Transmission of porcine reproductive and respiratory syndrome virus by direct, close, or indirect contact. Journal of Swine Health and Production 5(6):213-218. Wills RW, Zimmerman JJ, Yoon K-J, Swenson SL, Hill HT, Bundy DS, Hoffman LJ, McGinley MJ, Hill HT, Platt KB. 1997. Porcine reproductive and respiratory syndrome virus: routes of excretion. Vet Microbiol 57:69-81. Kinker D, Swenson S, Wu L-L, Zimmerman J. 1997. Evaluation of serological tests for the detection of pseudorabies gI antibodies during early infection. Vet Microbiol 55:99-106. Zimmerman J, Yoon K-J, Wills RW, Swenson SL. 1997. General overview of PRRSV: A perspective from the United States. Vet Microbiol 55:187-196. Yoon K-J, Wu L-L, Zimmerman J, Platt KB. 1997. Field isolates of porcine reproductive and respiratory syndrome virus (PRRSV) vary in their susceptibility to antibody dependent enhancement (ADE) of infection. Vet Microbiol 55:277-287. Wills R, Zimmerman J, Yoon K-J, Swenson S, McGinley M, Hill H, Platt K, Christopher-Hennings J, Nelson E. 1997. Porcine reproductive and respiratory syndrome virus - a persistent infection. Vet Microbiol 55:231-240. Zimmerman J, Yoon K-J, Pirtle EC, Wills R, Sanderson T, McGinley M. 1997. Studies of porcine reproductive and respiratory syndrome (PRRS) virus in avian species. Vet Microbiol 55.329-336. Patton S, Zimmerman J, Roberts T, Faulkner CT, Diderrich VR, Assadi-Rad A, Davies P, Kliebenstein J. 1996. Seroprevalence of Toxoplasma gondii in hogs in the National Animal Health Monitoring System (NAHMS). J Eukaryotic Microbiol 43(5):121S. Yoon K-J, Wu L-L, Zimmerman JJ, Hill HT, Platt KB. 1996. Antibody dependent enhancement (ADE) of porcine reproductive and respiratory syndrome virus (PRRSV) infection in pigs. Viral Immunol9:51-63. Yoon K-J, Henry SC, Zimmerman JJ, Platt KB. 1996. Isolation of porcine cytomegalovirus (PCMV) from a swine herd with PRRS. Vet Med 91(8):779-784. Christopher-Hennings J, Nelson EA, Nelson JK, Hines RJ, Swenson SL, Hill HT, Zimmerman JJ, Katz JB, Yaeger MJ, Chase CCL, Benfield DA. 1995. Detection of PRRSV in boar semen using the polymerase chain reaction. J Clin Microbiol 33:1730-1734. Swenson SL, Zimmerman J, Landgraf J, Frey ML, Brevik A, Hill HT, McGinley MJ. 1995. Effect of dexamethasone treatment on PRRS virus isolation and serum antibody titers in convalescent swine. Journal of Swine Health and Production 3(6):248-250. Swenson SL, Hill HT, Zimmerman JJ, Evans LE, Wills RW, Yoon K-J, Schwartz KJ, Althouse GC, McGinley MJ, Brevik AK. 1995. Preliminary assessment of an inactivated PRRS virus vaccine on the excretion of virus in semen. Journal of Swine Health and Production 3(6):244-247. Christopher-Hennings J, Nelson EA, Hines RJ, Nelson JK, Swenson SL, Zimmerman JJ, Chase CCL, Yaeger MJ, Benfield DA. 1995. Persistence of porcine reproductive and respiratory syndrome virus in serum and semen of adult boars. J Vet Diagn Invest 7: 456-464. Yoon K-J, Zimmerman JJ, McGinley MJ, Landgraf J, Frey ML, Hill HT, Platt KB. 1995. Failure to consider the antigenic diversity of porcine reproductive and respiratory syndrome (PRRS) virus isolates may lead to misdiagnosis. J Vet Diagn Invest 7:386-387. Yoon K-J, Zimmerman JJ, Swenson SL, McGinley MJ, Eernisse KE, Brevik A, Rhinehart LL, Frey ML, Hill HT, Platt KB. 1995. Characterization of the humoral immune response to porcine reproductive and respiratory syndrome (PRRS) virus infection. J Vet Diagn Invest 7:305-312. Swenson SL, Hill HT, Zimmerman JJ, Evans LE, Wills RW, Yoon K-J, Schwartz KJ, Althouse GC, McGinley MJ, Brevik AK. 1994. Artificial insemination of gilts with porcine reproductive and respiratory syndrome (PRRS) virus-contaminated semen. Journal of Swine Health and Production 2(6):19-23. Swenson SL, Hill HT, Zimmerman J, Evans LE, Landgraf JG, Wills RW, Sanderson TP, McGinley MJ, Brevik A, Ciszewski DK, Frey ML. 1994. Excretion of porcine reproductive and respiratory syndrome (PRRS) virus in semen after experimental infection in boars. J Am Vet Med Assoc 204:1943-1948. Zimmerman JJ, Hill RE Jr., Smith KE, Kneeland BL, Platt KB, Hill HT, Beran GW, Clark WR, Miller LD. 1994. Encephalomyocarditis virus infection in raccoons (Procyon lotor). J Zoo Wildl Med 25:233-239. Oren SL, Swenson SL, Kinker DR, Hill HT, Hu H-L, Zimmerman J. 1993. Evaluation of serological pseudorabies tests for the detection of antibodies during early infection. J Vet Diagn Invest 5:529-533. Zimmerman J, Schwartz K, Hill HT, Meetz MC, Simonson R, Carlson JH. 1993. Influence of dose and route on transmission of encephalomyocarditis virus to swine. J Vet Diagn Invest 5:317-321. Meng X-J, Paul PS, Vaughn EM, Zimmerman JJ. 1993. Development of a radiolabeled nucleic acid probe for the detection of encephalomyocarditis virus of swine. J Vet Diagn Invest 5:254-258. Smith KE, Zimmerman JJ, Beran GW, Hill HT, Bolin C. 1992. A survey of house mice (Mus musculus) from Iowa swine farms for infection with Leptospira interrogans serovar bratislava. Can Vet J 33:742-744. Smith KE, Zimmerman JJ, Beran GW, Hill HT. 1992. A serosurvey of swine and free-living species on Iowa farms for antibodies against encephalomyocarditis virus. Can Vet J 33:645-649. Smith KE, Zimmerman JJ, Beran GW, Hill HT, Patton S. 1992. The epidemiology of toxoplasmosis on Iowa swine farms with an emphasis on the roles of free-living mammals. Vet Parasitol 42:199-211. Zimmerman JJ, Owen WJ, Hill HT, Beran GW. 1991. Seroprevalence of antibodies against encephalomyocarditis virus in swine of Iowa. J Am Vet Med Assoc 199:1737-1741. Hill RE, Zimmerman JJ, Greve JH, Beran GW. 1991. Use of ivermectin against several nematodes in naturally infected raccoons (Procyon lotor). J Zoo Wildl Med 22:417-420. Mengeling WL, Lager KM, Zimmerman JJ, Samarikermani N, Beran GW. 1991. A current assessment of the role of porcine parvovirus as a cause of fetal porcine death. J Vet Diagn Invest 3:33-35. Zimmerman JJ, Hill HT, Beran GW, Meetz MC. 1990. Serologic diagnosis of encephalomyocarditis virus infection in swine by the microtitration serum neutralization test. J Vet Diagn Invest 2:347-350. Schoenbaum MA, Zimmerman JJ, Beran GW, Murphy DP. 1990. Survival of pseudorabies virus in aerosol. Am J Vet Res 51:331-333. Bryan M, Zimmerman JJ, Berry WJ. 1990. The use of half-lifes and associated confidence intervals in biological research. Vet Res Comm 14:235-240. Zimmerman JJ, Dreesen DW, Owen WJ, Beran GW. 1990. Prevalence of toxoplasmosis in Iowa swine. J Am Vet Med Assoc 196:266-270. Zimmerman JJ, Berry WJ, Beran GW, Murphy DP. 1989. Influence of temperature and age on the recovery of pseudorabies (Aujeszky's disease) virus from house flies (Musca domestica). Am J Vet Res 50:1471-1474. Zimmerman JJ, Hallam JA, Beran GW. 1989. The cost of eliminating pseudorabies from swine herds in Iowa. Prev Vet Med 7:187-199. Books and Book Chapters: Antonio Morilla Gonzalez, Pablo Hernandez-Jauregui, Kyoung-Jin Yoon, Jeff Zimmerman (eds). Emerging and Re-Emerging Viral Diseases of Swine. Iowa State University Press, Ames, Iowa (in preparation). Zimmerman JJ, Hill RE. 2001. An overview of epidemiologic and regulatory aspects of viral diseases. In: P Paul, D Reynolds, eds. A Practical Textbook of Veterinary Virology. Iowa State University Press, Ames, Iowa (in press). Zimmerman JJ. 2000. Una breve histoia del Cólera Porcino (Fiebre Porcina Clásica) y su erradicación en los Estados Unidos de Norteamérica. In: Morilla González A (ed). La Fiebre Porcina Clásica en las Américas. Published by Instituto Interamericao de Cooperación para la Agricultura y el Comité para el Fomento y Protección Pecuaria del Estado de Puebla, S.C. (ISBN 970-91197-6-1) pp. 91-102. Benfield DA, Collins JE, Dee SA, Halbur, PG, Joo HS, Lager KM, Mengeling WL, Murtaugh MP, Rossow KD, Stevenson GW, Zimmerman JJ. 1999. Porcine reproductive and respiratory syndrome. In: Straw BE, D'Allaire S, Mengeling WL, Taylor DJ (eds). Diseases of Swine (8th ed). Iowa State University Press, Ames Iowa, pp 201-232. Zimmerman J, Yoon K-J. 1998. Sindrome Disgenésico y Respiratorio del Cerdo. In: Contreras Hernández ML, Rodriguez Serralde R, Rivera Vergara OE (eds). Sistema de Producción Animal I: Cerdos. Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia, División Sistema Universidad Abierta y Educación a Distancia, pp. 65-77. Zimmerman JJ, Yoon K-J, Stevenson G, Dee SA. 1998. The 1998 Porcine Reproductive and Respiratory Syndrome Compendium: A comprehensive reference on PRRS for pork producers, veterinary practitioners, and researchers. National Pork Producers Council in cooperation with the National Pork Board, Des Moines IA. 128 pages. Zimmerman JJ. 1994. Encephalomyocarditis. In: GW Beran, JH Steele, eds. Handbook of Zoonoses. 2nd edition. CRC Press, Inc., Boca Raton, Florida, pp 423-436. Hallam JA, Zimmerman JJ, Beran GW. 1987. The cost of eliminating pseudorabies from swine herds in Iowa on an area basis. In: EC Mather and JB Kaneene, eds. Economics of Animal Diseases. Michigan State University, East Lansing, Michigan, pp 277-283. Proceedings and Abstracts: Zimmerman J, Yoon K-J, Horter D. March, 2000. PCR performance and sample selection. The State of the Art of PRRS Diagnostics. Proceedings, Workshop #11, pp. 13-14. 32nd Ann Meeting of the American Association of Swine Veterinarians. Horter DC, Pogranichnyy R, Chang C-C, Yoon K-J, Zimmerman J. November, 2000. Evaluation of diagnostics for detecting PRRSV carriers. Proc 81st Ann Meet Conference of Research Workers in Animal Diseases, #141. Chang C-C, Harmon K, Zimmerman J, Yoon K-J. November, 2000. Genotypic and phenotypic changes of PRRS virui in persistently infected pigs. Proc 81st Ann Meet Conference of Research Workers in Animal Diseases, #135. Zimmerman J. December 2000. Overview of PRRS virus serology. Memorias del Congresso: IX Día del Porcicultor 2000. Asociación de Médicos Veterinarios Zootecnistas Especialistas en Ciencias Porcicolas del Sur de Sonora A.C., pp. 117-121. Horter D, Pogranichnyy R, Chang CC, Yoon K-J, Zimmerman JJ. October 2000. Evaluation of PRRS diagnostics in detecting persistently infected PRRSV carriers. Abstracts, 43rd Ann Meet American Assoc Vet Lab Diagnosticians, p. 92. Pogranichnyy R, Harms P, Sorden S, Zimmerman JJ, Yoon K-J. October 2000. Role of porcine circovirus type 2 in postweaning multisystemic wasting syndrome of pigs. Abstracts, 43rd Ann Meet American Assoc Vet Lab Diagnosticians, p. 3. Zimmerman J, Horter D, Pogranichnyy R, Chang CC, Harmon K, Yoon K-J. September 2000. Diagnostics for PRRS virus carrier animals. Proc 118th Annual Meeting of the Iowa Veterinary Medical Association, pp. 47-49. Horter DC, Pogranichnyy RM, Chang C-C, Yoon K-J, Zimmerman JJ. September 2000. Persistence of porcine reproductive and respiratory syndrome virus. 35th US-Japan Cooperative Program in Natural Resources, Panel of Animal and Avian Health Meeting (no page numbers). Zimmerman J, Chang C-C, Horter D, Pogranichnyy R, Yoon K-J. August 2000. Epidemiology of PRRS virus. Proceedings, Workshop of Swine Disease Management sponsored by the Pig Research Institute of Taiwan and the American Soybean Association, pp 1-14. Pogranichnyy RM, Yoon K-J, Harmon KM, Zimmerman JJ, Horter D, Wagstrom EA. July 2000. Validation and assessment of diagnostic performance of PCDR-based assays for detecting porcine reproductive and respiratory syndrome (PRRS) virus and porcine circovirus (PCV). Abstracts, 2nd International Course on Advanced Methods for Test Validation and Interpretation in Veterinary Medicine, Freie University of Berlin Germany, p. 98. Horter D, Pogranichnyy R, Chang C-C, Yoon K-J, Zimmerman JJ. July, 2000. Evaluation of PRRS diagnostics in detecting persistently infected PRRSV carriers. Proc 39th North Central Conf Vet Lab Diagnosticians (unnumbered). Zimmerman J, Yoon K-J, Horter D, Harmon K, Pogranichnyy R, Chang C-C. July 2000. PRRS virus carrier animals. Memorias del XXXV Congreso Nacional, Asociación Mexicana de Veterinarios Especialistas en Cerdos, pp 17-19. Horter D, Pogranichnyy R, Chang C-C, Yoon K-J, Zimmerman JJ. June, 2000. Persistence of porcine reproductive and respiratory syndrome virus in pigs. Proc 12th International Syposium on Nidoviruses (in press). Horter D, Pogranichnyy R, Chang C-C, Yoon K-J, Zimmerman J. March, 2000. How long does PRRS virus persist in pigs after infection? Proc Am Assoc Swine Pract, pp 401. Zimmerman J. March, 2000. A brief review of basic concepts in test performance. Proc Am Assoc Swine Pract, pp 459-463. Pogranichnyy R, Swenson S, Zimmerman J, Yoon K-J. Characterization of immune response of young pigs to porcine circovirus (PCV) type 2 infection. November, 1999. Abstracts 80th Ann Meet Conference of Research Workers in Animal Diseases, #222. Horter DC, Pogranichnyy RM, Chang C-C, Yoon K-JH, Zimmerman JJ. Estimating the rate of PRSSV carriers in an experimental population. November, 1999. Abstracts 80th Ann Meet Conference of Research Workers in Animal Disease, #177. Pogranichnyy R, Harms P, Swenson S, Zimmerman J, Sorden S, Yoon K-J. October, 1999. Clinical and immune respoonses in young swine to porcine circovirus type II infection. Abstracts 42nd Ann Meet American Assoc Vet Lab Diagnosticians, p 3. Pogranichnyy R, Harms P, Swenson S, Zimmerman J, Sorden S, Yoon K-J. September, 1999. Experimental porcine circovirus type II infection in young pigs. Allen D. Leman Swine Conference Research Abstracts 26 (Suppl):1. Horter D, Pogranichnyy R, Chang C-C, Yoon K-J, Zimmerman JJ. September, 1999. Persistence of PRRS virus in pigs. Allen D. Leman Swine Conference Research Abstracts 26 (Suppl):27. Zimmerman JJ, Chang CC, Horter D, Yoon K-J. September, 1999. Update on diagnostic technology: PRRSV PCR and the challenge of identifying carrier animals. Proc 117th Annual Meeting of the Iowa Veterinary Medical Association, p 45. Zimmerman JJ, Chang CC, Yoon KJ. June, 1999. Control of PRRS virus and the challenge of identifying carrier animals. Proc 3rd International Symposium on Porcine Reproductive and Respiratory Syndrome (PRRS), p 233. Zimmerman J. March, 1999. What we know about persistent infection with respect to the epidemiology of PRRS virus. Proc Am Assoc Swine Pract, pp 311-312. Yoon K-J, Zimmerman J. November, 1998. Possible role of infectious agents in early infertility. Proc Swine Disease Conf Swine Pract, p. 23. Wagstrom EA, Yoon K-J, Zimmerman JJ. September, 1998. Diagnostic and analytical performance of a RT-PCR test for the detection of PRRS virus in serum. Allen D. Leman Swine Conference Research Abstracts 25 (Suppl):49-50. Wagstrom EA, Yoon K-J, Zimmerman JJ. October, 1998. Diagnostic performance of a RT-PCR for the detection of PRRS virus in serum. Abstracts 41st Ann Meet American Assoc Vet Lab Diagnosticians, p 25. Zimmerman J. June, 1998. Toxoplasmosis - what is it and what is the role of pork? Proc Pork Quality and Safety Summit, pp 208-211. Yoon K-J, Zimmerman JJ, Chang C-C, Harmon KM, Reitz P, McGinley M. July, 1998. Estimation of the minimum infectious dose for PRRS virus by intranasal and intramuscular routes. Proc 15th Internat Pig Vet Soc Congress, 2:129. Yoon K-J, Anderson MS, Zimmerman JJ. July, 1998. Assessing the significance of porcine cytomegalovirus in respiratory disease of young swine. Proc 15th Internat Pig Vet Soc Congress, 2:173. Wagstrom EA, Chang CC, Yoon K-J, Zimmerman JJ. July, 1998. Evaluation of shedding of porcine reproductive and respiratory syndrome (PRRS) virus in mammary secretions of sows in commercial swine units. Proc 15th Internat Pig Vet Soc Congress, 2:98. Senn MK, Yoon K-J, Zimmerman JJ, Pogranichnyy RM, Reitz PJ, Thacker BJ. July, 1998. Characterization of porcine reproductive and respiratory syndrome virus antibody levels in neonatal swine nursing immune dams. Proc 15th Internat Pig Vet Soc Congress, 2:130. Wagstrom EA, Yoon K-J, Zimmerman JJ. June, 1998. Diagnostic sensitivity and specificity of a RT-PCR test for the detection of PRRS virus in serum. Proc North Central Conference of Veterinary Laboratory Diagnosticians, (unnumbered pages). Zimmerman J, Yoon K-J, Stevenson G, Dee SA. June, 1998. PRRS - what do we know? Proc 1998 Pork Academy, pp 142-161. Wagstrom EA, Chang CC, Yoon K-J, Zimmerman J. March, 1998. Excretion of PRRS virus in milk and colostrum. Proc Am Assoc Swine Pract, pp 405-406. Yoon K-J, Zimmerman J, Chang CC, Harmon K. March, 1998. Effect of challenge dose and route on PRRS virus infection in young swine. Proc Am Assoc Swine Pract, p 407. Hurd HS, Bush E, Connor J, Collins J, Epperson B, Gomez T, Kolb J, Lautner B, McCaw M, McKean J, Schmitt B, Schoenbaum M, Terrill M, Wills R, White L, Zimmerman J. 1998. The acute PRRS investigative study - an update. Proc Am Assoc Swine Pract, pp 419-421. Zimmerman J, Yoon K-J. January, 1998. Síndrome disgenésico y respiratorio del cerdo. Symposium sobre el manejo del síndrome disgenésico y respiratorio del cerdo (PRRS). Fundación Guanajuato Produce y el Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias (INIFAP). León Guanajuato, México (unnumbered pages). Sur J-H, Doster AR, Christian JS, Galeota JA, Wills RW, Zimmerman JJ, Osorio FA. November, 1997. PRRSV replication in testicular germ cells. Abstracts 78th Ann Meet Conference of Research Workers in Animal Disease, #217. Wagstrom EA, Chang CC, Yoon K-J, Zimmerman JJ. November, 1997. Porcine reproductive and respiratory syndrome virus in mammary secretions. Abstracts 78th Ann Meet Conference of Research Workers in Animal Disease, #199. Yang L, Yoon K-J, Zimmerman JJ, Platt KB November, 1997. Production of monoclonal antibodies specific for the 25 kD native envelope protein of porcine reproductive and respiratory syndrome virus. Abstracts 78th Ann Meet Conference of Research Workers in Animal Disease, #197. Wagstrom EA, Chang CC, Yoon K-J, Zimmerman JJ. October, 1997. Evaluating PRRS virus transmission in colostrum and milk. Proc Swine Disease Conf Swine Pract. Iowa State University, pp 109-110. Platt KB, Yoon K-J, Zimmerman JJ. October, 1997. Susceptibility of swine to Hepatitis E virus and its significance to human health. Proc Ann Meet Food Safety Consortium, pp 216-219. Wagstrom EA, Chang CC, Yoon K-J, Zimmerman JJ. September, 1997. PRRS virus in mammary secretions. Research Abstracts, Allen D. Leman Swine Conference, 24 (Suppl):3. Anderson M, Yoon K-J, Zimmerman J. August, 1997. Assessing the role of porcine cytomegalovirus in respiratory disease in young pigs: a field-based study. Proc Merck Vet Scholars Program, p 15. Zimmerman JJ, Yoon K-J. August, 1997. Síndrome disgenésico y respiratorio del cerdo. Memorias del XXXII Congreso Nacional, Asociación Mexicana de Veterinarios Especialistas en Cerdos, pp 55-56. Klliebenstein J, Patton S, Zimmerman J, Hu X, Hallam A, Roberts T, Bush E. July, 1997. Toxoplasma gondii in United States swine operations: an assessment of management factors. Proc VIIth Internat Symp Vet Epidemiol Econ published in Epidemiol Santé Anim 31-32:05.26.1-05:26.3. Sur JH, Doster AR, Christian S, Galeota JA, Wills RW, Zimmerman JJ, Osorio FA. July, 1997. Evidence of the tropism of porcine reproductive and respiratory syndrome virus for testicular germ cells of boars. Proc North Central Conference of Veterinary Laboratory Diagnosticians, p 6. Stabel TJ, Fedorka-Cray PJ, Gray JT, Wills RW, Yoon K-J, Zimmerman JJ. May, 1997. Porcine Interferon-g levels in serum after infection with Salmonella choleraesuis and porcine reproductive and respiratory syndrome virus. Proc Ann Meet Am Soc Microbiol, Abstr # B-94. Wills RW, Fedorka-Cray PJ, Yoon K-J, Gray JT, Stabel T, Zimmerman J. March, 1997. Synergism between porcine reproductive and respiratory syndrome virus and Salmonella choleraesuis. Proc Am Assoc Swine Pract, pp 459-462. Zimmerman JJ, Yoon K-J. February, 1997. Síndrome disgenésico y respiratorio del cerdo. Proc Tercer Ciclo de Conferencias, Asociación Mexicana de Veterinarios Especialistas en Cerdos de los Altos de Jalisco, (no page numbers). Wills RW, Fedorka-Cray PJ, Yoon K-J, Gray JT, Stabel T, Zimmerman JJ. January, 1997. Synergism between porcine reproductive and respiratory syndrome (PRRS) and Salmonella choleraesuis. Nebraska Veterinary Medical Association 1997 Convention Proceedings, pp 137-140. Zimmerman JJ. December, 1996. Transmission of porcine reproductive and respiratory syndrome virus. Proc Swine Health Summit: National Pork Producers Council and National Pork Board, pp 53-57. Wills RW, Fedorka-Cray PJ, Yoon K-J, Gray JT, Stabel T, Zimmerman JJ. November, 1996. Co-factors in porcine reproductive and respiratory syndrome (PRRS). Abstracts 77th Ann Meet Conference of Research Workers in Animal Disease, #68. Yang L, Yoon K-J, Zimmerman JJ, Platt KB. November, 1996. Monoclonal antibody analysis of the 15 kD protein of porcine reproductive and respiratory syndrome virus. Abstracts 77th Ann Meet Conference of Research Workers in Animal Disease, #186. Hu X, Patton S, Hallam A, Kliebenstein J, Roberts T, Zimmerman J. October, 1996. Toxoplasma gondii risk factors in swine herds: an assessment of prevalence levels and management strategies. Proc Ann Meet Food Safety Consortium, pp 133-137. Sur H-H, Osorio FA, Wills RW, Zimmerman J, Yoon K-J, Doster AL, Christian S, Galeota-Wheeler J, Palmer GA, McGinley MJ. October, 1996. Characterization of the persistence established by porcine reproductive and respiratory syndrome virus. Abstracts 39th Ann Meet American Assoc Vet Lab Diagnosticians. p 56. Roghmann M-C, Faulkner CT, Patton S, Zimmerman J, Morris JG Jr. September, 1996. Seventh Day Adventists have a decreased seroprevalence for Toxoplasma gondii antibodies. 34th Ann Meet Infectious Diseases Society of America, Abstract no. 234. Anderson M, Yoon K-J, Zimmerman J. August, 1996. Development of improved diagnostics for the detection of porcine cytomegalovirus. Proc Merck Vet Scholars Program, p 10. Patton S, Zimmerman JJ, Roberts T, Faulkner CT, Diderrich VR, Assadi-Rad A, Davies PR, Kliebenstein JB. June, 1996. Seroprevalence of Toxoplasma gondii in the National Animal Health Monitoring System (NAHMS). Program and Abstracts of the American Society of Parasitologists and the Society of Protozoologists, Abst #151. Yang L, Yoon K-J, Zimmerman J, Platt KB. June, 1996. Monoclonal antibody analysis of the antigenic relationship between PRRS virus isolates. Proc North Central Conference of Veterinary Laboratory Diagnosticians, p 35. Gray J, Wills RW, Yoon K-J, Fedorka-Cray P, Yoon K-J, Zimmerman J. March, 1996. Concurrent infection of porcine reproductive and respiratory syndrome virus and Salmonella choleraesuis in swine. Proc Am Assoc Swine Pract, p 585-588. Swenson S, Kinker L, Wu L, Zimmerman J. March, 1996. Evaluation of serological tests for the detection of pseudorabies gI antibodies during early infection. Proc Am Assoc Swine Pract, p 99. Yoon K-J, Zimmerman J, Platt KB. November, 1995. Variability in susceptibility of PRRSV isolates to antibody dependent enhancement may interfere with immunization against PRRSV. Abstracts 76th Ann Meet Conference of Research Workers in Animal Disease, #190. Yoon K-J, Zimmerman JJ, Platt KB. November, 1995. PRRS Serology - Comparison of test performance. Proc Diagnostic Serology and Viral Diagnostics Seminar. Iowa State University, College of Veterinary Medicine, (unnumbered pages). Zimmerman JJ. November, 1995. Designing effective field investigations. Proc Diagnostic Serology and Viral Diagnostics Seminar. Iowa State University, College of Veterinary Medicine, (unnumbered pages). Kliebenstein J, Zimmerman J, Roberts T, Patton S. October, 1995. Prevalence of Toxoplasma gondii antibodies in hogs, farm management practice relationships, and economic costs. Proc Ann Meet Food Safety Consortium, p 219. Zimmerman J. August, 1995. Epidemiología de PRRS. Memorias del XXX Congreso Nacional de la Asociación Mexicana de Veterinarios Especialistas en Cerdos, (no page numbers). Kinker D, Swenson S, Wu LL, Zimmerman J. August, 1995. Evaluation of serological tests for the detection of pseudorabies gI antibodies during early infection. Abstracts 2nd International Symposium on the Eradication of Aujeszky's disease (pseudorabies) virus, p 16. Benfield DA, Christopher-Hennings J, Nelson EA, Nelson J, Yaeger M, Chase CCL, Swenson S, Zimmerman J. August, 1995. Acute and chronic porcine reproductive and respiratory syndrome virus infections in the boar. Proc 36th George A. Young Swine Conference, p 127-132. Zimmerman J. August, 1995. General overview of PRRS virus. A perspective from the United States. Abstracts 2nd International Symposium on Porcine Reproductive and Respiratory Syndrome (PRRS), p 2. Yoon K-J, Zimmerman J, McGinley M, Landgraf L, Frey M, Platt K. August, 1995. Antigenic diversity among PRRS virus isolates in the USA. Abstracts 2nd International Symposium on Porcine Reproductive and Respiratory Syndrome (PRRS), p 9. Yoon K-J, Zimmerman J, McGinley M, Eernisse K, Swenson S, Frey M, Platt K. August, 1995. Comparison of the performance of ELISA to other PRRS serologic assays. Abstracts 2nd International Symposium on Porcine Reproductive and Respiratory Syndrome (PRRS), p 16. Wills R, Zimmerman J, Yoon K-J, Swenson S, McGinley M, Hill H, Platt K, Hennings JC, Nelson E. August, 1995. Porcine reproductive and respiratory syndrome virus - a persistent infection. Abstracts 2nd International Symposium on Porcine Reproductive and Respiratory Syndrome (PRRS), p 19. Zimmerman J, Yoon K-J, Wills R, McGinley M, Sanderson T. August, 1995. PRRS virus in avian species. Abstracts 2nd International Symposium on Porcine Reproductive and Respiratory Syndrome (PRRS), p 29. Wills RW, Zimmerman JJ, Yoon K-J, Swenson SL, McGinley MJ, Hill HT, Platt KB, Christopher-Hennings J, Nelson EA. June, 1995. Persistent infection with porcine reproductive and respiratory syndrome virus. North Central Conf Vet Lab Diag, p 24. Swenson SL, Zimmerman JJ, Evans LE, Bechtol D, Hopkins SM, Wills RW, Yoon K-J, Schwartz KJ, Hill HT, McGinley MJ. June, 1995. Intrauterine exposure of gilts to PRRS virus at the time of artificial insemination. North Central Conf Vet Lab Diag, p 26. Kinker D, Swenson S, Wu LL, Zimmerman J. June, 1995. Evaluation of serologic tests for the detection of pseudorabies Gl antibodies during early infection. North Central Conf Vet Lab Diag, p 20. Zimmerman J, Wills RW, Yoon K-J, Swenson SL, McGinley MJ, Hill HT, Platt KB. April, 1995. PRRS virus: routes of shedding. Proc Ann Meeting Livestock Conservation Institute, pp 258-259. Wills RW, Zimmerman J, Yoon K-J, Swenson SL, McGinley MJ, Hill HT, Platt KB. April, 1995. PRRS virus: isolation from chronically infected swine. Proc Ann Meeting Livestock Conservation Institute, pp 255-257. Wills RW, Zimmerman J, Yoon K-J, Swenson SL, McGinley MJ, Hill HT, Platt KB. March, 1995. Porcine reproductive and respiratory syndrome virus: Isolation from chronically infected swine. Proc Am Assoc Swine Pract, p 387-389. Christopher-Hennings J, Nelson E, Nelson JK, Hines BJ, Chase CCL, Yaeger MJ, Benfield DA, Swenson SL, Zimmerman J, Hill HT. November, 1994. Detection of porcine reproductive and respiratory syndrome virus in boar semen using the polymerase chain reaction. Abstracts 75th Ann Meet Conference of Research Workers in Animal Disease, #243. Zimmerman JJ, Wills RW, Yoon K-J, Swenson SL, Hill HT, Platt KB, McGinley MJ. November, 1994. Persistent PRRS virus infection in experimentally infected swine. Abstracts 75th Ann Meet Conference of Research Workers in Animal Disease, #243. Wills RW, Zimmerman JJ, Swenson SL, Yoon K-J, Hill HT, Bundy DS, McGinley MJ. November, 1994. Transmission of PRRS virus by contact vs airborne exposures. Abstracts 75th Ann Meet Conference of Research Workers in Animal Disease, #242. Zimmerman J, Wills RW, Swenson SL, Yoon K-J, Evans LE, Pirtle EC, Hill HT, McGinley MJ. November, 1994. New findings in PRRS virus epidemiology. Proc Iowa State University College of Veterinary Medicine Swine Disease Conference for Swine Practitioners, pp 21-22. Zimmerman J, Wills RW, Swenson SL, Yoon K-J, Pirtle EC, Hill HT, McGinley MJ. October, 1994. Síndrome disgenésico y respiratorio del cerdo. Proc 14th Pan American Congress on Veterinary Sciences, pp 350-351. Zimmerman J, Wills RW, Swenson SL, Yoon K-J, Hill HT. October, 1994. Where we are at with PRRS virus: an overview. Proc 80th Ann Meet, Interstate Veterinary Medical Association, Inc., p 49. Zimmerman J. September, 1994. Toward an understanding of toxoplasmosis in swine. Proc 8th Internat Congress Animal Hygiene, pp PB 9-12. Yoon K-J, Zimmerman JJ, Swenson SL, Wills RW, Hill HT, Platt KB. June, 1994. Assessment of the biological significance of antibody dependent enhancement (ADE) of porcine epidemic abortion and respiratory syndrome (PEARS) virus infection in passively immunized pigs. Proc 13th Internat Pig Vet Soc Congress, p 69. Swenson SL, Hill HT, Zimmerman J, Evans LE, Landgraf JG, Wills R, McGinley M, Brevik A, Ciszewski D, Frey ML. June, 1994. PEARS virus in experimentally infected boars. Proc 13th Internat Pig Vet Soc Congress, p 58. Zimmerman J, Wills RW, Swenson SL, Pirtle EC, Yoon K-J, Hill HT, McGinley MJ, Ciszewski D. April, 1994. Transmission factors associated with the dissemination of PRRS. Proc Ann Meeting Livestock Conservation Institute, pp 117-118. Swenson SL, Hill HT, Zimmerman J, Evans LE, Landgraf JG, Wills RW, Sanderson TP, Schwartz KJ, McGinley MJ, Brevik A, Yoon K-J, Althouse G, Ciszewski D, Frey ML, Yang L. June, 1994. Porcine reproductive and respiratory syndrome virus in experimentally infected boars: effect of vaccination on viral shedding in semen. Proc North Central Conference of Veterinary Laboratory Diagnosticians (unnumbered pages). Wills RW, Zimmerman J, Swenson SL, Yoon K-J, Hill HT, Bundy DS, McGinley MJ. June, 1994. Transmission of porcine reproductive and respiratory syndrome: contact versus airborne routes. Proc North Central Conference of Veterinary Laboratory Diagnosticians (unnumbered pages). Zimmerman J, Wills RW, Swenson SL, Pirtle EC, Yoon K-J, Hill HT. March, 1994. Notes on PRRS virus transmission. Proc Am Assoc Swine Pract, p 348-349. McGinley MJ, Brevik A, Ciszewski D, Zimmerman J, Swenson S, Yoon K-J, Wills RW, Platt KB, Hill HT, Shibley GP. March, 1994. Prospects for protection against PRRS virus-induced reproductive losses by vaccination. Proc Am Assoc Swine Pract, p 40-41. Yoon K-J, Swenson SL, Zimmerman JJ, Hill HT, Platt KB. November, 1993. An assessment of antibody dependent enhancement activity in passively immunized pigs. 74th Ann Meet Conference of Research Workers in Animal Disease (Abstracts), p 43. Yoon K-J, Swenson SL, Zimmerman JJ, Hill HT, Platt KB. October, 1993. Will antibody dependent enhancement (ADE) interfere with immunization for PRRS virus? American Society for Microbiology, 53rd Annual North Central Branch Meeting, 19S. Swenson SL, Hill HT, Zimmerman J, Evans LE, Wills R, McGinley MJ, Brevik A, Ciszewski D. October, 1993. Porcine reproductive and respiratory syndrome virus and the experimentally infected boar. 36th Ann Meet Am Assoc Vet Lab Diagn, p 44. Yoon K-J, Swenson SL, Eernisse KE, McGinley M, Brevik A, Frey ML, Zimmerman J, Hill HT, Platt KB. October, 1993. Comparison of three seroassays for PRRS virus antibodies. 36th Ann Meet Am Assoc Vet Lab Diagn, p 90. McGinley MJ, Brevik A, Ciszewski D, Zimmerman J, Landgraf JG, Frey ML, Hill HT, Shibley GP. October, 1993. In vitro neutralization of U.S. PRRS virus isolates with antisera directed against PRRS virus isolate ISU-P (ATCC VR-2402). 36th Ann Meet Am Assoc Vet Lab Diagn, p 108. Zimmerman J, Swenson SL, Wills RW, Pirtle EC, Yoon K-J, Hill HT, McGinley MJ. Sept, 1993. On the transmission of porcine reproductive and respiratory syndrome virus. Proc Allen D. Leman Swine Conference, pp 51-52. Swenson SL, Hill HT, Zimmerman J, Evans LE, McGinley MJ, Brevik A. June, 1993. Porcine reproductive and respiratory syndrome virus in experimentally infected boars: isolation from semen. Proc North Central Conference of Veterinary Laboratory Diagnosticians (unnumbered pages). Zimmerman J, Yoon KY, Pirtle EC, Sanderson TJ, Hill HT, Wills RW, McGinley MJ, Brevik A. April, 1993. Susceptibility of four avian species to PRRS virus. Proc Ann Meeting Livestock Conservation Institute, pp 107-108. Swenson SL, Hill HT, Zimmerman J, Evans LE, McGinley MJ, Brevik A. April, 1993. Porcine reproductive and respiratory syndrome virus in experimentally infected boars: isolation from semen. Proc Ann Meeting Livestock Conservation Institute, pp 115-116. Hill HT, Swenson SL, Zimmerman J, McGinley MJ, Brevik A. March, 1993. A comparison of the indirect fluorescent antibody test and the serum virus neutralization test for the detection of antibodies against PRRS virus. Proc Am Assoc Swine Pract, p 717. Swenson SL, Hill HT, Zimmerman J, Evans LE. March, 1993. Porcine reproductive and respiratory syndrome virus in experimentally infected boars: isolation from semen. Proc Am Assoc Swine Pract, pp 719-720 Zimmerman J. January, 1993. An overview of porcine reproductive and respiratory syndrome (PRRS). 111th Ann Meet Iowa Vet Med Assoc, pp 75-86. Meng X-J, Paul PS, Vaughn EM, Zimmerman JJ. November, 1992. Nucleotide sequence of the VP1 gene of swine encephalomyocarditis virus (EMCV) and its use as a nucleic acid probe for the detection of EMCV. 73nd Ann Meet Conference of Research Workers in Animal Disease (Abstracts), p 35. Zimmerman J, Sanderson T, Eernisse KA, Hill HT, Frey ML. May, 1992. Transmission of SIRS virus from convalescent animals to commingled penmates under experimental conditions. Proc International Symposium on Swine Infertility and Respiratory Syndrome (SIRS, PRRS, PEARS). Hill HT, Owen WJ, Eernisse KA, Zimmerman J, Uhlenhopp EK, Frey, ML. May, 1992. Prevalence of SIRS in Iowa swine herds. Proc International Symposium on Swine Infertility and Respiratory Syndrome (SIRS, PRRS, PEARS). Owen WJ, Uhlenhopp EK, Hill HT, Frey ML, Eernisse KA, Zimmerman JJ. April, 1992. Tracking SIRS in the 1980s: preliminary analysis of the Iowa NAHMS swine serum bank. Proc Ann Meeting Livestock Conservation Institute, pp 243-244. Zimmerman JJ, Johnson R. November, 1991. A survey for "Mystery Swine Disease" herds. 72nd Ann Meet Conference of Research Workers in Animal Disease (Abstracts), p 54. Johnson R, Glickman L, Teclaw R, Zimmerman J, Nixon R. November, 1991. Diagnosis of swine reproductive failure syndrome by U.S. veterinary diagnostic laboratories. 72nd Ann Meet Conference of Research Workers in Animal Disease (Abstracts), p 54. Smith KE, Zimmerman JJ, Beran GW, Hill HT, Bolin C. November, 1991. A survey of house mice (Mus musculus) from swine farms in Iowa for antibodies against Leptospira interrogans serovar bratislava. 72nd Ann Meet Conference of Research Workers in Animal Disease (Abstracts), p 59. Zimmerman JJ, Pirtle EC, Meetz MC, Hill HT, Stevenson GW, Kanitz CL. September, 1991. Issues in the serologic diagnosis of EMCV infection. Minnesota Swine Conference for Veterinarians, Minnesota Extension Service, University of Minnesota, St. Paul, Minnesota, pp 292-295. Zimmerman JJ. August, 1991. Mystery Swine Disease. Proc Professional Swine Managers' Conference, Sponsored by Iowa State University Extension, Department of Animal Science, and College of Veterinary Medicine, Ames, Iowa, pp 43-44. Zimmerman JJ. April, 1991. A survey of the American Association of Swine Practitioners for the presence of Mystery Swine Disease herds. Proc Ann Meeting Livestock Conservation Institute, Minneapolis, Minnesota, pp 121-128. Zimmerman JJ. October, 1990. Mystery Swine Disease: epidemiological approaches and needed tools. Proc Mystery Swine Disease Committee Meeting, Livestock Conservation Institute, Denver, Colorado, pp 59-61. Dreesen DW, Zimmerman JJ, Owen WJ, de la Cruz A. July, 1989. Toxoplasma gondii in pork products. Proc 10th Int Symp World Assoc Vet Food Hyg, pp 340-342. Hallam JA, Zimmerman J, Beran GW. 1987. A benefit-cost analysis of the proposed national pseudorabies eradication program. Proc U.S. Animal Health Assoc 91:417-427. Hallam JA, Zimmerman J, Beran GW. 1987. A preliminary cost-benefit analysis of the proposed national pseudorabies eradication program. Proc Livestock Conservation Institute, pp 84-96. Stahr HM, Hyde W, Martin P, Domoto M, Zimmerman J, Osweiler GD. 1983. Analysis of animal tissues for T-2 toxin (trichothecene mycotoxins). Proc 3rd Int Symp World Assoc Vet Lab Diagn, pp 315-321. Nonrefereed Publications: Wang C-H, Kliebenstein J, Hallam A, Zimmerman J, Diderrich V, Patton S, Faulkner C, McCord R, Bush E. 2001. Levels of Toxoplasma gondii in swine operations. 2000 Swine Research Report, p 198-201. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Yoon K-J, Chang C-C, Zimmerman JJ, Harmon K. 2001. Field and experimental assessment of PRRSV evolution. 2000 Swine Research Report, p 182-184. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Horter DC, Chang C-C, Pogranichnyy R, Yoon K-J, Zimmerman JJ. 2000. Persistence of PRRS virus in nursery pigs. 1999 Swine Research Report, p 187. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Wagstrom EA, Chang C-C, Yoon K-J, Zimmerman JJ. 1999. Porcine reproductive and respiratory syndrome virus (PRRSV) shedding in milk and colostrum (NPPC Project #1681). 1997 - 1998 Research Investment Report. National Pork Producers Council, Des Moines Iowa, p 36. Bush EJ, Corso B, Zimmerman J, Swenson S, Pyburn D, Burkgren T. 1999. Update on the acute PRRS investigative study. Swine Health and Production 7(4):179-180. Wagstrom EA, Yoon K-J, Zimmerman JJ. 1999. Diagnostic performance of a RT-PCR test for the detection of PRRS virus in serum. 1998 Swine Research Report, p 188. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Senn MK, Yoon K-J, Zimmerman JJ, Thacker BJ. 1999. Decay of colostrum-derived antibodies to porcine reproductive and respiratory syndrome (PRRS) virus in neonatal swine nursing immune dams. 1998 Swine Research Report, p 189. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Wagstrom EA, Chang C-C, Yoon K-J, Zimmerman JJ. 1998. Shedding of PRRS virus in milk and colostrum. 1997 Swine Research Report, p 161. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman J, Epperson W, Wills RW, McKean JD. 1997. Results of the recent survey of the membership of the AASP for outbreaks of sow abortion and mortality. Swine Health and Production 5(2):74-75. Wills RW, Fedorka-Cray PJ, Yoon K-J, Gray JT, Stabel T, Zimmerman JJ. 1997. Synergism between porcine reproductive and respiratory syndrome virus (PRRSV) and Salmonella choleraesuis. 1997 Nebraska Swine Report, pp 12-14. Institute of Agriculture and Natural Resources. University of Nebraska-Lincoln. Wills RW, Fedorka-Cray PJ, Yoon K-J, Gray JT, Stabel T, Zimmerman J. 1997. Synergism between porcine reproductive and respiratory syndrome virus and Salmonella choleraesuis. 1996 Swine Research Report, pp 176-178. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Hu X, Kliebenstein J, Patton S, Zimmerman J, Hallam A, Roberts T, Bush E. 1997. Toxoplasma gondii in US swine operations: an assessment of management factors. Iowa State University Department of Economics Staff Paper 288. Hu X, Patton S, Hallam A, Kliebenstein J, Roberts T, Zimmerman JJ. 1997. Toxoplasma gondii in U.S. swine herds: an assessment of herd factors. 1996 Swine Research Report, pp 240-241. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Yoon K-J, Zimmerman JJ, Chang C-C, Reitz P, McGinley MJ. 1997. Effect of challenge dose and route on transmission of PRRS virus infection. 1996 Swine Research Report, pp 173-175. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Swenson S, Zimmerman J. 1996. A word about PRRS and boar semen (letter). Pork '96 16(2):8. Zimmerman J, Wills RW, Yoon K-J, Schwartz KJ, Hoffman L, Fedorka-Cray P, Gray J. 1996. Respiratory disease in young swine: comparison of the effects of separate and concurrent infections with porcine reproductive and respiratory syndrome virus (PRRSV) and Salmonella choleraesuis. Research Investment Report. National Pork Producers Council, Des Moines Iowa, pp 577-585. Wills RW, Zimmerman J, Yoon K-J, Swenson SL, McGinley MJ, Hill HT, Platt KB. 1996. Persistent infection with porcine reproductive and respiratory syndrome virus. 1995 Swine Research Report, pp 157-159. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Wills RW, Zimmerman J, Yoon K-J, Swenson SL, McGinley MJ, Hill HT, Platt KB. 1996. Portals of exit of porcine reproductive and respiratory syndrome virus. 1995 Swine Research Report, pp 160-162. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Kliebenstein J, Zimmerman J, Roberts T, Patton S. 1996. Prevalence of Toxoplasma gondii antibodies in hogs, farm management practice relationships, and economic costs. 1995 Swine Research Report, pp 223. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Swenson SL, Hill HT, Zimmerman J, Wills R, Sanderson T, Evans LE. 1995. PRRS virus infection in boars: isolation from semen and effect on semen quality. Research Investment Report, pp 93-96. National Pork Producers Council, Des Moines Iowa. Wills RW, Zimmerman J, Swenson SL, Yoon K-J, Hill HT, Bundy DS, McGinley MJ. 1995. Transmission of PRRS virus by contact vs airborne exposures. Research Investment Report, pp 103-108. National Pork Producers Council, Des Moines Iowa. Swenson SL, Hill HT, Zimmerman J, Wills R, Schwartz KJ, Evans LE, Althouse GC, Yoon K-J 1995. Artificial insemination of gilts with porcine reproductive and respiratory syndrome (PRRS) virus-contaminated semen. Research Investment Report, pp 455-460. National Pork Producers Council, Des Moines Iowa. Swenson SL, Hill HT, Zimmerman J, Wills R, Schwartz KJ, Evans LE, Althouse GC, Yoon K-J, McGinley M, Brevik A, Ciszewski D. 1995. Preliminary assessment of the effect of vaccination on the excretion of porcine reproductive and respiratory syndrome (PRRS) virus in semen. 1994 Swine Research Report, pp 137-139. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Swenson SL, Hill HT, Zimmerman J, Wills R, Schwartz KJ, Evans LE, Althouse GC, Yoon K-J, McGinley M, Brevik A. 1995. Artificial insemination of gilts with porcine reproductive and respiratory syndrome (PRRS) virus-contaminated semen. 1994 Swine Research Report, pp 134-136. Cooperative Extension Service, Iowa State University, Ames, Iowa, 5001. Swenson SL, Hill HT, Zimmerman J, Wills R, Sanderson T, Evans LE, McGinley M, Brevik A, Ciszewski D. 1994. Porcine reproductive and respiratory syndrome virus and the experimentally infected boar. 1993 Swine Research Report, pp 134-135. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman J, Schwartz K, Hill HT, Meetz MC, Simonson R, Carlson JH. 1994. Encephalomyocarditis (EMC) virus in swine: effect of dose and route on transmission. 1993 Swine Research Report, pp 148-149. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Yoon K-J, Swenson SL, Zimmerman J, Hill HT, Platt KB. 1993. Will immunization prevent or increase the severity of porcine reproductive and respiratory syndrome (PRRS)? 1993 Swine Research Report, pp 132-133. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman J, Schwartz K, Hill HT, Meetz MC. 1993. Effect of virus dose and challenge route on transmission of encephalomyocarditis virus to swine. Research Investment Report, pp 105-109. National Pork Producers Council, Des Moines Iowa. Paul PS, Meng X-J, Zimmerman J. 1993. Role of encephalomyocarditis (EMC) virus in "Mystery Swine Disease." Research Investment Report, pp 71-74. National Pork Producers Council, Des Moines Iowa. Paul PS, Meng X-J, Zimmerman J. 1992. DNA probe for the detection of encephalomyocarditis virus in swine. 1992 Swine Research Report, pp 148-149. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman J, Hill HT, Owen WJ, Uhlenhopp EK, Frey ML, Eernisse KA. 1992. Prevalence of porcine reproductive and respiratory syndrome (Mystery Swine Disease) virus in Iowa swine. 1992 Swine Research Report, pp 135-136. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Smith B, Sanderson TP, Zimmerman J, Hill HT. 1992. Porcine reproductive and respiratory syndrome (Mystery Swine Disease) virus infection in growing pigs. 1992 Swine Research Report, pp 138-139. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman J, Sanderson T, Eernisse K, Hill H, Frey M. 1992. Transmission of SIRS virus from convalescent animals to commingled penmates under experimental conditions. American Association of Swine Practitioners Newsletter 4(4):27. Smith KE, Zimmerman JJ, Patton S, Beran GW, Hill HT. 1991. Toxoplasma gondii infection in swine and free-living mammals on Iowa farms. 1991 Swine Research Report, pp 121-124. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Smith KE, Zimmerman JJ, Beran GW, Hill HT. 1991. The presence of antibodies against encephalomyocarditis virus in swine and free-living species on Iowa swine farms. 1991 Swine Research Report, pp 118-120. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Smith KE, Zimmerman JJ, Beran GW, Hill HT, Bolin CA. 1991. Evidence of Leptospira interrogans serovar bratislava infection in house mice (Mus musculus) captured on Iowa swine farms. 1991 Swine Research Report, pp 115-117. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman JJ. 1991. A survey for Mystery Swine Disease herds. 1991 Swine Research Report, pp 85-88. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman JJ. 1991. Mystery swine disease survey update. American Association of Swine Practitioners Newsletter 3(1):8. Zimmerman JJ, Owen WJ, Hill HT, Beran GW. 1990. A survey of encephalomyocarditis virus (EMCV) infection in Iowa swine. 1990 Swine Research Report, pp 54-57. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman JJ, Hill HT, Beran GW, Meetz MC. 1990. Diagnosing encephalomyocarditis virus (EMCV) infection in swine by the microtitration serum neutralization test. 1990 Swine Research Report, pp 52-53. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman JJ, Berry WJ, Beran GW, Murphy DP. 1989. The effect of environmental temperature and fly age on the persistence of pseudorabies virus in house flies (Musca domestica ). 1989 Swine Research Report, pp 77-79. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Zimmerman JJ, Dreesen DW, Owen WJ, Beran GW. 1989. A survey of Toxoplasma gondii in Iowa swine. 1989 Swine Research Report, pp 84-85. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Hallam A, Zimmerman J, Beran GW. 1987. The cost of clinical pseudorabies in Iowa swine herds. 1987 Swine Research Report, pp 110-120. Cooperative Extension Service, Iowa State University, Ames, Iowa, 50011. Hallam A, Zimmerman J. August, 1987. Cost of clinical PRV. Hog Farm Management. Hallam A, Zimmerman J. September, 1986. Cost of PRV cleanup in the Iowa project. Hog Farm Management, pp 12-13. |