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Photo: Patricia Ann Conrad

Patricia Ann Conrad- AS, BS, DVM, PhD
Pathology, Microbiology & Immunology

5311 Vet Med 3A
Davis, CA 95616

+1 530 752 7210


Research Focus

Investigate the sources, ecology and importance of protozoal pathogens, particularly Toxoplasma gondii and Sarcocytis neurona, that are fecally transmitted from wild and/or domestic terrestrial animals into freshwater and marine environments

Specialty Focus



1975 AS Preveterinary Medicine, Summa Cum Laude, Otero Junior College, La Junta, Colorado
1977 BS Veterinary Science, Colorado State University, Fort Collins, Colorado
1980 DVM Veterinary Medicine, Colorado State University, Fort Collins, Colorado
1984 PhD Protozoology/Tropical Animal Health, University of Edinburgh, Edinburgh, Scotland, United Kingdom

Honors and Awards

1980-1983 Marshall Aid Commemoration Commission Scholarship
1986 Cold Spring Harbor Laboratory Scholarship
1992 Charles Davis Foundation Journal Scholarship Award
1993 National Institutes of Health FIRST Award
1994 Presidential Symposium Speaker for American Association of Veterinary Parasitologists and American Veterinary Medical Association
1998 Pfizer Award for Research Excellence
1999 Carl J. Norden Distinguished Teaching Award
2001 Graduate Student, Dr. Melissa Miller (Checkowitz) was awarded Graduate Student Research Award for the Wildlife Disease Association
2002 Manuscript #99 was selected by American College of Zoological Medicine as Best Manuscipt of 2002
2003 Oscar W. Schalm Lectureship
2004 Aldo Leopold Leadership Fellowship
2006 Norman Levine Lecturship, University of Illinois
Patent Bovine Neospora Isolates and their Uses US Patent No. 5,707,617 issued 1/13/98
Patent Identification, Characterization & Expression of Neospora Recombinant Gene Fragments Encoding Immunodominant Antigens, US patent Nos. 5,889,166 (3/30/99),6,376,196(4/23/02), 6,716,423 (4/06/04), 6,777,192 (8/17/04), 7,056,501 (6/6/06)
Patent Recombinant Neospora Antigens and their uses, Patent No. 7,056,501 issued 6/06/06
Patent Equine Neospora Isolate, US patent No. 6,071,737, issued 6/06/00

Active Research Grants

Principal Investigator, Research related to protozoal disease common to both horses and marine mammals of California, (Principal Investigator), Moss Foundation

Principal Investigator, Roles of Marine Host Cycle and Particle Aggregation in Transmission of Zoonotic Pathogens in Coastal Ecosystems, (Principal Investigator), National Science Foundation, Ecology of Infectious Disease Program

Principal Investigator, Improved Detection of Toxoplasma gondii Oocysts in Drinking and Recreational Waters, (Principal Investigator), California Ocean Protection Council

Co-Investigator, PREDICT: Wildlife SMART surveillance, Mazet (Principal Investigator), USAID Avian and Pandemic Influenza and Zoonotic Disease Program

Principal Investigator, UC Global Health Institute Center of Expertise: Water, Animals, Food, and Society, (Principal Investigator), Anonymous Donor

Most Recent 10 Publications

  • Link Icon 2011 Colegrove K, Grigg ME, Carlson-Bremer D, Miller RH, Gulland FM, Ferguson DJ, Rejmanek D, Barr BC, Nordhausen R, Melli AC, Conrad PA Discovery of three novel coccodian parasites infecting California sea lions (Zalophus Californianus), with evidence of sexual replication and interspecies pathogenicity J Parasitol,
  • Link Icon 2011 Goldstein T, Gill VA, Tuomi P, Monson D, Burdin A, Conrad PA, Dunn JL, Field C, Johnson C, Jessup DA, Bodkin J, Doroff AM Assessment of clinical pathology and pathogen exposure in sea otters (enhydra lutris) bordering the threatened population in alaska J Wildl Dis,
  • Link Icon 2011 Tsai YL, Chomel BB, Chang CC, Kass PH, Conrad PA, Chuang ST Bartonella and Babesia infections in cattle and their ticks in Taiwan Comp Immunol Microbiol Infect Dis,
  • Link Icon 2011 Pusterla N, Conrad PA, Packham AE, Mapes SM, Finno CJ, Gardner IA, Barr BC, Ferraro GL, Wilson WD Endogenous Transplacental Transmission of Neospora hughesi in Naturally Infected Horses J Parasitol,
  • Link Icon 2010 Shapiro K, Conrad PA, Mazet JA, Wallender WW, Miller WA, Largier JL Effect of estuarine wetland degradation on transport of Toxoplasma gondii surrogates from land to sea Appl Environ Microbiol,
  • Link Icon 2010 Lewis DJ, Atwill ER, Lennox MS, Pereira MD, Miller WA, Conrad PA, Tate KW Management of microbial contamination in storm runoff from California coastal dairy pastures J Environ Qual,
  • Link Icon 2010 Schriewer A, Miller WA, Byrne BA, Miller MA, Oates S, Conrad PA, Hardin D, Yang HH, Chouicha N, Melli A, Jessup D, Dominik C, Wuertz S Presence of Bacteroidales as a predictor of pathogens in surface waters of the central California coast Appl Environ Microbiol,
  • Link Icon 2010 Miller MA, Conrad PA, Harris M, Hatfield B, Langlois G, Jessup DA, Magargal SL, Packham AE, Toy-Choutka S, Melli AC, Murray MA, Gulland FM, Grigg ME A protozoal-associated epizootic impacting marine wildlife: mass-mortality of southern sea otters (Enhydra lutris nereis) due to Sarcocystis neurona infection Vet Parasitol,
  • Link Icon 2010 Dabritz HA, Conrad PA Evaluation of an educational handout on knowledge about toxoplasmois Scientia Medica, Porto Alegre,
  • Link Icon 2010 Rejmanek D, Miller MA, Grigg ME, Crosbie PR, Conrad PA Molecular characterization of Sarcocystis neurona strains from opossums (Didelphis virginiana) and intermediate hosts from Central California Vet Parasitol,

Most Recent 5 Book Chapters

2005 Brewer CA, Berkowitz AR, Conrad PA, Patz JA, Porter J, Waterman M: Infectious Disease Ecology: Effects of Ecosystems on Disease and of Disease on Ecosystems, Ostfeld RS, Keesing F, Eviner VT, (ed), Educating About the Ecology of Infectious Diseases, Princeton, NJ. 448-466.

2001 Kjemtrup, AM and PA Conrad: Emerging perspectives on human babesiosis, WM Scheld, WA Craig and JM Hughes, (ed), Emerging Infections, Washington, D.C.. 175-195.

1995 Courtney, C, PA Conrad, WB Boyce and J Barlough: Internal parasites, M Siegal and J Barlough, (ed), UC Davis Book of Dogs, New York, NY. 387-407.

1994 Anderson, ML, BC Barr and PA Conrad: Protozoal Causes of Reproductive Failure in Domestic Ruminants, RB Miller, (ed), The Veterinary Clinics of North America, Food Animal Practice Diagnosis of Abortion. 439-461.

1992 Conrad, PA and KA Waldrup: Babesiosis and Theileriosis in Freeliving and Captive Artiodactylids, M Fowler, (ed), Zoo and Wildlife Medicine, Philadelphia, PA. 506-511.