Gregory Stevenson

DVM, MS, PhD, Diplomate ACVP
Education & Certifications  

DVM, Iowa State University, 1979
MS, Veterinary Pathology, Iowa State University, 1981
PhD, Veterinary Pathology, Iowa State University, 1990
Diplomate, American College of Veterinary Pathology, 1991


VDPAM 455 - Diagnostic Laboratory Practicum; Instructor
VDPAM 456 - Veterinary Diagnostic Lab Methods & Applications; Course coordinator & Instructor

Research Focus & Interests  

Veterinary Pathology
Veterinary Diagnostic Medicine
Infectious Diseases of Food Producing Animals

Honors & Awards  

Howard Dunne Memorial Award, by the American Association of Swine Veterinarians in recognition of members who have made important contributions and provided outstanding service to the association and the swine industry, 2008.

Team of the Year, ISU CVM (for PEDV identification, test development, testing and reporting)


American College of Veterinary Pathology
American Association of Veterinary Laboratory Diagnosticians
American Association of Swine Veterinarians

Selected Publications  

Langohr IM, Stevenson GW, Nelson E A, Lenz S D, HogenEsch H, Wei H, Pogranichniy RM: Vascular lesions in pigs experimentally infected with Porcine circovirus type 2 serogroup B. Vet Path 47:140-147, 2010.

Bangari DS, Pogranichniy RM, Gillespie T, Stevenson GW: Genotyping of Porcine teschovirus from nervous tissue of pigs with and without polioencephalomyelitis in Indiana. J Vet Diagn Invest 22:594-597, 2010.

Wei H, Lenz SD, Van Alstine WG, Stevenson GW, Langohr IM, Pogranichniy RM. Infection of cesarean-derived colostrum-deprived pigs with Porcine circovirus type 2 and with influenza virus. Comp Med 60:45-50, 2010.

Langohr IM, Stevenson GW, Nelson EA, Lenz SD, Wei H, Pogranichniy RM. Experimental co-infection of pigs with Bovine viral diarrhea virus 1 and Porcine circovirus-2. J Vet Diagn Invest 24:51-64, 2012.

Madson, DM, Ensley SM, Gauger PC, Schwartz KJ, Stevenson GW, Cooper VL, Janke BH, Burrough ER, Goff JP, Horst RL. Rickets: Case series and diagnostic review of hypovitaminosis D in swine. J Vet Diagn Invest 24:1137-44, 2012.

Stevenson GW, Hoang H, Schwartz KJ, Burrough ER, Sun D, Madson D, Cooper VL, Pillatzki A, Gauger P, Schmitt BJ, Koster LG, Killian ML, Yoon KJ. Emergence of Porcine epidemic diarrhea virus in the United States: clinical signs, lesions, and viral genomic sequences. J Vet Diagn Invest 25:649-654, 2013.

Chen Q, Li G., Stasko J, Thomas JT, Stensland WR, Pillatzki AE, Gauger PC, Schwartz KJ, Madson D, Yoon KJ, Stevenson GW, Burrough ER, Harmon KM, Main RG, and Zhang J. Isolation and characterization of porcine epidemic diarrhea viruses associated with the 2013 disease outbreak among swine in the United States. J Clin Micro 52: 234-243, 2014.

Madson DM, Magstadt DR, Arruda PHE, Hoang H, Sun D, Bower LP, Bhandari M, Burrough ER, Gauger PC, Pillatzki AE, Stevenson GW, Wilberts BL, Brodie J, Harmon KM, Wang C, Main RG, Zhang J and Yoon KJ.  Pathogenesis of porcine epidemic diarrhea virus isolate (US/Iowa/18984/2013) in 3-week-old weaned pigs. Vet Microbiol 174:60-68. 2014. 

Wilson CR, Mulligan CC, Strueh KD, Stevenson GW, Hooser SB. Rapid detection of terbufos in stomach contents using desorption electrospray ionization mass spectrometry. J Vet Diagn Invest 26:428-430, 2014.

Arnold J, Madson DM, Endlsey SM, Goff JP, Sparks C, Stevenson GW, Crenshaw T, Wang C, Horst R. Survey of serum vitamin D status across stages of swine production and evaluation of supplemental bulk vitamin D premixes used in swine diets. JSHAP 23:28-34, 2015.

Olds J, Burrough E, Madson D, Ensley S, Horst R, Schwartz K, Stevenson G, Gauger P, Cooper V, Arruda P, Opriessnig T. Clinical investigation in to feed-related hypervitaminosis D in a captive flock of budgerigars (Melopsittacus undulatus): morbidity, mortalities, and pathologic lesions. J Zoo and Wildlife Med 46:9-17, 2015.

Pillatzki AE, Gauger PC, Madson DM, Burrough ER, Zhang J, Magstadt DR, Arruda PHE, Stevenson GW, Yoon KJ. Experimental infection of neonatal pigs with porcine epidemic diarrhea virus (PEDV) utilizing contaminated feed. JSHAP 23:317-320, 2015.

Madson DM, Arruda PHE, Burrough ET, Hoang H, Sun D, Bower LP, Bhandari M, Gauger PC, Stevenson GW, Wilberts BL, Wang C, Zhang J, Yoon KJ. Characterization of porcine epidemic diarrhea virus isolate US/Iowa/18984/2013 infection in one-day-old caesarian derived colostrum deprived (CDCD) neonatal piglets. Vet Path 53:44-52, 2016.

Arruda PHE, Stevenson GW, Killian ML, Burrough ER, Gauger PC, Harmon KM, Magstadt DR, Yoon, KJ, Zhang J, Madson DM, Pineyro P, Derscheid RJ, Scheartz KJ, Cooper VL, Galbur PG, Main RG, Sato Y, Arruda BL. Natural outbreak of H5N2 highly pathogenic avian influenza virus in 2015 in two commercial layer facilities in Iowa: Lesions and viral antigen distribution. J Vet Diag Invest (in-press)