Picture of John Ellis

John Ellis Professor, Department of Veterinary Microbiology

Research Area(s)

  • Vaccine safety and efficacy

Academic Credentials

  • DVM, University of Illinois
  • PhD, Colorado State University
  • Post Doctoral Fellowship, International Laboratory for Research on Animal Diseases, Nairobi, Kenya
  • Diplomate, American College of Veterinary Pathologists
  • Diplomate, American College of Veterinary Microbiologists (Immunology, Virology)


McIntosh KA. Krakowka S. Ringler SS. Ellis JA.  In situ detection of urease-positive Helicobacter pylori-like organisms on swine gastric mucosa. Canadian Journal of Veterinary Research. 74(3):237-40, 2010 Jul.

Harding JC. Ellis JA. McIntosh KA. Krakowka S.  Dual heterologous porcine circovirus genogroup 2a/2b infection induces severe disease in germ-free pigs. Veterinary Microbiology. 145(3-4):209-19, 2010 Oct 26.

Ellis JA. Gow SP. Goji N, 2010.  Response to experimentally induced infection with bovine respiratory syncytial virus following intranasal vaccination of seropositive and seronegative calves.  Journal of the American Veterinary Medical Association236(9):991-9.

Ellis JA, 2009.  Update on viral pathogenesis in BRD.  Animal Health Research Reviews10(2):149-53.

Xue W. Ellis J. Mattick D. Smith L. Brady R. Trigo E, 2010.   Immunogenicity of a modified-live virus vaccine against bovine viral diarrhea virus types 1 and 2, infectious bovine rhinotracheitis virus, bovine parainfluenza-3 virus, and bovine respiratory syncytial virus when administered intranasally in young calves.  Vaccine28(22):3784-92.

Gamage LN. Ellis J. Hayes S, 2009.  Immunogenicity of bacteriophage lambda particles displaying porcine Circovirus 2 (PCV2) capsid protein epitopes.  Vaccine27(47):6595-604.

Ellis JA. Gow SP. Goji N. Jones C. Workman A. Henderson G. Rhodes C. Alaniz G. Meinert TR. Tucker CM 2009.   Efficacy of a combination viral vaccine for protection of cattle against experimental infection with field isolates of bovine herpesvirus-1.  Journal of the American Veterinary Medical Association235(5):563-72.

McIntosh KA, Tumber A, Harding JC, Krakowka S, Ellis JA, Hill JE., 2009.  Development and validation of a SYBR green real-time PCR for the quantification of porcine circovirus type 2 in serum, buffy coat, feces, and multiple tissues. Vet Microbiol.133(1-2):23-33.

Pozzuto T, Mueller B, Meehan B, Ringler SS, McIntosh KA, Ellis JA, Mankertz A, Krakowka S., 2009.  In utero transmission of porcine torque teno viruses.  Vet Microbiol., 137(3-4):375-379.

Calvin W. Booker, Sameeh M. Abutarbush, Paul S. Morley, P. Timothy Guichon, Brian K. Wildman, G. Kee Jim, Oliver C. Schunicht, Tom J. Pittman, Tye Perrett, John A. Ellis, Greg Appleyard, and Deborah M. Haines, 2008.  The effect of bovine viral diarrhea virus infections on health and performance of feedlot cattle.  Can Vet J.49(3):253–260.

Kathleen A. McIntosh, John C.S. Harding, Sarah Parker, Steven Krakowka, Gordon Allan, and John A. Ellis, 2008.  Quantitative polymerase chain reaction for Porcine circovirus-2 in swine feces in a Porcine circovirus disease-affected commercial herd and a nonaffected commercial herd. Can Vet J., 49(12): 1189–1194.

Krakowka S, Ellis JA, 2008.  Evaluation of the effects of porcine genogroup 1 torque teno virus in gnotobiotic swine.  Am J Vet Res., 69(12):1623-9.

Krakowka S, Hartunian C, Hamberg A, Shoup D, Rings M, Zhang Y, Allan G, Ellis JA, 2008.  Evaluation of induction of porcine dermatitis and nephropathy syndrome in gnotobiotic pigs with negative results for porcine circovirus type 2.  Am J Vet Res.69(12):1615-22.

Ellis JA, Allan G, Krakowka S, 2008.  Effect of coinfection with genogroup 1 porcine torque teno virus on porcine circovirus type 2-associated postweaning multisystemic wasting syndrome in gnotobiotic pigs.  Am J Vet Res., 69(12):1608-14.

Krakowka S, Ringler SS, Arumugam P, McKillen J, McIntosh K, Hartunian C, Hamberg A, Rings M, Allan G, Ellis JA, 2008.  Evaluation of Mycoplasma hyopneumoniae bacterins for porcine torque teno virus DNAs.  Am J Vet Res., 69(12):1601-7.

Harding, JCS, Auckland, CD, Tumber, A, McIntosh, KA, Parker, SE, Middleton, DM, Hill, JE, Ellis, JA, Krakowka, S, 2008. Porcine circovirus-2 DNA concentration distinguishes wasting from non-wasting pigs and is correlated with lesion distribution, severity and nucleocapsid staining intensity. J Vet Diagn Invest20:274-282.

Segalés J, Olvera A, Grau-Roma L, Charreyre C, Nauwynck H, Larsen L, Dupont K, McCullough K, Ellis J, Krakowka S, Mankertz A, Fredholm M, Fossum C, Timmusk S, Stockhofe-Zurwieden N, Beattie V, Armstrong D, Grassland B, Baekbo P, Allan G, 2008.  PCV-2 genotype definition and nomenclature. Vet Rec162(26):867-8.

Krakowka, S., Ellis, J., McNeilly F., Waldner, C., Rings, D. M., Allan, G, 2007. Myco-plasma hyopneumoniae bacterins and porcine circovirus type 2 (PCV2) infection: Induction of postweaning multisystemic wasting syndrome (PMWS) in the gnotobiotic swine model of PCV2-associated disease. Can Vet J48:716-724.

McCullough, K. C., Vincent, I. E., Summerfield, A, Krakowka, S., Ellis, J. A., Segales J., Allan, G. M. 2007. La immunologia de las infecciones causadas por circovirus porcino tipo 2.  Suis41:14-20.

Allan GM, McNeilly F, McMenamy M, McNair I, Krakowka SG, Timmusk S, Walls D, Donnelly M, Minahin D, Ellis J, Wallgren P, Fossum C. 2007. Temporal distribution of porcine circovirus 2 genogroups recovered from postweaning multisystemic wasting syndrome affected and nonaffected farms in Ireland and Northern Ireland. J Vet Diagn Invest19(6):668-73.

Imai DM. Cornish J. Nordhausen R. Ellis J. MacLachlan NJ., 2007. Renal tubular necrosis and interstitial hemorrhage ("turkey-egg kidney") in a circovirus-infected Yorkshire cross pig. Journal of Veterinary Diagnostic Investigation, 18(5):496-9.

Allan GM. Caprioli A. McNair I. Lagan-Tregaskis P. Ellis J. Krakowka S. McKillen J. Ostanello F. McNeilly F., 2007.  Porcine circovirus 2 replication in colostrum-deprived piglets following experimental infection and immune stimulation using a modified live vaccine against porcine respiratory and reproductive syndrome virus. Zoonoses & Public Health54(5):214-22.

Ellis J. Gow S. West K. Waldner C. Rhodes C. Mutwiri G., 2007.  Response of calves to challenge exposure with virulent bovine respiratory syncytial virus following intranasal administration of vaccines formulated for parenteral administration. Journal of the American Veterinary Medical Association230(2):233-43.

Ellis JA. Martin BV. Waldner C. Dyer KD. Domachowske JB. Rosenberg HF., 2007.  Mucosal inoculation with an attenuated mouse pneumovirus strain protects against virulent challenge in wild type and interferon-gamma receptor deficient mice. Vaccine25(6):1085-95.