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Allen Roussel

Professor of Large Animal Internal Medicine


Phone: (979) 845-9102

Office: VLAH 208

Mailstop: 4475

Department: VLCS

Photo of Roussel, Allen


  • M.S. Veterinary Clinical Sciences, Purdue University 1984
  • D.V.M. Veterinary Medicine, Louisiana State University 1977


  • De Facto Diplomate, European College of Bovine Health Management
  • Diplomate, American College of Veterinary Internal Medicine
  • Texas Veterinary Medical License: 4218

Scholarly Interests

Food animal medicine, Johne's disease, internal medicine and meat goats. Paratuberculosis, clinical laboratory diagnostic testing and interpretation, gastrointestinal motility of domestic animals, fluid and electrolyte balance in large animals.


Mineral Composition of Uroliths Obtained from Sheep and Goats with Obstructive Urolithiasis.
M L Jones, P M Gibbons, A J Roussel, B J Dominguez
Journal of veterinary internal medicine. 2017 31(4):1202-1208.
Fluid and electrolyte therapy.
Allen J Roussel, Geof W Smith
The Veterinary clinics of North America. Food animal practice. 2014 30(2):ix-x.
Fluid therapy in mature cattle.
Allen J Roussel
The Veterinary clinics of North America. Food animal practice. 2014 30(2):429-39, vi-vii.
Culling decisions based on microbiological and serological test results for Johne’s Disease in commercial beef cow-calf herds are not economically justifiable
Roussel, AJ
Comparison of calf weaning weight and associated economic variables between beef cows with and without serum antibodies against or isolation from feces of Mycobacterium avium subsp paratuberculosis
Bhattarai B*, GT Fosgate, JB Osterstock, CP Fossler, SC Park, and AJ Roussel
J Am Vet Med Assoc. 2013
Perceptions of veterinarians in bovine practice and producers with beef cow-calf operations enrolled in the US Voluntary Bovine Johne’s Disease Control Program concerning economic losses associated with Johne’s disease
Bhattarai B*, GT Fosgate, JB Osterstock, CP Fossler, SC Park, and AJ Roussel
Prev Vet Med. 2013
Benefits of obtaining test-negative Level 4 classification for beef producers in the Voluntary Bovine Johne's Disease Control Program.
Benjamin LA, Fosgate GT, Ward MP, Roussel AJ, Feagin RA, Schwartz AL
Prev Vet Med. 2009 91(2-4):280-4.
Preliminary investigation of a humoral and cell-mediated immunity ratio for diagnosis of paratuberculosis in beef cattle.
Fosgate GT, Osterstock JB, Benjamin LA, Dobek GL, Roussel AJ
Prev Vet Med. 2009 91(2-4):226-33.
Use of Walpole's solution for treatment of goats with urolithiasis: 25 cases (2001-2006).
Janke JJ, Osterstock JB, Washburn KE, Bissett WT, Roussel AJ, Hooper RN
J Am Vet Med Assoc. 2009 234(2):249-52.
Comparison of three methods of surveillance with application to the detection of Johne's disease seropositivity in Texas cattle.
Pearce BH, Fosgate GT, Ward MP, Roussel AJ, Norby B, Tavornpanich S, Ellis D
Prev Vet Med. 2008 86(1-2):1-7.
Familial associations with paratuberculosis ELISA results in Texas Longhorn cattle.
Osterstock JB, Fosgate GT, Cohen ND, Derr JN, Manning EJ, Collins MT, Roussel AJ
Vet Microbiol. 2008 129(1-2):131-8.
Assessing familial aggregation of paratuberculosis in beef cattle of unknown pedigree.
Osterstock JB, Fosgate GT, Derr JN, Cohen ND, Roussel AJ
Prev Vet Med. 2008 84(1-2):121-34.
Evaluation of the ruminant serum chemistry profile.
Russell KE, Roussel AJ
Vet Clin North Am Food Anim Pract. 2007 23(3):403-26.
Contribution of environmental mycobacteria to false-positive serum ELISA results for paratuberculosis.
Osterstock JB, Fosgate GT, Norby B, Manning EJ, Collins MT, Roussel AJ
J Am Vet Med Assoc. 2007 230(6):896-901.
Association of fecal shedding of mycobacteria with high ELISA-determined seroprevalence for paratuberculosis in beef herds.
Roussel AJ, Fosgate GT, Manning EJ, Collins MT
J Am Vet Med Assoc. 2007 230(6):890-5.
Are feeding practices associated with duodenitis-proximal jejunitis?
Cohen ND, Toby E, Roussel AJ, Murphey EL, Wang N
Equine Vet J. 2006 38(6):526-31.
Pharmacokinetics and clinical effects of a subanesthetic continuous rate infusion of ketamine in awake horses.
Fielding CL, Brumbaugh GW, Matthews NS, Peck KE, Roussel AJ
Am J Vet Res. 2006 67(9):1484-90.
Protothecal enteritis as a cause of protein-losing enteropathy in a bull.
Osterstock JB, Mansell JL, Roussel AJ Jr
J Am Vet Med Assoc. 2005 227(9):1476-9.
Effects of seasonal climatic conditions on the diagnosis of Mycobacterium avium subspecies paratuberculosis in dairy cattle.
Strickland SJ, Scott HM, Libal MC, Roussel AJ Jr, Jordan ER
J Dairy Sci. 2005 88(7):2432-40.
Effect of an indwelling nasogastric tube on gastric emptying rates of liquids in horses.
Lammers TW, Roussel AJ, Boothe DM, Cohen ND
Am J Vet Res. 2005 66(4):642-5.
Prevalence of and risk factors for paratuberculosis in purebred beef cattle.
Roussel AJ, Libal MC, Whitlock RL, Hairgrove TB, Barling KS, Thompson JA
J Am Vet Med Assoc. 2005 226(5):773-8.
Evaluation of risk factors associated with development of postoperative ileus in horses.
Cohen ND, Lester GD, Sanchez LC, Merritt AM, Roussel AJ Jr
J Am Vet Med Assoc. 2004 225(7):1070-8.
Evaluation of urine sucrose concentration for detection of gastric ulcers in horses.
O'Conner MS, Steiner JM, Roussel AJ, Williams DA, Meddings JB, Pipers F, Cohen ND
Am J Vet Res. 2004 65(1):31-9.
Evaluation of the effects of penicillin G potassium and potassium chloride on the motility of the large intestine in horses.
Roussel AJ, Hooper RN, Cohen ND, Bye AD, Hicks RJ, Schulze JL
Am J Vet Res. 2003 64(11):1360-3.
Evaluation of acetaminophen absorption in horses with experimentally induced delayed gastric emptying.
Lohmann KL, Bahr A, Cohen ND, Boothe DM, Roussel AJ
Am J Vet Res. 2002 63(2):170-4.
Bacterial microflora of normal and telangiectatic livers in cattle.
Stotland EI, Edwards JF, Roussel AJ, Simpson RB
J Am Vet Med Assoc. 2001 219(1):36-9.
Effect of monensin sodium on histological lesions of naturally occurring bovine paratuberculosis.
Brumbaugh GW, Edwards JF, Roussel AJ Jr, Thomson TD
J Comp Pathol. 2000 123(1):22-8.
Prokinetic effects of erythromycin on the ileum, cecum, and pelvic flexure of horses during the postoperative period.
Roussel AJ, Hooper RN, Cohen ND, Bye AD, Hicks RJ, Bohl TW
Am J Vet Res. 2000 61(4):420-4.
Comparison of nuclear scintigraphy and acetaminophen absorption as a means of studying gastric emptying in horses.
Lohmann KL, Roussel AJ, Cohen ND, Boothe DM, Rakestraw PC, Walker MA
Am J Vet Res. 2000 61(3):310-5.
Clinical and pathologic features of cloned transgenic calves and fetuses (13 case studies).
Hill JR, Roussel AJ, Cibelli JB, Edwards JF, Hooper NL, Miller MW, Thompson JA, Looney CR, Westhusin ME, Robl JM, Stice SL
Theriogenology. 1999 51(8):1451-65.
Alterations in acid-base balance and serum electrolyte concentrations in cattle: 632 cases (1984-1994).
Roussel AJ, Cohen ND, Holland PS, Taliaoferro L, Green R, Benson P, Navarre CB, Hooper RN
J Am Vet Med Assoc. 1998 212(11):1769-75.
Tension band plating of an olecranon fracture in a bull.
Hague BA, Watkins JP, Hooper RN, Taylor TS, Roussel AJ
J Am Vet Med Assoc. 1997 211(6):757-8.
Immunization with Babesia bigemina rhoptry-associated protein 1 induces a type 1 cytokine response.
Ruef BJ, Tuo W, Rodriguez SD, Roussel AJ, Chitko-McKown CG, Palmer GH, McElwain TF, Canals A, Zarlenga DS, Gasbarre LC, Brown WC
J Interferon Cytokine Res. 1997 17(1):45-54.
High-sodium crystalloid solution for treatment of hypernatremia in a Vietnamese pot-bellied pig.
Banks P, Roussel AJ Jr, Mealey RH
J Am Vet Med Assoc. 1996 209(7):1268-70.
Catheterization of the auricular vein in cattle: 68 cases (1991-1994).
Roussel AJ Jr, Talioferra L, Navarre CB, Hooper RN
J Am Vet Med Assoc. 1996 208(6):905-7.
Indwelling cecal catheters for fluid administration in ponies.
Mealey RH, Carter GK, Roussel AJ, Ruoff WW
J Vet Intern Med. 1995 9(5):347-52.
Abomasal and duodenal motility in yearling cattle after administration of prokinetic drugs.
Roussel AJ, Brumbaugh GW, Waldron RC, Baird AN
Am J Vet Res. 1994 55(1):111-5.
Urinary indices of horses after intravenous administration of crystalloid solutions.
Roussel AJ, Cohen ND, Ruoff WW, Brumbaugh GW, Schmitz DG, Kuesis BS
J Vet Intern Med. 1993 7(4):241-6.
Alterations of fluid and electrolyte balance in thoroughbred racehorses following strenuous exercise during training.
Cohen ND, Roussel AJ, Lumsden JH, Cohen AC, Grift E, Lewis C
Can J Vet Res. 1993 57(1):9-13.
Myoelectric activity of the small intestine in enterotoxin-induced diarrhea of calves.
Roussel AJ, Woode GN, Waldron RC, Sriranganathan N, Jones MK
Am J Vet Res. 1992 53(7):1145-8.
Prophylactic effect of monensin sodium against experimentally induced paratuberculosis in mice.
Brumbaugh GW, Frelier PF, Roussel AJ Jr, Thomson TD
Am J Vet Res. 1992 53(4):544-6.
Type-I diabetes mellitus in a bull.
Kitchen DL, Roussel AJ Jr
J Am Vet Med Assoc. 1990 197(6):761-3.
Effect of flunixin meglumine on Escherichia coli heat-stable enterotoxin-induced diarrhea in calves.
Roussel AJ Jr, Sriranganathan N, Brown SA, Sweatt D
Am J Vet Res. 1988 49(8):1431-3.

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