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Allen Roussel

Department Head of Large Animal Clinical Services & Professor of Large Animal Internal Medicine


Phone: (979) 845-9127

Office: VLAH 208

Mailstop: 4475

Department: VLCS

Photo of Roussel, Allen


    • Serving on a PhD jury in France
    • Serving on the Examination Committee of the European College of Bovine Health Management held in Germany.
    • Previously I spent 2 sabbaticals in France and helped with a study abroad course in Germany.


  • M.S. , Purdue University 1984
  • D.V.M. , Louisiana State University 1977


  • Diplomate, American College of Veterinary Internal Medicine, 1985

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.


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 Oct; 91(2-4):280-4.
PMID: 19625094 [PubMed - indexed for MEDLINE]
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 Oct; 91(2-4):226-33.
PMID: 19577813 [PubMed - indexed for MEDLINE]
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 Jan; 234(2):249-52.
PMID: 19210247 [PubMed - indexed for MEDLINE]
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 Aug; 86(1-2):1-7.
PMID: 18406483 [PubMed - indexed for MEDLINE]
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 Apr; 84(1-2):121-34.
PMID: 18206254 [PubMed - indexed for MEDLINE]
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 May; 129(1-2):131-8.
PMID: 18055137 [PubMed - indexed for MEDLINE]
Evaluation of the ruminant serum chemistry profile.
Russell KE, Roussel AJ.
Vet Clin North Am Food Anim Pract. 2007 Nov; 23(3):403-26, v.
PMID: 17920455 [PubMed - indexed for MEDLINE]
Environmental mycobacteria in soil and water on beef ranches: association between presence of cultivable mycobacteria and soil and water physicochemical characteristics.
Norby B, Fosgate GT, Manning EJ, Collins MT, Roussel AJ.
Vet Microbiol. 2007 Sep; 124(1-2):153-9.
PMID: 17512144 [PubMed - indexed for MEDLINE]
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 Mar; 230(6):896-901.
PMID: 17362168 [PubMed - indexed for MEDLINE]
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 Mar; 230(6):890-5.
PMID: 17362167 [PubMed - indexed for MEDLINE]
Are feeding practices associated with duodenitis-proximal jejunitis?
Cohen ND, Toby E, Roussel AJ, Murphey EL, Wang N.
Equine Vet J. 2006 Nov; 38(6):526-31.
PMID: 17124842 [PubMed - indexed for MEDLINE]
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 Sep; 67(9):1484-90.
PMID: 16948590 [PubMed - indexed for MEDLINE]
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 Nov; 227(9):1476-9, 1418.
PMID: 16279394 [PubMed - indexed for MEDLINE]
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 Jul; 88(7):2432-40.
PMID: 15956306 [PubMed - indexed for MEDLINE]
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 Apr; 66(4):642-5.
PMID: 15900945 [PubMed - indexed for MEDLINE]
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 Mar; 226(5):773-8.
PMID: 15776952 [PubMed - indexed for MEDLINE]
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 Oct; 225(7):1070-8.
PMID: 15515986 [PubMed - indexed for MEDLINE]
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 Jan; 65(1):31-9.
PMID: 14719699 [PubMed - indexed for MEDLINE]
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 Nov; 64(11):1360-3.
PMID: 14620770 [PubMed - indexed for MEDLINE]
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 Feb; 63(2):170-4.
PMID: 11843113 [PubMed - indexed for MEDLINE]
Bacterial microflora of normal and telangiectatic livers in cattle.
Stotland EI, Edwards JF, Roussel AJ, Simpson RB.
J Am Vet Med Assoc. 2001 Jul; 219(1):36-9.
PMID: 11439767 [PubMed - indexed for MEDLINE]
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 Jul; 123(1):22-8.
PMID: 10906252 [PubMed - indexed for MEDLINE]
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 Apr; 61(4):420-4.
PMID: 10772107 [PubMed - indexed for MEDLINE]
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 Mar; 61(3):310-5.
PMID: 10714524 [PubMed - indexed for MEDLINE]
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 Jun; 51(8):1451-65.
PMID: 10729073 [PubMed - indexed for MEDLINE]
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 Jun; 212(11):1769-75.
PMID: 9621887 [PubMed - indexed for MEDLINE]
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 Sep; 211(6):757-8.
PMID: 9301749 [PubMed - indexed for MEDLINE]
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 Jan; 17(1):45-54.
PMID: 9041471 [PubMed - indexed for MEDLINE]
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 Oct; 209(7):1268-70.
PMID: 8837648 [PubMed - indexed for MEDLINE]
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 Mar; 208(6):905-7.
PMID: 8617652 [PubMed - indexed for MEDLINE]
Indwelling cecal catheters for fluid administration in ponies.
Mealey RH, Carter GK, Roussel AJ, Ruoff WW.
J Vet Intern Med. 1995 Sep; 9(5):347-52.
PMID: 8531182 [PubMed - indexed for MEDLINE]
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 Jan; 55(1):111-5.
PMID: 7908180 [PubMed - indexed for MEDLINE]
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 Jul; 7(4):241-6.
PMID: 8246214 [PubMed - indexed for MEDLINE]
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 Jan; 57(1):9-13.
PMID: 8431806 [PubMed - indexed for MEDLINE]
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 Jul; 53(7):1145-8.
PMID: 1497182 [PubMed - indexed for MEDLINE]
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 Apr; 53(4):544-6.
PMID: 1586026 [PubMed - indexed for MEDLINE]
Type-I diabetes mellitus in a bull.
Kitchen DL, Roussel AJ Jr.
J Am Vet Med Assoc. 1990 Sep; 197(6):761-3.
PMID: 2211331 [PubMed - indexed for MEDLINE]
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 Aug; 49(8):1431-3.
PMID: 3052195 [PubMed - indexed for MEDLINE]

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