New Bolton Center Kennett Square, PA
Emergencies & Appointments:
Ryan Hospital Philadelphia, PA


Assistant Professor of Large Animal Medicine and Neurology , University of Pennsylvania, New Bolton Center, Kennett Square, PA

Diplomate, American College of Veterinary Internal Medicine - Large Animal

Diplomate, American College of Veterinary Internal Medicine - Neurology

Clinical Specialties: Large Animal Internal Medicine and Neurology
Research Areas: Large animal neurology, equine neurology, bovine neurology, camelid neurology, small ruminant neurology, porcine neurology, Clostridium botulinum type B and botulism, Sarcocystis neurona, equine protozoal myeloencephalitis, Borrelia burgdorferi, Lyme neuroborreliosis

Contact Information:
University of Pennsylvania
School of Veterinary Medicine
Dept of Clinical Studies
New Bolton Center
382 West Street Road

Large Animal Internal Medicine & Neurology

Botulism, Neurology, Equine protozoal myeloencephalitis (EPM). Lyme neuroborreliosis

Bedenice D, Johnson AL Neurologic conditions affecting the equine athlete Vet Clin North Am Equine Pract 34: 277-297, 2018.

Mittelman N, Stefanovski D, Johnson AL Utility of C-reactive protein and serum amyloid A in the diagnosis of equine protozoal myeloencephalitis J Vet Intern Med : , 2018.

Schale S, Howe D, Yeargan M, Morrow JK, Graves A, Johnson AL*. Protozoal coinfection in horses with equine protozoal myeloencephalitis in the eastern United States J Vet Intern Med 32: 1210-1214, 2018.

Burke MJ, Tomlinson JE, Blikslager AT, Johnson AL, Dallap-Schaer BL Evaluation of digital cryotherapy using a commercially available sleeve style ice boot in healthy horses and horses receiving i.v. endotoxin Equine Vet J : , 2018.

Divers TJ, Gardner RB, Madigan JE, Witonsky SG, Bertone JJ, Swinebroad EL, Schutzer SE, Johnson AL Borrelia burgdorferi infection and Lyme disease in North American horses: a consensus statement J Vet Intern Med 32: 617-632, 2018.

Johnson AL, Johnstone LK, Stefanovski D Cerebrospinal fluid Lyme multiplex assay results are not diagnostic in horses with neuroborreliosis J Vet Intern Med 32: 832-838, 2018.

Parkinson NJ, McKenzie HC, Barton MH, Davis JL, Dunkel B, Johnson AL, MacDonald ES Catheter-associated venous air embolism in hospitalized horses: 32 cases J Vet Intern Med 32: 805-814, 2018.

Intan-Shameha AR, Divers TJ, Morrow JK, Graves A, Olsen E, Johnson AL, Mohammed HO Phosphorylated neurofilament H (pNF-H) as a potential diagnostic marker for neurological disorders in horses Res Vet Sci 114: 401-405, 2017.

Setlakwe E, Johnson AL*. Acute encephalopathy in a 2-year-old pot-bellied pig following accidental intoxication with clonazepam. J Vet Emerg Crit Care : , 2017.

Mittelman NS, Divers TJ, Engiles JB, Gerhold R, Ness S, Scrivani PV, Southard T, Johnson AL*. Parelaphostrongylus tenuis cerebrospinal nematodiasis in a horse with cervical scoliosis and meningomyelitis. J Vet Intern Med : , 2017.

BA University of Pennsylvania, 1999

DVM Cornell University College of Veterinary Medicine, 2003