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Mark Johnson

Clinical Professor


Phone: (979) 845-9178

Mailstop: 4467

Department: VTPB

Photo of Johnson, Mark


  • D.V.M. Veterinary Medicine, Texas A&M University 1988
  • B.S. Veterinary Science, Texas A&M University 1986
  • B.S. Biomedical Science, Texas A&M University 1983


  • Diplomate of the American College of Veterinary Pathology: Clinical Pathology
  • Texas Veterinary Medical License: 6454

Scholarly Interests

Professional courses in pathology and service/teaching responsibilities including clinical pathology hospital service. Diagnostic and investigative immunopathology with emphasis on immunohistochemistry and immunocytochemistry interpretations for characterization of lymphoma and other neoplasia.


What is your diagnosis? Aspirate from a digit in a cat.
Vobornik S, Johnson M, Diesel A, Simpler R
Vet Clin Pathol. 2014 43(2):291-2.
Intracranial migration of Eucoleus (Capillaria) boehmi in a dog.
Clark AC, López FR, Levine JM, Cooper JJ, Craig TM, Voges AK, Johnson MC, Porter BF
J Small Anim Pract. 2013 54(2):99-103.
Oil Red O-positive lipid in peritoneal fluid from a horse with a rectal tear.
Brown JS, Johnson MC, Sims WP, Boone LH, Swor TM, Weeks BR
Vet Clin Pathol. 2011 40(2):265-9.
Clinical Technique: Amphibian Hematology: A Practitioners Guide
Heatley JJ, Johnson MC
J Exot Pet Med. 2009 18(1):14-19.
Toxicology Brief: Sodium Hypochlorite Bleach Ingestion in Two Dogs
Chapman S, Pittman J, Nabity M, Johnson M
Vet Med. 2008 103(1):13-18.
Mystery Leukocytosis
Wilcox A, Johnson M, Drourr L, Zoran D
Veterinary Forum. 2007
Intravascular hemolysis associated with severe cutaneous burn injuries in five horses.
Norman TE, Chaffin MK, Johnson MC, Spangler EA, Weeks BR, Knight R
J Am Vet Med Assoc. 2005 226(12):2039-43.
Hyperlipidemia Disorders in Dogs
Johnson, MC
Compend Contin Educ Pract Vet. 2005 27(5):361-370.
What is your diagnosis? Panosteitis.
Baird H, Kerwin SC, Henry G, Porterpan B, Johnson MC
J Am Vet Med Assoc. 2005 226(6):871-2.
Fine-needle aspirate cytology suggesting hepatic lipidosis in four cats with infiltrative hepatic disease.
Willard MD, Weeks BR, Johnson M
J Feline Med Surg. 1999 1(4):215-20.

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