Cummings School of Veterinary Medicine at Tufts University
Joyce S. Knoll

Associate Professor and Associate Chair

Hematology, Cytology, Clinical Endocrinology, Clinical Pathology
Clinical Pathology Laboratory Director

Campus Phone:



  • VMD - University of PA - 1984
  • PhD - University of PA - 1987

Board Certification

  • ACVP (Clinical Pathology Specialty)
  1. Mayer J, Knoll J, Wrubel K, Mitchell MA Characterizing the Hematologic and Plasma Chemistry Profiles of Captive Crested Geckos (Rhacodactylus ciliatus) Journal of Herpetological Medicine and Surgery Volume 21, No. 2-3, 2011 pp.1-8.
  2. Gunn-Christie, R, Flatland, B, Friedrichs, KR, Szladovits, B, Harr, KE, Ruotsalo, K, Knoll, JS, Wamsley, HL, Freeman, KP. ASVCP quality assurance guidelines: control of preanalytical , analytical, and postanalytical factors for urinalysis, cytology, and clinical chemistry in veterinary laboratories. Vet Clin Pathol 41(1):18-26, 2012.
  3. Watson, AT, Penninck D, Knoll, JS, Keating JH, Sutherland-Smith J. Safety and correlation of test results of combined ultrasound-guided fine needle aspiration and needle core biopsy of the canine spleen.  Veterinary Radiology & Ultrasound: 52(3):317-22, 2011.
  4. Lanaux, T, Rozanski, E, Simoni, R, Price, L, Buckley, G, Stockman, C, Knoll, J. 2011. Interpretation of canine and feline blood smears by emergency room personnel" Vet Clin Pathol 40(1):18-23
  5. Vaden SL, Knoll JS, Smith FWK, Tilley LP (eds). Blackwell’s Five-Minute Veterinary Consult: Lab Tests and Diagnostic Procedures, 2009 Wiley-Blackwell, Ames.
  6. Knoll, J.S., and S.L. Rowell. 1996. Clinical Hematology. In-Clinic Analysis, Quality Control, Reference Values, and System Selection. In: Vet Clinics of N.A., Sm An Prac 26:981-1001.
  7. Couetil, L., M.R. Paradis, J.S. Knoll. 1996. Adrenocorticotropin (ACTH) concentration in healthy horses and in horses with clinical signs of hyperadrenocorticism. J Vet Intern Med 10:1-6.
  8. Knoll, J.S., 2000. Clinical Automated Hematology Systems. In: Schalms Veterinary Hematology, 5th edition. Feldman, BF., Zinkl JG, and Jain, NC (eds). Williams & Wilkins, Baltimore.
  9. Mayer, J., Knoll, J., and Innis, C. 2005. Characterizing the hematologic and plasma chemistry profiles of captive Chinese water dragons (Physignathus cocininus). J Herp Med Surg 15:16-23.
  10. Shinohara, N., MacGregor, J.M., Calo, A., Rush, J.E., Penninck, D.G., Knoll, J.S. 2005. Presumptive, primary cardiac lymphoma in a cat causing pericardial effusion. J. Vet. Cardiology 7:65-69.

General Research Interests

I am interested in veterinary hematology, cytology and clinical endocrinology. Previous investigations focused on clinical application and validation of diagnostic tests and/or instrumentation for use with veterinary specimens. I played a role in validation of an ACTH assay for diagnosis of hyperadrenocorticism in horses and ponies. I have also evaluated several automated hematology instruments and some automated hormone assays using a chemiluminescent based system. More recently I have been focused on development of innovative teaching techniques.

Major Specialized Equipment

  • Cobas c501 (Roche)
  • Advia 120 Hematology Analyzer
  • Start4 Coagulation Analyzer

Laboratory Personnel

  • Cheryl Stockman, Laboratory Supervisor
  • Tammi Frank, Medical Technologist
  • Ann Blasotto, Medical Technologist
  • Beth Underwood, Medical Technologist
  • Dianne Noyes, Medical Technologist
  • Christine St. Cyr, Medical Technologist

Specialized Capabilities or Interests

  • Hematology, Cytology, and Urinalysis
  • Continuing Education (Laboratory and on-line courses)
  • Veterinary Clinical Chemistry