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Parasitology lab members hold jars filled with specimen


Haemaphysalis longicornis (Asian longhorned tick) identified in TN
The invasive Asian longhorned tick (Haemaphysalis longicornis) has been identified from dogs, cattle, and deer (1) in 8 counties in TN. Haemaphysalis longicornis is a known vector of significant human and animal pathogens in its home range, but its significance as a vector of disease in the United States requires further investigation. The tick feeds on a wide variety of hosts including humans and many other domestic and wild animals and can expand its population rapidly and establish an infestation parthenogenetically (without male fertilization). Ticks were noted on necropsy by UTCVM pathologists or submitted for identification by local veterinarians and identified by the UTCVM Diagnostic Parasitology Laboratory, Dr. Rebecca Trout-Fryxell (UTIA medical and veterinary entomologist), and confirmed by the NVSL. Collaborative monitoring efforts by UTIA, UTCVM, TWRA, and the USDA are ongoing to evaluate the extent of the tick’s range in Tennessee. Ticks may be submitted to the UTCVM Diagnostic Parasitology Laboratory for parasite external identification.
Please visit the Tennessee Department of Agriculture for further details on Haemaphysalis longicornis.

Toxoplasma gondii ELISA testing

We are excited to announce that the ELISA (Enzyme-linked Immunosorbent Assay) for the detection of anti-Toxoplasma gondii IgG antibodies replaced the current MAT test in the UTCVM Diagnostic Parasitology Laboratory November, 1, 2023. This new test reduces the subjectivity of test interpretation by the use of a plate reader and internal verification testing has shown good overall agreement with previous MAT results. Download the Toxoplasma ELISA handout for more information.

Parasitology lab members stand in blue lab coats with parasite samples

Services Provided

The UTCVM Parasitology Laboratory provides several test panels to provide better service and to our clients and their patients while keeping costs reasonable. Below is more information about our fecal and heartworm panels so that you can choose your test wisely.

Parasitology Submission Form

Fecal Testing

  • The small animal fecal panels broaden the spectrum of detection for intestinal parasites. Please see the download for a detailed reference. Fecal Testing

Heartworm Testing

  • Comprehensive heartworm panels improve the sensitivity of heartworm testing with an additional Knott’s test evaluation for the presence of microfilariae. This standard is endorsed by the American Heartworm Society and Companion Animal Parasite Council and provides enhanced quality care for your patients. Heartworm Testing 

Contact Information

Telephone Numbers and Email


  • 8:00 AM- 5:00 PM (EST)
  • Monday – Friday

Shipping Address

  • UTCVM Parasitology Laboratory
  • Biomedical and Diagnostic Sciences
  • 2407 River Drive, Room A233
  • Knoxville, TN 37996-4543