Clinical Pathology Laboratory

Submission of Samples 

Pathology SampleSamples received after 4 p.m. will be tested the next business day unless an after hours fee is charged. In-clinic patient testing is available on Saturdays at 8:30-9:30 a.m. Send-in/research samples are not processed on holidays or weekends.

Sample Submission

  • Please include a completed Clinical Pathology requisition form. Include the Veterinary clinic/ Veterinarian,  address, fax#, and telephone #.
  • Patient information should include full name, age, sex, species/breed and history.
  • All samples should be labeled with patient name.
  • Date of blood draw or sample collection should be on the form.
  • Samples preferably should be received same day or shipped overnight on a cold pack,  unless it is a slide cytology.
  • Serum, plasma samples should be separated from the RBCs.
  • An air dried differential slide should be made if a CBC is ordered. The slide should be protected from freezing/heat exposure and should not be packaged with formalin fixed tissues
  • NOTE: Ideally, shipping over the weekend or a holiday is not optimal for sample integrity. It is best to avoid this unless necessary.
  • Fluid cytologies, when possible, should have an air dried direct slide made to preserve cellular integrity.
  • Cytologies should include sample site or fluid type with description of the lesion.
  • Cytology samples should not be packaged with formalin fixed tissues.


Shipping Options

Mail Address
Washington State University
Veterinary Teaching Hospital
Clinical Pathology
P.O Box 647060
Pullman, WA 99164-7060

FedEx/UPS Address

Washington State University
Clinical Pathology
VTH Room 1402
Pullman, WA 99164-7060


In-Clinic patients: Clinical Pathology services for in house patients are charged to the patient account upon accessioning and are invoiced to the client at time of discharge. Any additional testing requested by the clinician on the case after discharge will be charged to the client and billed.

Send-in sample testing: The Clinical Pathology laboratory cannot receive samples sent in by the owner without an attending veterinarian on the case. The test results and billing will be given to the attending veterinarian. We can only give results to the attending veterinarian.

STAT requests include an additional fee and are not available for all tests. 

All fees are subject to change.

Saving Samples

Samples submitted to the Clinical Pathology Lab are saved for 1 week in the refrigerator. If additional testing is desired during this time, please notify the laboratory to determine if there is enough volume and sample integrity to run the test.  CSF serum titer samples are saved frozen for 3 months.  CSF titer samples are refrigerated for 1 month. Slides for cytologies are kept a minimum of 3 years.

Washington State University