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Flowchart for FeLV testing. Level 1 diagnostic testing may be sufficient in circumstances where the test results are consistent with patient signalment and clinical signs. Level 2 diagnostic testing is recommended as confirmatory testing or in cases where further clarification of the patient’s infection status is needed.
Courtesy of Dr. Kelly St. Denis. Adapted from Little S, Levy J, Hartman K, et al. 2020 AAFP Feline Retrovirus Testing and Management Guidelines. J Feline Med Surg 2020;22(1):5-30.