Effects of orally administered raltegravir in cats with experimentally induced ocular and respiratory feline herpesvirus-1 infection
2019
Spertus, Chole B. | Pennington, Matthew R. | Van de Walle, Gerlinde R. | Badanes, Zachary I. | Judd, Bonnie E. | Mohammed, Hussni O. | Ledbetter, Eric C.
OBJECTIVE To determine the effects of orally administered raltegravir in cats with experimentally induced ocular and respiratory feline herpesvirus-1 (FHV-1) infection. ANIMALS 14 healthy 6-month-old unvaccinated specific pathogen–free cats. PROCEDURES On day 0, all cats were experimentally inoculated by topical application of 0.1 mL of a solution containing 106 plaque-forming units of FHV-1 strain FH2CS to the inferior conjunctival fornix of each eye. Cats were randomly assigned to receive either raltegravir (80 mg; n = 7) or lactose (250 mg; vehicle; 7), PO, every 12 hours for 14 days beginning on day 1. Cats were assigned clinical ocular and respiratory disease scores every other day from days 0 to 30. Conjunctival swab specimens were collected for detection of FHV-1 by virus isolation and real-time PCR assay at 3-day intervals from days 0 to 30. Confocal microscopy was performed on days 0 and 10 to assess corneal epithelial leukocyte infiltration. The assessed variables and duration of FHV-1 shedding were compared between the 2 treatment groups. RESULTS Cats in both groups developed moderate to severe conjunctivitis and ulcerative keratitis characteristic of FHV-1 infection. Median duration of FHV-1 shedding was shorter and signs of ocular and respiratory disease were less severe for raltegravir-treated cats than for vehicle-treated cats. However, the mean conjunctival FHV-1 titer and corneal epithelial leukocyte count did not differ between the 2 groups. CONCLUSIONS AND CLINICAL RELEVANCE Results suggested orally administered raltegravir might be effective for alleviation of ocular and respiratory signs of FHV-1 infection in cats.
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