Lack of protection against feline immunodeficiency virus infection among domestic cats in New Zealand vaccinated with the Fel-O-Vax® FIV vaccine
| Autor: | Sayani Ghosh, Nicholas J. Cave, A. Stickney, Magdalena Dunowska |
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| Rok vydání: | 2020 |
| Předmět: |
Male
Feline immunodeficiency virus animal diseases viruses Buccal swab Immunization Secondary Biology Immunodeficiency Virus Feline Antibodies Viral Cat Diseases Microbiology Virus 03 medical and health sciences Feline Acquired Immunodeficiency Syndrome FIV vaccine Animals 030304 developmental biology Retrospective Studies 0303 health sciences CATS General Veterinary 030306 microbiology Vaccination Mouth Mucosa virus diseases Viral Vaccines General Medicine biochemical phenomena metabolism and nutrition Provirus biology.organism_classification Virology Cross-Sectional Studies Cats Female FIV infection New Zealand |
| Zdroj: | Veterinary microbiology. 250 |
| ISSN: | 1873-2542 |
| Popis: | Infections with feline immunodeficiency virus (FIV) are common in New Zealand, although the impact of those infections on the health status of the cats remains unclear. Although many cats are vaccinated yearly with a commercial FIV vaccine containing FIV subtypes A and D, the effectiveness of this vaccine in protection against infection with field FIVs is unclear, as a high proportion of New Zealand viruses belong to subtype C. The objective of the study was to compare the frequency of FIV infection among adult FIV-vaccinated and FIV-unvaccinated domestic cats with access to outdoors. Buccal swabs were collected by the participating veterinarians and tested for the presence of FIV provirus by quantitative PCR. Overall, 26/185 (14.0 %) samples were positive for FIV, including 7/82 (8.5 %) samples from FIV-unvaccinated and 19/103 (18.4 %) from FIV-vaccinated cats. There was no protective effect of vaccination on FIV infection among sampled cats (p = 0.05). Partial sequences of the FIV envelope gene from five New Zealand viruses were analysed by the maximum likelihood method. All clustered with other New Zealand FIV sequences from subtypes A (n = 2), C (n = 2) or putative recombinant viruses (n = 1). While the FIV vaccination did not prevent FIV infection among sampled cats, it may have had an impact on transmissibility of the virus or on disease progression. As neither was addressed in the current study, further research is needed to fully assess the potential benefits of FIV vaccination. Considering the frequency of FIV infection in FIV-vaccinated cats, FIV infection status should be monitored not only before the first vaccination, but before each yearly booster. |
| Databáze: | OpenAIRE |
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