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  • Title: A phylogenetic study of Feline Immunodeficiency Virus (FIV) among domestic cats in Turkey.
    Author: Koç BT, Oğuzoğlu TÇ.
    Journal: Comp Immunol Microbiol Infect Dis; 2020 Dec; 73():101544. PubMed ID: 32911378.
    Abstract:
    Feline Immunodeficiency Virus (FIV) is the most prominent retrovirus in cats. Molecular studies on FIV are of great importance to enable further studies, for example, understanding the pathogenesis and developing improved vaccines. We aimed to elucidate the molecular status of FIV and provide a detailed characterization of FIV in Turkey because at present there is very limited information available in the literature. We also evaluated a potential link between clinical symptoms and FIV subtypes according to results obtained from molecular tests. Whole blood was collected from 200 client-owned domestic cats and molecular diagnosis and characterization was performed. The env, gag and vif gene regions were amplified and sequenced for phylogenetic analysis. We obtained specific amplicons based on bothenvand gag for FIV in 21 cats; only 2 of the 21 positive samples could also be characterized based on the vif gene region. Separate clusters were identified according to previously determined genotyping strategies; however, they were observed in FIV subtype B. The molecular findings of some individual cats were evaluated in conjunction with their clinical symptoms in an attempt to determine potential relationships between the genetic characteristics of FIV and symptoms of disease. As a result, overexpression of the vif gene could be important in leading to serious clinical symptoms. Our results emphasize the necessity of considering FIV in diagnosis and performing the neccesary diagnostics to confirm or rule out FIV infection. The molecular dynamics of FIV should be periodically updated by further analyses to establish a successful prevention strategy.
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