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Feline leukemia virus (FeLV) disease outcomes in a domestic cat breeding colony: Relationship to endogenous FeLV and other chronic viral infections


Powers, JA and Chiu, ES and Kraberger, SJ and Roelke-Parker, M and Lowery, I and Erbeck, K and Troyer, R and Carver, S and VandeWoude, S, Feline leukemia virus (FeLV) disease outcomes in a domestic cat breeding colony: Relationship to endogenous FeLV and other chronic viral infections, Journal of Virology, 92, (18) Article e00649-18. ISSN 0022-538X (2018) [Refereed Article]

Copyright Statement

Copyright 2018 American Society for Microbiology

DOI: doi:10.1128/JVI.00649-18


Exogenous feline leukemia virus (FeLV) is a feline gammaretrovirus that results in a variety of disease outcomes. Endogenous FeLV (enFeLV) is a replication-defective provirus found in species belonging to the Felis genus, which includes the domestic cat (Felis catus). There have been few studies examining interaction between enFeLV genotype and FeLV progression. We examined point-in-time enFeLV and FeLV viral loads, as well as occurrence of FeLV/enFeLV recombinants (FeLV-B), to determine factors relating to clinical disease in a closed breeding colony of cats during a natural infection of FeLV. Coinfections with feline foamy virus (FFV), feline gammaherpesvirus 1 (FcaGHV-1), and feline coronavirus (FCoV) were also documented and analyzed for impact on cat health and FeLV disease. Correlation analysis and structural equation modeling techniques were used to measure interactions among disease parameters. Progressive FeLV disease and FeLV-B presence were associated with higher FeLV proviral and plasma viral loads. Female cats were more likely to have progressive disease and FeLV-B. Conversely, enFeLV copy number was higher in male cats and negatively associated with progressive FeLV disease. Males were more likely to have abortive FeLV disease. FFV proviral load was found to correlate positively with higher FeLV proviral and plasma viral load, detection of FeLV-B, and FCoV status. Male cats were much more likely to be infected with FcaGHV-1 than female cats. This analysis provides insights into the interplay between endogenous and exogenous FeLV during naturally occurring disease and reveals striking variation in the infection patterns among four chronic viral infections of domestic cats.

Item Details

Item Type:Refereed Article
Keywords:endogenous, feline foamy virus, feline leukemia virus
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Virology
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Carver, S (Associate Professor Scott Carver)
ID Code:131480
Year Published:2018
Web of Science® Times Cited:38
Deposited By:Zoology
Deposited On:2019-03-19
Last Modified:2019-05-24

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