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J Parasitol. 2009 Oct;95(5):1129-33. doi: 10.1645/GE-2114.1. Epub 2009 Apr 22.

Seroprevalence of Toxoplasma gondii and concurrent Bartonella spp., feline immunodeficiency virus, and feline leukemia virus infections in cats from Grenada, West Indies.

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United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Beltsville, Maryland 20705-2350, USA.


Toxoplasma gondii and Bartonella spp. are zoonotic pathogens of cats. Feline immunodeficiency virus (FIV) and feline leukemia virus (FeLv) are related to human immunodeficiency virus, and human leukemia virus, respectively; all of these viruses are immunosuppressive. In the present study, the prevalence of antibodies to T. gondi, Bartonella spp., FIV, as well as FeLv antigen were determined in sera from 75 domestic and 101 feral cats (Felis catus) from the Caribbean island of Grenada, West Indies. Using a modified agglutination test, antibodies to T. gondii were found in 23 (30.6%) of the 75 pet cats with titers of 1:25 in 1, 1:50 in 3, 1:400 in 4, 1:500 in 12, 1:800 in 2, and 1:1,600 in 1, and 28 (27.7%) of 101 feral cats with titers of 1:25 in 4, 1:50 in 7, 1:200 in 4, 1:400 in 1, 1:500 in 3, 1:800 in 2, 1:1,600 in 3, and 1:3,200 in 4. Overall, in both pet and feral cats, the seroprevalence increased with age. Antibodies to Bartonella spp. were found in 38 (50.6%) of the 75 pet cats and 52.4% of 101 feral cats. Antibodies to FIV were found in 6 domestic and 22 feral cats. None of the 176 cats was positive for FeLv antigen. There was no correlation among T. gondii, Bartonella spp., and FIV seropositivity.

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