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Felv epidemiology in los angeles cats: Appraisal of detection methods
Author(s) -
Gardner Murray B.,
Brown John C.,
Rongey Robert W.,
Dworsky Ruth,
Charman Howard P.,
Gilden Raymond V.,
Stephenson John R.,
Huebner Robert J.,
Hauser Duane E.,
Diegmann Frank,
Howard Edwin
Publication year - 1977
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.2910190420
Subject(s) - cats , feline leukemia virus , antibody , antigen , immunology , lymphoma , feline infectious peritonitis , biology , bone marrow , virology , medicine , pathology , disease , infectious disease (medical specialty) , covid-19
We investigated the reliability of the fixed cell indirect fluorescent antibody (IFA) peripheral blood smear test as an index of systemic infection with FeLV. Positive results with this test were found to correlate well with detectable FeLV p30 antigen in bone‐marrow smears by IFA, in serum and tissue by competition immunoassays, and with type‐C particles in bone marrow or spleen by electron microscopy. Most cats with lymphoma, anemia or infectious peritonitis were positive for FeLV and showed a poor or absent antibody response to FeLV p30, gp70, and FOCMA antigens. Most older cats with lymphoma, carcinoma, or sarcoma were negative for FeLV expression and also lacked these FeLV‐related antibodies. Detectable immunologic response to FeLV p30 and gp70 proteins and a high‐titered FOCMA antibody response were generally restricted to certain healthy cats exposed to FeLV. Antibody to endogenous RD‐114 viral p30 and gp70 was not detected in any of a large number of feline sera tested. The prevalence of FeLV‐related diseases and immunologic responses to FeLV in healthy cats was directly correlated with the degree of FeLV exposure. By using the IFA blood smear and FOCMA antibody tests one can monitor the horizontal spread of FeLV in multi‐cat households and accurately predict the FeLV disease susceptibility or resistance of individual cats in such environments.