Thierry G. de Cristo , Giovana Biezus , Aline R. Maciel , Geanice Ledo , Mayara Vavassori , Ubirajara M. da Costa , Luiz C. Miletti , Renata A. Casagrande
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Immunocytochemistry of bone marrow aspirates: a tool in the diagnosis of feline leukemia virus infection in cats
Feline leukemia virus (FeLV) is a highly debilitating cat pathogen due to its ability to cause many pathological changes. Therefore, identifying the virus directly in bone marrow can be a highly relevant diagnostic tool even in the absence of viraemia. The aim of this study was to compare the diagnostic efficiency of immunocytochemistry (ICC) of bone marrow aspirates with enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR). Blood samples were collected from 188 cats and separated into aliquots of whole blood for nested PCR using the U3 LTR region and the gag gene of FeLV-A as reference and serum for detection of the p27 antigen by ELISA. Bone marrow samples from these cats were placed on silanized slides for anti-FeLV ICC using gp70 as primary antibody. A total of 28.2% of the cats tested for FeLV were positive in at least one of the tests, with 26.6% positive by PCR, 18.1% by ICC and 11.2% by ELISA. Cohen's kappa agreement test revealed moderate agreement between ELISA and PCR results and substantial agreement between ICC and ELISA and between ICC and PCR. The results indicated that ICC of bone marrow is an efficient novel diagnostic test for FeLV infection.
期刊介绍：
The Journal of Comparative Pathology is an International, English language, peer-reviewed journal which publishes full length articles, short papers and review articles of high scientific quality on all aspects of the pathology of the diseases of domesticated and other vertebrate animals.
Articles on human diseases are also included if they present features of special interest when viewed against the general background of vertebrate pathology.
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