Abstract
Cat scratch disease, which is caused by infection with Rochalimaea henselae, is often manifested as lymphadenopathy. R. henselae has also been isolated from human immunodeficiency virus (HIV)-positive patients with bacillary angiomatosis. In order to determine the frequency of R. henselae-reactive antibodies in HIV-positive patients with persistent generalized lymphadenopathy (PGL) or non-Hodgkin's lymphoma (NHL), we tested a total of 124 HIV-positive patients for R. henselae-reactive immunoglobulin G (IgG), IgM, and IgA antibodies by an enzyme immunoassay procedure using whole R. henselae antigen. Of the patients, 7 had PGL, 17 had NHL, and 100 were HIV stage IV (Centers for Disease Control criteria). A total of 86% of PGL patients (6 of 7) were positive for R. henselae antibodies (three were positive for IgG, IgA, and IgM, one was positive for IgG and IgA only, and two were positive for IgG only). A total of 29% of NHL patients (5 of 17) were positive for R. henselae antibodies (two were positive for IgG, IgA, and IgM and three were positive for IgG only). Only 5% of HIV Stage IV patients without adenopathy (5 of 100) were positive for R. henselae-reactive IgG, IgA, and IgM. The high prevalence of R. henselae-reactive antibodies in HIV-positive PGL and NHL patients suggests that R. henselae is a potential etiologic agent or cofactor in these patients.
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