Impaired antibody responses and loss of reactivity to Onchocerca volvulus antigens by HIV-seropositive onchocerciasis patients.

Abstract:

:The impact of concomitant human immunodeficiency virus (HIV) infection on the antibody response of onchocerciasis patients to Onchocerca volvulus antigens (OvAg) was studied by Western blotting and enzyme linked immunosorbent assay (ELISA). Immunoglobulin G (IgG) antibodies in sera from 45 HIV-sero-positive O. volvulus microfilariae (mf) carriers (HIV+/Ov+) recognized significantly fewer distinct O. volvulus antigenic bands, and responded less frequently to all detected bands compared to sera from 61 matched HIV-seronegative mf carriers (HIV-/Ov+). 29% of 31 follow-up sera from the HIV+/Ov+ patients failed to react to many of the antigenic bands recognized by initial sera from the same patients. Among 4 HIV+/Ov+ persons examined for total CD4+ cells, loss of reactivity corresponded with low CD4+ total cell counts. In an OvAg ELISA, sera from the HIV+/Ov+ individuals had significantly lower IgG+IgM antibody levels than sera from the HIV-/Ov+ persons, and the sensitivity of the assay was 87% for the HIV+/Ov+ subjects compared to 100% for those who were HIV-/Ov+. It is concluded that HIV-infected onchocerciasis patients exhibit significantly impaired antibody responses to O. volvulus antigens, and tend to lose their reactivity to these antigens over time due to immune response abnormalities caused by the concomitant HIV infection.

authors

Tawill SA,Gallin M,Erttmann KD,Kipp W,Bamuhiiga J,Büttner DW

doi

10.1016/s0035-9203(96)90488-5

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

85-9

issue

1

eissn

0035-9203

issn

1878-3503

journal_volume

90

pub_type

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