Résumé :
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[BDSP. Notice produite par INIST 6qm0QR0x. Diffusion soumise à autorisation]. Background This study aimed to evaluate purified protein derivative (PPD) reactivity and its interrelationship with anergy panel and CD4+lymphocytes in HIV-infected subjects as compared to PPD reactivity in HIV-uninfected individuals in a tuberculosis endemic and high Bacillus Calmette-Guérin (BCG) coverage environment. Methods Clients of four Mexico City HIV detection centres were screened for HIV-1 antibodies (ELISA or haemagglutination, Western Blot) ; reactivity to PPD (Mantoux PPD, 5TU RT-23), Candida (1 : 1000,0.1 ml), and tetanus toxoid (10Lf, 0.1 ml) ; and CD4+T cells. Active tuberculosis was excluded. Informed consent was obtained. Results From 5130 clients 1168 subjects were enrolled ; of these 801 (68.6%) were HIV positive. Reactivity to PPD among HIV-positive subjects was found in 174 (22%), 261 (32.6%), and 296 (37%), at PPD cutoff levels of >=10 mm, >=5 mm, and >=2 mm as compared to 224 (61%) of 367 HIV-negative individuals'reactors to PPD (>=10 mm) (P<0.001). After exclusion of anergic individuals using two cutoff levels for cutaneous allergens (<=2 mm and <=5 mm), PPD reactivity between HIV-infected and uninfected individuals continued to be significantly different. Only HIV-infected individuals with CD4+T cells >=500 cells/mm3 had similar reactivity to PPD as HIV-uninfected individuals. Variables associated with PPD reactivity were CD4+T cell counts, BCG scar, HIV infection and age. (...)
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