title: HIV-1 infection in HIV-1 enzyme-linked immunoassay seronegative patients in Kinshasa, Zaire.
abstract: Serum samples of 62 African patients who had clinical manifestations of HIV-1 infection but were seronegative for HIV-1 by ELISA (Organon) were subsequently further tested by another HIV-1 ELISA test (Wellcozyme), HIV-1 IgG Western blot, HIV-1 antigen detection and HIV-2 ELISA. Patients' lymphocytes were cultured for HIV-1 and 2. Because of limited quantities of serum available all tests were not performed on all samples. Seven (26%) of 27 sera of patients meeting the WHO clinical case definition of AIDS were Western-blot-positive. In contrast, of 35 patients' sera with possible HIV related disease, only one (3%) was Western blot positive (P = 0.02) and none of 75 sera from HIV-1 ELISA (Organon) seronegative blood donors (P less than 0.01) were Western blot positive. Of 30 HIV-1 ELISA (Organon) seronegative patients tested with the HIV-1 ELISA Wellcozyme assay only one was seropositive (this patient's serum was also Western blot positive). Of 17 HIV-1 ELISA (Organon) seronegative patients tested, HIV-1 antigen was found in 1 case (6%) (this patient's serum was Western blot negative). None of the 34 patients tested by HIV-2 serology was HIV-2 seropositive. HIV-1 was isolated by culture in 3 (21%) of 14 HIV-1 ELISA seronegative patients (sera of the 3 patients were Western blot negative). In total, 12 (19%) of 62 HIV-1 ELISA (Organon) seronegative patients were found to be positive for HIV, either by Western blot HIV antigen testing or viral culture.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Projet SIDA, Department of Public Health, Kinshasa, Zaire.
authors.forename: R
authors.initials: R
authors.lastname: Colebunders
authors.forename: H
authors.initials: H
authors.lastname: Francis
authors.forename: M M
authors.initials: MM
authors.lastname: Duma
authors.forename: G
authors.initials: G
authors.lastname: van der Groen
authors.forename: I
authors.initials: I
authors.lastname: Lebughe
authors.forename: B
authors.initials: B
authors.lastname: Kapita
authors.forename: T C
authors.initials: TC
authors.lastname: Quinn
authors.forename: W L
authors.initials: WL
authors.lastname: Heyward
authors.forename: P
authors.initials: P
authors.lastname: Piot
mesh_terms: D015492:AIDS Serodiagnosis / Q000379:methods*; D000328:Adult; D015153:Blotting, Western; D015023:Democratic Republic of the Congo; D004797:Enzyme-Linked Immunosorbent Assay; D005188:False Negative Reactions; D005260:Female; D015488:HIV Antigens / Q000032:analysis; D006679:HIV Seropositivity / Q000175:diagnosis*; D015497:HIV-1; D006801:Humans; D008297:Male
chemical_list: D015488:HIV Antigens