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M9610683.TXT
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1996-01-30
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Document 0683
DOCN M9610683
TI Preliminary evaluation of a Mycobacterium tuberculosis
lipooligosaccharide (LOS) antigen in the serological diagnosis of
tuberculosis in HIV seropositive and seronegative patients.
DT 9601
AU Daleine G; Lagrange PH; Service de Microbiologie, Hopital Saint-Louis,
Paris, France.
SO Tuber Lung Dis. 1995 Jun;76(3):234-9. Unique Identifier : AIDSLINE
MED/96014892
AB OBJECTIVE: To assess the value of detection of specific IgG or IgM
antibodies against three polar glycolipids of Mycobacterium tuberculosis
in HIV seropositive and seronegative patients with documented active
tuberculosis. DESIGN: Using an ELISA test, concentrations of IgM and IgG
antibodies against phenolic glycolipid Tb1 (PGL Tb1), 2.3 diacyl
trehalose (DAT) and polar lipooligosaccharide (LOS) were measured in the
serum of 36 patients with active tuberculosis: 16 tuberculosis patients
were coinfected with HIV (TB HIV+), and 20 were HIV seronegative (TB
HIV-). 104 control sera were tested: they were collected from 50 healthy
blood donors and from 54 asymptomatic HIV seropositive patients.
Specificity, sensitivity and predictive positive and negative values
were calculated. RESULTS: For the LOS antigen tested, sensitivity,
specificity and predictive positive value of specific IgG antibodies
were 75%, 95% and 84% respectively among the 36 tuberculosis patients.
No significant results were obtained either with the IgM against the LOS
antigen or with IgG against the DAT and PGL Tb1 antigens. Significant
sensitivity and positive predictive values were demonstrated only with
the ELISA test measuring specific IgG against the LOS antigen. The
sensitivity was greater in the TB HIV+ subgroup (94%) as compared with
the TB HIV- (60%) subgroup. These results were not related to different
potential factors such as the site of disease (pulmonary or
extrapulmonary) or by the acid-fast bacteria load as detected by the
smear microscopic (Ziehl-Neelsen) examination. CONCLUSIONS: The results
suggest that of the 3 antigens tested, only the LOS antigen is a
potential marker for detecting the development of tuberculosis in HIV
patients.
DE Antibodies, Bacterial/BLOOD Antigens, Bacterial/*BLOOD/IMMUNOLOGY
AIDS-Related Opportunistic Infections/*DIAGNOSIS Biological
Markers/ANALYSIS Enzyme-Linked Immunosorbent Assay/METHODS Human HIV
Seropositivity/*COMPLICATIONS IgG/*BLOOD IgM/*BLOOD
Immunohistochemistry Lipopolysaccharides/*BLOOD/IMMUNOLOGY
Mycobacterium tuberculosis/IMMUNOLOGY Tuberculosis/*DIAGNOSIS JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).