home *** CD-ROM | disk | FTP | other *** search
- Document 0015
- DOCN M9610015
- TI Instability of delayed-type hypersensitivity skin test anergy in human
- immunodeficiency virus infection.
- DT 9601
- AU Caiaffa WT; Graham NM; Galai N; Rizzo RT; Nelson KE; Vlahov D;
- Department of Epidemiology, Johns Hopkins School of Hygiene and; Public
- Health, Baltimore, MD, USA.
- SO Arch Intern Med. 1995 Oct 23;155(19):2111-7. Unique Identifier :
- AIDSLINE MED/96011571
- AB OBJECTIVE: To evaluate stability of delayed-type hypersensitivity (DTH)
- skin test over time in human immunodeficiency virus (HIV)-seropositive
- and HIV-seronegative injecting drug users. METHOD: A community-based
- cohort of injecting drug users who had serial skin testing with purified
- protein derivative tuberculin, mumps, and Candida albicans antigen.
- Delayed-type hypersensitivity anergy was defined as a skin test result
- of less than 3 mm for all three antigens; DTH positivity was a skin test
- result of 3 mm or greater for at least one antigen (Centers for Disease
- Control and Prevention, Atlanta, Ga, 1993). RESULTS: At baseline, 36% of
- HIV-seropositive subjects (n = 401) were anergic as compared with 14% of
- HIV-seronegative subjects (n = 552; P < .001). During follow-up, fewer
- HIV-seropositive subjects remained DTH positive (42%) and more remained
- anergic (19%) than of HIV-seronegative subjects (67% and 7%,
- respectively). Twenty-four percent of HIV-seropositive subjects who were
- initially DTH positive became anergic as compared with 15.3% of the
- HIV-seronegative subjects. However, the proportion changing from anergy
- to DTH positivity was greater among HIV-seropositive subjects (15%) than
- HIV-seronegative subjects (12%). In comparison to those who remained DTH
- positive, HIV-seropositive subjects with CD4 cell counts of less than
- 0.50 x 10(9)/L (odds ratio = 6.4) and less than 0.35 x 10(9)/L (odds
- ratio = 11.2) were more likely to remain anergic than those who had CD4
- cell counts above 0.50 x 10(9)/L or were HIV seronegative. CONCLUSIONS:
- Although the prevalence and incidence of DTH anergy were higher in
- HIV-seropositive subjects, high rates of change in DTH status occurred
- in both directions. This suggests that instability of DTH skin testing
- is substantial and only partially dependent on HIV status. Although a
- single test may be an unreliable indicator of HIV-induced
- immunosuppression, two consecutive anergic readings were strongly
- associated with a CD4 cell count below 0.50 x 10(9)/L and particularly
- below 0.35 x 10(9)/L. For determining false negativity of tuberculin
- tests, persistent DTH anergy is more reliable than a single test among
- HIV-seropositive injecting drug users. Anergy testing appears to be
- unnecessary with CD4 cell counts greater than 0.5 x 10(9)/L.
- DE Adult Aged Candida albicans/IMMUNOLOGY *Clonal Anergy Cohort Studies
- Cross-Sectional Studies CD4 Lymphocyte Count Human Hypersensitivity,
- Delayed/*IMMUNOLOGY HIV Infections/ETIOLOGY/*IMMUNOLOGY HIV
- Seropositivity/IMMUNOLOGY Middle Age Mumps/IMMUNOLOGY Odds Ratio
- Risk Factors Sensitivity and Specificity *Skin Tests Substance Abuse,
- Intravenous/COMPLICATIONS Support, U.S. Gov't, P.H.S. Tuberculin Test
- JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-