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Suwanagool, S. et al.

A comparative study of tuberculin skin test reactivity between asymptomatic HIV-1 seropositive subjects and healthy volunteers.

During November 1993-October 1994 tuberculin skin test reactivity (PPD-Thai Red Cross: 0.1 ml of 10 IU) was determined among 399 asymptomatic HIV-1 positive subjects and 405 healthy volunteers, 10% (40/399) had PPD- TRC induration 0-2 mm compared with 4.2% (17/405) (p = 0.001) and 43.4% (173/399) had induration > or = 10 mm compared with 53.8% (218/405) (p = 0.003) of healthy volunteers. However, the percentage of the PPD- TRC induration 5-9 mm was similar among HIV-1 seropositive subjects and healthy volunteers as 37.6% (150/399) vs 34.8% (141/405) (p = 0.4). The mean PPD- TRC reaction of HIV-seropositive subjects were 6.4 +/- 0.9 mm vs. 11.0 +/- 0.5 mm among those with CD4 lymphocyte counts 200-299 cells/mm3 compared with those > or = 300 cells/mm3 (p < 0.001). We provide support for use of induration of > or = 5 mm of PPD- TRC skin reaction for evidence of latent infection with Mycobacterium tuberculosis as the CDC recommendation in asymptomatic HIV-seropositive subjects. Consideration of tuberculosis chemoprophylaxis should have benefit, particularly in areas where M.tuberculosis is highly prevalent such as Thailand. However, among HIV-1 seropositive carriers with negative tuberculin ( PPD- TRC) skin tests, there needs to be a careful evaluation and follow-up for evidence of tuberculous infection.[1]

References

A comparative study of tuberculin skin test reactivity between asymptomatic HIV-1 seropositive subjects and healthy volunteers. Suwanagool, S., Chuenarom, V., Pechthanon, L., Sonjai, A., Leelarasamee, A., Pathrakom, C. Asian Pac. J. Allergy Immunol. (1995) [Pubmed]

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