JAMA : the journal of the American Medical Association
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To evaluate human immunodeficiency virus (HIV) type 1-specific cellular immune responses in HIV-seronegative health care workers with occupational high-risk exposures to HIV-infected (HIV-positive) patients. ⋯ Human immunodeficiency virus-specific T-helper activity was detected in six (75%) of eight HIV-negative health care workers with exposure to HIV-positive body fluids. Potent HIV-specific T-helper activity was detectable 4 to 8 weeks after the exposure and was lost in individuals followed up for 8 to 64 weeks. Three health care workers remained responsive at 8, 19, and 24 weeks. Exposure to HIV without evidence of subsequent infection appears to result in activation of cellular immunity without activation of antibody production.
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To describe the case characteristics of a series of patients poisoned with carbon monoxide (CO) resulting from indoor burning of charcoal briquets. ⋯ Carbon monoxide poisoning is a significant hazard from indoor use of charcoal briquets. All cases are avoidable and public awareness of the risk should be enhanced.