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See Latest ArticlesIn-hospital contact investigation among health care workers after exposure to smear-negative tuberculosis
Journal of Occupational Medicine and Toxicology, 06/10/09
Ringshausen FC et al. - These findings suggest a low contagiosity of the particular index case. The frequency of positive QFT-GIT results may in fact reflect the pre-existing prevalence of latent TB infection among the study population. TB transmission seems unlikely and contact tracing not generally warranted after cumulative exposure <40 hours. However, the substantially lower frequency of positive QFT-GIT results compared to the TST may contribute to enhanced TB control in health care.
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