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Int J Tuberc Lung Dis. 2000 Mar;4(3):275-7.

Association of prevalence of tuberculin reactions with closeness of contact among household contacts of new smear-positive pulmonary tuberculosis patients.

Author information

1
Jiyang Research Institute of Tuberculosis Control, Shandong, China.

Abstract

OBJECTIVES:

Among household contacts of newly diagnosed smear-positive pulmonary tuberculosis (TB) patients, to examine the association of apparent tuberculosis transmission with the closeness and duration of contact.

METHODS:

Household contacts of newly diagnosed patients with smear-positive pulmonary TB were identified, as well as a healthy population sample. Household contacts were categorized into three groups based on closeness, regularity, and duration of contact with index cases. All subjects underwent tuberculin testing.

RESULTS:

Among the household contacts, 47 of 112 (42%) of very close/intimate contacts had positive tuberculin tests, compared to 121 of 356 (34%) close/ regular contacts and 23 of 178 (13%) not close/sporadic contacts and 55 of 355 (16%) of a healthy population sample.

CONCLUSIONS:

Even among household contacts of smear-positive pulmonary TB patients, there were major differences in the proximity and duration of contact which were strongly associated with differences in the prevalence of positive tuberculin reactions.

PMID:
10751077
[Indexed for MEDLINE]

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