Table 6. Frequency of smear microscopy positive results of adult high-risk controls studied.

AFB-positive/total number of subjects tested per group (Percentage)
No TB patients	Health Care Workers	Healthy Family contacts	Cured TB patients
4/73 (5.5%) a)	0/123 (0.0%)	0/135 (0.0%)	0/90 (0.0%)

TB: tuberculosis; HIV: Human Immunodeficiency Virus; a) For comparison of the “no-TB group" with the “Health care group", or with “healthy family contacts" or “cured-TB patients" the p value were at least = 0.03; AFB: acid fast bacilli.