Table 2.

Frequency distribution of the first positive specimen for patients from whom three or more specimens were collected for AFB smear and culture

Collection order of specimenNo. of patients (%) that were:
EitheraSmear positivebSmear negative
SmearCulture
First80 (67)41 (73)41 (73)39 (61)
Second33 (28)8 (14)11 (20)22 (34)
Third7 (5)4 (7)4 (7)3 (5)
Fourth or later0 (0)3 (6)0 (0)0 (0)
  • a Numbers are for the first culture-positive specimens for all patients, both smear positive and smear negative.

  • b At least one specimen obtained from each member of this group of patients was smear positive.