TABLE 3.

Method agreement between culture for V. cholerae O1 bacterial counts (Gil et al., submitted) and direct PCR for total V. cholerae and V. cholerae O1 bacterial counts^a

PCR result	No. of samples negative for V. cholerae O1 by culture	No. of samples positive for V. cholerae O1 by culture	Total no. of samples
V. cholerae O1
Negative	8	5	13
Positive	17	3	20
Total	25	8
V. cholerae
Negative	17	0	17
Positive	25	8	33
Total	42	8

^aA sample was considered positive if any one of the three fractions was positive.