TABLE 2.
Frequency of Prevotella bivia and black-pigmented Prevotella species before and after topical clindamycin therapy, stratified by clindamycin susceptibility
| Pretreatment culture or statistic | No. (%) of isolates positiveb for given organism/total no. of isolates | No. (%) of isolates resistant to clindamycin/total no. of isolatesb |
|---|---|---|
| P. bivia present | ||
| Clindamycin susceptible (n = 19) | 10/19 (52%) | 9/10 (90%) |
| Clindamycin resistant (n = 5) | 3/5 (60%) | 3/3 (100%) |
| P. bivia absent (n = 22) | 6/22 (27%) | 6/6 (100%) |
| P valuea | P = 0.2 | P = 0.6 |
| Black-pigmented Prevotella present | ||
| Clindamycin susceptible (n = 15) | 1/15 (7%) | 1/1 (100%) |
| Clindamycin resistant (n = 6) | 1/6 (17%) | 1/1 (100%) |
| Black-pigmented Prevotella absent (n = 20) | 11/20 (55%) | 10/11 (91%) |
| P valuea | P = 0.007 | P = 0.9 |
a
P values are from chi-square tests.
b
The numbers of positive and clindamycin-resistant cultures were determined 7 to 12 days posttreatment.