Table 2.
Microbiological characteristics of S. pneumoniae isolates from 264 samples taken from 188 patients who underwent both nasopharyngeal and endotracheal sampling
| Characteristic | No. (%) with characteristica |
P valueb | |||
|---|---|---|---|---|---|
| NP | ET | NP+ET | Total | ||
| Positive samples | 5 (10) | 36 (72) | 9 (18) | 50 | |
| Serotypec | <0.05 | ||||
| 15A | 1 (20) | 2 (40) | 2 (40) | 5 | |
| 17F | 2 (28) | 5 (72) | 0 | 7 | |
| 19Fd | 1 (8) | 9 (69) | 3 (23) | 13 | |
| 23Fd | 1 (5) | 17 (85) | 2 (10) | 20 | |
| Penicillin nonsusceptible | 3 (9) | 26 (72) | 7 (19) | 36 | NSe |
| Cefotaxime nonsusceptible | 0 | 7 (87) | 1 (13) | 8 | NS |
| Ofloxacin nonsusceptible | 2 (6) | 26 (76) | 6 (18) | 34 | NS |
a
NP, isolation in nasopharyngeal sample alone; ET, isolation in endotracheal sample alone; NP+ET, isolation in both samples.
b
χ2 test was used for all analyses.
c
Additional serotypes: 15B (n = 1, NP culture), 6A (n = 2, NP and ET cultures), nontypeable (n = 3, ET culture).
d
Two S. pneumoniae serotypes, 19F and 23F from NP and ET cultures, respectively, were isolated in a single patient.
e
NS, not significant.