Table 1.
Frequency of bacterial findings in samples from patients with chronic rhinosinusitis with nasal polyposis (CRSwNP), chronic rhinosinusitis without nasal polyposis (CRSsNP), and healthy controls
| Agent identified | Maxillary sinus culture (CRS) | Nares culture (CRS) | Nares culture (controls) | ||||
|---|---|---|---|---|---|---|---|
| CRSwNP (n = 24) | CRSsNP (n = 18) | Total (n = 42) | CRSwNP* (n = 24) | CRSsNP (n = 18) | Total (n = 42) | Controls (n = 57) | |
| Aerobic bacteria | |||||||
| CoNS** | 9 (38 %) | 9 (50 %) | 18 (43 %) | 10 (42 %) | 7 (39 %) | 17 (40 %) | 43 (75 %) |
| Staphylococcus aureus | 8 (33 %) | 7 (39 %) | 15 (36 %) | 14 (58 %) | 10 (56 %) | 24 (57 %) | 16 (28 %) |
| Haemophilus influenzae | 2 (8 %) | 1 (5.6 %) | 3 (7.1 %) | 0 | 1 (2 %) | ||
| Diphtheroid rods | 2 (8 %) | 2 (4.7 %) | 2 (8 %) | 2 (11 %) | 4 (9.5 %) | 4 (7 %) | |
| Pseudomonas sp | 0 | 1 (5.6 %) | 1 (2.3 %) | 0 | |||
| Moraxella sp | 0 | 1 (4 %) | 1 (2.3 %) | 0 | |||
| α-haemolytic streptococci | 1 (4 %) | 1 (2.3 %) | 1 (4 %) | 1 (5.6 %) | 2 (4.7 %) | 1 (2 %) | |
| Staphylococcus lugdunensis | 1 (4 %) | 1 (2.3 %) | 0 | 0 | |||
| Micrococcus sp | 0 | 0 | 1 (2 %) | ||||
| Streptococcus pneumoniae | 1 (4 %) | 1 (2.3 %) | 2 (8 %) | 2 (4.7 %) | 0 | ||
| Enterobacteriaceae*** | 2 (8 %) | 2 (4.7 %) | 3 (12.5 %) | 1 (5.6 %) | 4 (9.5) | 1 (2 %) | |
| Escherichia coli | 0 | 1 (4 %) | 1 (2.3 %) | 1 (2 %) | |||
| Anaerobic | |||||||
| Propionibacterium acnes | 1 (4 %) | 1 (2.3 %) | 0 | 0 | |||
| Anaerobic Gram-positive cocci | 1 (4 %) | 1 (2.3 %) | 0 | 0 | |||
* One culture is missing
** Coagulase-negative staphylococci (CoNS)
*** Except Escherichia coli