Table 1.
Distribution of Campylobacter capsular polysaccharide (CPS) types causing diarrheal illness in a pediatric population living in Abu Homos, Egypt, from 1995 to 2006
| Campylobacter species | Campylobacter jejuni capsule type | Primary infection | Nonprimary infection | All infections | hcp*+ |
|---|---|---|---|---|---|
| All | N/A† | 322 | 119 | 441 | 182/424 (42.9%) |
| Untypable | N/A† | 6 | 0 | 6 | 5/6 (83.3%) |
| Campylobacter coli | N/A† | 127 | 36 | 163 | 29/161 (18.0%) |
| C. jejuni | All | 189 | 83 | 272 | 148/257 (57.6%) |
| C. jejuni capsule type | NT‡ | 21 (11.1%) | 11 (13.3%) | 32 (11.8%) | 24/31 (77.4%) |
| HS1/44 | 10 (5.3%) | 5 (6.0%) | 15 (5.5%) | 8/13 (61.5%) | |
| HS2 | 19 (10.1%) | 12 (14.5%) | 31 (11.4%) | 9/27 (33.3%) | |
| HS3 | 22 (11.6%) | 9 (10.8%) | 31 (11.4%) | 26/29 (89.7%) | |
| HS4 | 18 (9.5%) | 4 (4.8%) | 22 (8.1%) | 11/21 (52.3%) | |
| HS5/31 | 9 (4.8%) | 10 (12.0%) | 19 (7.0%) | 7/17 (41.2%) | |
| HS6/7 | 12 (6.3%) | 5 (6.0%) | 17 (6.3%) | 5/17 (29.4%) | |
| HS8/17 | 1 (0.5%) | 0 (0.0%) | 1 (0.4%) | 1/1 (100.0%) | |
| HS9 | 3 (1.6%) | 1 (1.2%) | 4 (1.5%) | 2/2 (100.0%) | |
| HS10 | 12 (6.3%) | 6 (7.2%) | 18 (6.6%) | 12/18 (66.7%) | |
| HS12 | 1 (0.5%) | 0 (0.0%) | 1 (0.4%) | 1/1 (100.0%) | |
| HS15 | 18 (9.5%) | 7 (8.4%) | 25 (9.2%) | 11/25 (44.0%) | |
| HS18 | 1 (0.5%) | 0 (0.0%) | 1 (0.4%) | 1/1 (100.0%) | |
| HS19 | 4 (2.1%) | 0 (0.0%) | 4 (1.5%) | 1/4 (25.0%) | |
| HS22 | 8 (4.2%) | 1 (1.2%) | 9 (3.3%) | 9/9 (100.0%) | |
| HS23/36 | 9 (4.8%) | 2 (2.4%) | 11 (4.0%) | 9/11 (81.8%) | |
| HS41 | 5 (2.6%) | 1 (1.2%) | 6 (2.2%) | 1/6 (16.7%) | |
| HS42 | 8 (4.2%) | 4 (4.8%) | 12 (4.4%) | 2/11 (18.2%) | |
| HS52 | 0 (0.0%) | 1 (1.2%) | 1 (0.4%) | 0/1 (0.0%) | |
| HS53 | 8 (4.2%) | 4 (4.8%) | 12 (4.4%) | 8/12 (66.7%) |
Bold values indicate the two-tailed P value for Chi- square test of homogeneity, comparing C. coli to C. jejuni and untypable to C. jejuni, are both <0.001.
*
hcp, a genetic marker for the type 6 secretion system (denominator is different because not all isolates were available for hcp testing).
†
N/A = not applicable (i.e., not C. jejuni).
‡
NT = nontypeable C. jejuni capsule.