Volume 12, Number 10—October 2006
Research
Campylobacter jejuni Multilocus Sequence Types in Humans, Northwest England, 2003–2004
Will Sopwith*
, Andrew Birtles†, Margaret Matthews†, Andrew Fox†, Steven Gee‡, Michael Painter*, Martyn Regan*, Qutub Syed*, and Eric Bolton†
, Andrew Birtles†, Margaret Matthews†, Andrew Fox†, Steven Gee‡, Michael Painter*, Martyn Regan*, Qutub Syed*, and Eric Bolton†
Table 3
Comparative age distributions of the most common MLST clonal complexes by study area (first year of the study)*
| Clonal complex | Age group | Isolates |
Incidence/100,000 |
Incidence ratio | 95% confidence intervals | p value | ||
|---|---|---|---|---|---|---|---|---|
| Rural | Suburban | Rural | Suburban | |||||
| ST–21 | 0–14 | 2 | 14 | 6.65 | 17.68 | 0.38 | 0.04–1.64 | – |
| 15–34 | 9 | 24 | 24.27 | 21.02 | 1.15 | 0.47–2.57 | – | |
| 35–54 | 12 | 18 | 24.38 | 15.14 | 1.61 | 0.71–3.53 | – | |
| >55 | 13 | 13 | 20.17 | 11.43 | 1.76 | 0.75–4.13 | – | |
| ST–45 | 0–14 | 3 | 1 | 9.97 | 1.26 | 7.89 | 0.63–414.40 | – |
| 15–34 | 1 | 4 | 2.70 | 3.50 | 0.77 | 0.02–7.78 | – | |
| 35–54 | 7 | 6 | 14.22 | 5.05 | 2.82 | 0.81–10.15 | – | |
| >55 | 10 | 3 | 15.51 | 2.64 | 5.88 | 1.51–33.24 | <0.01 | |
| ST–257 | 0–14 | 2 | 1 | 6.65 | 1.26 | 5.26 | 0.27–310.48 | – |
| 15–34 | 1 | 8 | 2.70 | 7.01 | 0.38 | 0.01–2.87 | – | |
| 35–54 | 3 | 8 | 6.09 | 6.73 | 0.91 | 0.15–3.77 | – | |
| >55 | 4 | 4 | 6.21 | 3.52 | 1.76 | 0.33–9.47 | – | |
| ST–443 | 0–14 | 1 | 0 | 3.32 | 0.00 | – | – | – |
| 15–34 | 3 | 5 | 8.09 | 4.38 | 1.85 | 0.29–9.50 | – | |
| 35–54 | 0 | 6 | 0.00 | 5.05 | – | – | – | |
| >55 | 1 | 6 | 1.55 | 5.28 | 0.29 | 0.01–2.42 | – | |
| ST–48 | 0–14 | 1 | 2 | 3.32 | 2.53 | 1.32 | 0.02–25.27 | – |
| 15–34 | 5 | 7 | 13.48 | 6.13 | 2.20 | 0.55–8.05 | – | |
| 35–54 | 0 | 4 | 0.00 | 3.36 | – | – | – | |
| >55 | 1 | 2 | 1.55 | 1.76 | 0.88 | 0.01–16.94 | – | |
| ST–206 | 0–14 | 0 | 0 | 0.00 | 0.00 | – | – | – |
| 15–34 | 1 | 6 | 2.70 | 5.26 | 0.51 | 0.01–4.23 | – | |
| 35–54 | 5 | 5 | 10.16 | 4.21 | 2.42 | 0.56–10.49 | – | |
| >55 | 2 | 1 | 3.10 | 0.88 | 3.53 | 0.18–208.11 | – | |
| All cases | 0–14 | 19 | 29 | 63.13 | 36.62 | 1.72 | 0.91–3.18 | – |
| 15–34 | 48 | 87 | 129.45 | 76.20 | 1.70 | 1.17–2.44 | <0.01 | |
| 35–54 | 54 | 87 | 109.71 | 73.18 | 1.50 | 1.05–2.13 | 0.02 | |
| >55 | 57 | 66 | 88.43 | 58.05 | 1.52 | 1.05–2.20 | 0.02 | |
*Including all cases of campylobacteriosis reported for which age was available. Annual estimated incidences in 4 age groups were calculated for each clonal complex using estimates of the age-specific annual population for each local authority. Incidence ratios were calculated for rural incidence/suburban incidence and 95% confidence intervals calculated. Those data with a statistically significant difference between the study areas are shown in boldface type (level of significance p<0.05). MLST, multilocus sequence typing.
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