Incidence rates of infectious intestinal disease in the community and presenting to general practice by organism, Infectious Intestinal Disease 2 Study, UK 2008–9
| Organism | Test methods | Community | Presenting to GP | Ratio community/GP | ||||
| Cases* | PY† | Rate‡ (95% CI) | Cases* | PY† | Rate‡ (95% CI) | RR (95% CI) | ||
| Bacteria | ||||||||
| C perfringens | A | 7 | 4658.6 | 1.5 (0.5 to 3.9) | 78 | 312 232 | 0.24 (0.11 to 0.52) | 6.0 (1.7 to 20.9) |
| Campylobacter spp. | A | 43 | 4658.6 | 9.3 (6 to 14.3) | 400 | 312 232 | 1.28 (0.90 to 1.82) | 7.2 (4.1 to 12.7) |
| E | 51 | 4658.6 | 10.9 (7.4 to 15.9) | 693 | 312 232 | 2.22 (1.65 to 2.97) | 4.9 (3 to 7.9) | |
| E coli O157 (VTEC) | A | 1 | 4658.6 | 0.3 (0 to 4.3) | 4 | 312 232 | 0.01 (0.00 to 0.09) | 22.8 (0.9 to 610) |
| Enteroaggregative E coli | D | 28 | 4658.6 | 5.9 (3.4 to 10.2) | 66 | 312 232 | 0.21 (0.11 to 0.41) | 28.4 (11.8 to 68.2) |
| Salmonella spp. | A | 3 | 4658.6 | 0.6 (0.2 to 2.4) | 57 | 312 232 | 0.18 (0.08 to 0.44) | 3.4 (0.7 to 17.4) |
| E | 3 | 4658.6 | 0.6 (0.2 to 2.4) | 56 | 312 232 | 0.18 (0.07 to 0.44) | 3.5 (0.7 to 17.9) | |
| Protozoa | ||||||||
| Cryptosporidium | B | 3 | 4658.6 | 0.7 (0.2 to 2.7) | 65 | 312 232 | 0.20 (0.08 to 0.48) | 3.5 (0.7 to 17.6) |
| C | 6 | 4658.6 | 1.2 (0.4 to 3.9) | 80 | 312 232 | 0.25 (0.11 to 0.58) | 4.9 (1.2 to 20.6) | |
| Giardia | B | 4 | 4658.6 | 0.8 (0.2 to 3) | 29 | 312 232 | 0.09 (0.03 to 0.27) | 9.3 (1.8 to 49.2) |
| C | 9 | 4658.6 | 2.0 (0.7 to 5.6) | 35 | 312 232 | 0.11 (0.05 to 0.26) | 18.2 (4.8 to 69.6) | |
| Viruses | ||||||||
| Adenovirus§ | C | 48 | 4658.6 | 10.2 (6.8 to 15.4) | 265 | 312 232 | 0.84 (0.49 to 1.45) | 12.1 (6.1 to 23.9) |
| Astrovirus | D | 25 | 4658.6 | 5.3 (3 to 9.4) | 127 | 312 232 | 0.40 (0.20 to 0.82) | 13.1 (5.2 to 32.7) |
| Norovirus | D | 219 | 4658.6 | 47.0 (39.1 to 56.5) | 648 | 312 232 | 2.07 (1.44 to 2.99) | 22.7 (15.1 to 34.2) |
| Rotavirus§ | C | 59 | 4658.6 | 12.7 (8.7 to 18.4) | 424 | 312 232 | 1.36 (0.89 to 2.07) | 9.4 (5.3 to 16.5) |
| Sapovirus | D | 121 | 4658.6 | 26.1 (20.1 to 33.8) | 491 | 312 232 | 1.57 (1.08 to 2.29) | 16.6 (10.5 to 26.2) |
↵* Mean number of cases from 20 imputations.
↵† Person-years.
↵‡ Cases per 1000 person-years.
↵§ ELISA for adenovirus and rotavirus was conducted in specimens from patients aged <5 years.
A, culture; B, enzyme immunoassay; C, ELISA and/or PCR; D, PCR; E, culture and/or PCR; GP, general practice; VTEC, verotoxin-producing E coli.