Estimated annual numbers of infectious intestinal disease (IID) cases in the community and presenting to general practices by organism, IID2 Study, UK 2008–2009
| Organism | Community | Presenting to GP | |||
| Cases | 95% CI | Cases | 95% CI | ||
| Bacteria | |||||
| C perfringens | A | 89 847 | 33 565 to 240 508 | 14 983 | 6981 to 32 157 |
| Campylobacter spp. | A | 571 949 | 369 936 to 884 276 | 78 973 | 55 486 to 112 401 |
| E coli O157 VTEC | A | 18 916 | 1339 to 267 201 | 824 | 120 to 5664 |
| Enteroaggregative E coli | D | 365 297 | 211 351 to 631 374 | 12 893 | 6501 to 25 567 |
| Salmonella spp. | A | 38 606 | 9968 to 149 529 | 11 291 | 4649 to 27 418 |
| Protozoa | |||||
| Cryptosporidium | B | 43 834 | 11 393 to 168 655 | 12 488 | 5232 to 29 805 |
| Giardia | B | 52 434 | 15 022 to 183 020 | 5617 | 1875 to 16 822 |
| Viruses | |||||
| Adenovirus | C | 630 251 | 417 285 to 951 906 | 52 106 | 30 219 to 89 845 |
| Astrovirus | D | 325 642 | 1 82 466 to 581 165 | 24 982 | 12 260 to 50 905 |
| Norovirus | D | 2 905 278 | 2 418 208 to 3 490 451 | 128 022 | 88 784 to 184 600 |
| Rotavirus | C | 783 737 | 539 535 to 1 138 466 | 83 850 | 54 868 to 128 141 |
| Sapovirus | D | 1 610 041 | 1 239 580 to 2 091 219 | 97 024 | 66 661 to 141 217 |
| All IID | 16 935 420 | 15 680 690 to 18 277 944 | 1 096 190 | 891 659 to 1 348 301 | |
A, culture; B, enzyme immunoassay; C, ELISA and/or PCR; D, PCR; VTEC, verocytotoxin-producing E coli.