Table 1.
Prevalence data according to population and methodology of the study
| Author (year of publication) | Population characteristics | Diagnostic assay | Study type | Prevalence |
| Criscuoli (2004) | 42 pts with severe colitis | HE-ICH on rectal biopsy + antigenemia pp65 | prospective | 21% |
| Kishore (2004) | 63 pts with severe colitis (36 steroid resistant) | Serology-HE and qualitative PCR | prospective | 16% 22% |
| Wada (2003) | 47 pts with severe colitis | Antigenemia | prospective | 34% |
| de Saussure (2004) | 64 pts with active colitis | Serology-viremia-antigenemia- HE-ICH | prospective | 1.5%-6% |
| Vega (1999) | 267 active colitis | HE-ICH | retrospective | 3% |
| Pofelski (2005) | 48 pts severe colitis | Quantitative PCR on colonic biopsies | retrospective/ prospective | 38% 60% |
| Kambham (2004) | 40 pts steroid resistant (25 operated on for colectomy) | HE-ICH | retrospective | Overall 25% Operated on pts 24% |
| Papadakis (2001) | 1895 steroid resistant pts | HE | retrospective | 0.5% |
| Cottone (2001) | 19 Steroid resistant pts | HE-ICH on rectal biopsy + antigenemia pp65 | prospective | 36% |
| Maconi (2005) | 77 pts operated on for colectomy | HE-ICH on surgical specimen | prospective | 22% overall 27% steroid resistant |
| Takahashi (2004) | 69 surgical specimen of IBD pts | HE-ICH on biopsy and surgical specimen | retrospective | 11.5% |
| Alcalà (2000) | 39 pts operated on for colectomy | HE + ICH | retrospective | 18% |
| Eire-Brook (1986) | 26 pts operated on for colectomy | Light and electron microscopy- ICH | retrospective | 11.5% |
| Cooper (1977) | 46 pts operated on for colectomy | HE | retrospective | 13% |
| Rahbar (2003) | 23 pts with IBD (13 UC-10 CD) | ICH+ in situ hybridization | prospective | 92/100% |
| Wakefield (1992) | 50 pts with IBD (29 CD-21 UC) | qualitative PCR | prospective | 66/81% |