Table 2. Distribution of the number and percentage of health care products in which micro-organisms were detected, and average microbial load detected after alcohol disinfection in either previously cleaned products or otherwise, in experimental (efficiency) or field (effectiveness) conditions. São Paulo, SP, Brazil, 2013.
| Analyzed instruments Previous cleaning (N) | No. of instruments with detected microorganisms (%) | Bioburden | |||
|---|---|---|---|---|---|
| Effectiveness after alcohol disinfection Yes | 218 | 74 (33.9) | 1 to 170 CFU/instrument and 16 to 500 CFU/mL | ||
| No | 64 | 30 (46.9) | 1 to 100 CFU/instrument* | ||
| Efficiency after alcohol disinfection Yes | 30 | 11 (36.7) | 8 products (<50 CFU/instrument) and 3 products (>50 CFU/instrument) | ||
| No | 62† | 12 (19.4) | 2-54 CFU/mL‡ | ||
* Bioburden was only found in one of the four studies (E1). E1, E4, E6, and E12, which evaluated effectiveness of alcohol disinfection with no previous cleaning of products, found microorganism growth even after disinfection. One of the studies (E5) found no microorganisms after those decontamination procedures.
† The total number of analyzed instruments was not described in one of the five studies (E13). E9, E10, E12, and E13, which evaluated efficacy of alcohol disinfection with no previous cleaning of instruments, found microorganism growth even after disinfection.
‡ Bioburden was only found in one of the five studies (E8). E8, E9, E10, E12, and E13, which evaluated efficacy of alcohol disinfection with no previous cleaning of instruments, found microorganism growth even after those decontamination procedures.