Table 3.
Geometric mean (μ), maximum bacteria levels (max) and standard deviation (σ) are shown for household surfaces in Cambodia. Faecal coliform (FC), total coliform (TC), heterotrophic plate count (HPC) and Escherichia coli (EC) are shown in log units per 4 cm2. Values shown in bold represent the maximum concentration per column
| Fomite | FC | TC | ||||
|---|---|---|---|---|---|---|
| μ | Max | σ | μ | Max | σ | |
| Side of dipping ladle for sink water | 4·12 | 5·00 | 1·25 | 1·52 | 3·48 | 1·25 |
| Basin for washing | 2·90 | 4·00 | 0·97 | 3·38 | 5·04 | 1·80 |
| Counter top | 3·27 | 3·54 | 0·38 | 2·74 | – | – |
| Cutting board | 4·07 | 5·30 | 1·74 | 1·22 | 2·59 | 0·99 |
| Handle of ladle for anal cleansing | 3·26 | 6·78 | 3·09 | 1·58 | 3·00 | 1·05 |
| Top of toilet (squat style) | 4·08 | 4·15 | 0·11 | 2·34 | 4·04 | 1·61 |
| Floor surface around base of toilet | 3·80 | 4·60 | 1·13 | 1·80 | 4·01 | 1·23 |
| Bucket to retrieve water from well | 1·91 | 2·81 | 1·28 | 0·50 | 0·50 | 0·50 |
| Rim of well | 0·50 | – | – | 0·86 | 2·30 | 0·81 |
| Floor around well (well apron) | – | – | – | 3·27 | 5·02 | 1·51 |
| Fomite | HPC | EC | ||||
|---|---|---|---|---|---|---|
| μ | Max | σ | μ | Max | σ | |
| Side of dipping ladle for sink water | 5·13 | 6·00 | 0·99 | 0·50 | 0·50 | 0·50 |
| Basin for washing | 4·65 | 6·00 | 1·26 | 1·00 | 4·01 | 1·74 |
| Counter top | 4·96 | 5·62 | 0·93 | 1·92 | 2·92 | 1·67 |
| Cutting board | 5·38 | 5·84 | 0·49 | 0·27 | 1·35 | 0·60 |
| Handle of ladle for anal cleansing | 5·31 | 5·97 | 0·70 | 0·33 | 1·00 | 0·47 |
| Top of toilet (squat style) | 5·35 | 5·74 | 0·64 | 1·60 | 3·54 | 1·61 |
| Floor surface around base of toilet | 5·41 | 5·85 | 0·45 | 1·50 | 2·63 | 1·19 |
| Bucket to retrieve water from well | 5·00 | 5·77 | 0·82 | 0·50 | 0·50 | 0·50 |
| Rim of well | 5·06 | 5·72 | 0·61 | 0·50 | 0·50 | 0·50 |
| Floor around well (well apron) | 5·48 | 5·62 | 0·19 | 2·08 | 3·85 | 1·55 |