Table 3.
Concentration of E. coli, Salmonella spp., G. lamblia and C. parvum in wastewater samples.
| Pathogens and locations | Mean | SD | Min | Max | P-value |
|---|---|---|---|---|---|
| E. coli (LogCFU/100 ml) | |||||
| Pig pen outlet | 7.7 | 0.9 | 5.0 | 8.7 | Ref |
| Household outlet | 7.1 | 0.8 | 5.0 | 8.7 | .03 |
| Communal drainages | 7.1 | 1.0 | 5.4 | 9.3 | .03 |
| Agricultural field | 5.0 | 0.9 | 3.0 | 6.3 | <.01 |
| Salmonella spp. (MPN/100 ml) | |||||
| Pig pen outlet | 2497 | 4540 | 30 | 11000 | Ref |
| Household outlet | 164 | 263 | 30 | 930 | .10 |
| Communal drainages | 1441 | 1966 | 30 | 4600 | .52 |
| Agricultural field | 379 | 822 | 30 | 2400 | .09 |
| G. lamblia (Cyst/100 ml) | |||||
| Pig pen outlet | 136 | 229 | 4 | 400 | NA |
| Household outlet | 28 | 0 | 0 | 28 | NA |
| Communal drainages | 5.3 | 2.3 | 4 | 8 | NA |
| Agricultural field | 12 | 0 | 0 | 12 | NA |
| C. parvum (Cyst/100 ml) | |||||
| Pig pen outlet | 32 | 0 | 0 | 32 | NA |
| Household outlet | 0 | 0 | 0 | 0 | NA |
| Communal drainages | 8 | 0 | 0 | 8 | NA |
| Agricultural field | 9.3 | 2.3 | 8 | 12 | NA |
Abbreviations: *SD, standard deviation; MPN, Most probable number; CFU, colony forming unit.