TABLE 2.
Numbers of presumptive Aeromonas bacteria found in different sites of a sewage water treatment plant, in duckweed, and in control ponds
| Amt of Aeromonas (CFU/ml) | No. (%) of samples froma:
|
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sewage water
|
Duckweed lagoon
|
Fish culture pond
|
Control (water and sediment) | ||||||
| Water | Sediment | Water | Sediment | Duckweed | Water | Sediment | Duckweed | ||
| ≤102 | 5 (50) | 5 (42) | 1 (9) | 26 (96) | |||||
| 103 | 10 (56) | 3 (37) | 4 (40) | 6 (75) | 4 (33) | 2 (18) | 1 (4) | ||
| 104 | 8 (44) | 1 (13) | 1 (10) | 2 (25) | 3 (25) | 5 (45) | |||
| 105 | 2 (25) | 2 (17) | 3 (27) | 2 (29) | |||||
| ≥106 | 2 (25) | 10 (83) | 5 (71) | ||||||
a
Number (%) of samples containing specified level of Aeromonas. The total number of samples collected from each site was as follows. Sewage water: for water, n = 18; for sediment, n = 8. Duckweed lagoon: for water, n = 10; for sediment, n = 8; for duckweed, n = 12. Fish culture pond: for water, n = 12; for sediment, n = 11; for duckweed, n = 7. For the control (water and sediment), n = 27.