Table 3.
Helminth egg counts (hookworm and Ascaris lumbricoides) and prevalence in the four sampling systems in Kampala obtained from water samples (sampling period: 15 October to 5 December 2013)
| Sampling system | Egg counts (/L) | No. positive | Prevalence rates | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Helminth egg in water | Min | Max | Mean | Lower 95 % CI | Upper 95 % CI | % positive | Lower 95 % CI | Upper 95 % CI | |
| Nakivubo channel (n = 112) | |||||||||
| Hookworm | 0 | 160 | 2.0 | 1.5 | 2.6 | 23 | 20.5 | 13.0 | 28.0 |
| Ascaris lumbricoides | 0 | 10 | 1.1 | 1.0 | 1.1 | 3 | 2.7 | – | – |
| Nakivubo wetland (n = 48) | |||||||||
| Hookworm | 0 | 933 | 1.3 | 0.9 | 1.8 | 3 | 6.3 | – | – |
| Ascaris lumbricoides | 0 | 0 | – | – | – | 0 | 0 | – | – |
| Community areas (n = 8) | |||||||||
| Hookworm | 0 | 0 | – | – | – | 0 | 0 | – | – |
| Ascaris lumbricoides | 0 | 40 | 1.6 | 0.5 | 4.7 | 1 | 12.5 | – | – |
| Lake Victoria (n = 32) | |||||||||
| Hookworm | 0 | 40 | 1.3 | 0.8 | 2.2 | 1 | 3.1 | – | – |
| Ascaris lumbricoides | 0 | 0 | – | – | – | 0 | 0 | – | – |
| Total (n = 200) | |||||||||
| Hookworm | 27 | 13.5 | 8.8 | 18.2 | |||||
| Ascaris lumbricoides | 4 | 2.0 | 0.1 | 3.9 | |||||
| Total helminth eggs | 31 | 15.5 | 10.5 | 20.5 | |||||
For egg counts, the minimum and maximum, geometric mean and 95 % confidence intervals (CIs) for Student’s t test are indicated. For the prevalence, CIs are indicated