Table 3.
S. mansoni intensity of infection at sentinel sites in 2009 and 2012 in Sierra Leone
|
2009 |
2012 |
Change (%) | |||
|---|---|---|---|---|---|
| Number examined | Mean intensity of infection (epg) (95% CI) | Number examined | Mean intensity of infection (epg) (95% CI) | ||
|
Overall
|
770 |
134.53 (93.51 - 175.55) |
1290 |
18.98 (11.46 - 26.50) |
−85.9 |
|
By district
|
|
|
|
|
|
| Bo |
119 |
35.09 (17.59 - 52.59) |
198 |
0.12 (0–0.36) |
−99.7 |
| Bombali |
142 |
48.85 (27.67 - 70.02) |
239 |
18.68 (5.95 - 31.41) |
−61.8 |
| Kailahun |
90 |
194.93 (116.14 - 273.73) |
149 |
19.33 (8.62 - 30.03) |
−90.1 |
| Kenema |
119 |
191.60 (132.61 - 250.58) |
199 |
25.69 (11.99 - 39.39) |
−86.6 |
| Koinadugu |
60 |
250.80 (180.44 - 321.16) |
100 |
42.72 (24.86 - 60.58) |
−83.0 |
| Kono |
60 |
159.60 (87.16 - 232.04) |
101 |
10.22 (5.66 - 14.78) |
−93.6 |
| Tonkolili |
180 |
91.33 (57.43 - 125.24) |
304 |
24.87 (14.94 - 34.80) |
−72.8 |
|
By baseline endemicity
|
|
|
|
|
|
| Low |
118 |
9.25 (0–18.56) |
201 |
15.50 (0–34.84)* |
67.6 |
| Moderate |
294 |
29.81 (19.14 - 40.48) |
498 |
8.78 (2.79 - 14.76) |
−70.5 |
| High |
358 |
226.01 (153.79 - 298.23) |
591 |
26.41 (13.18 - 39.64) |
−88.3 |
|
By sex
|
|
|
|
|
|
| Boys |
373 |
133.96 (80.79 - 187.13) |
645 |
19.30 (9.30 - 29.30) |
−85.6 |
| Girls | 396 | 135.00 (72.98 - 197.02) | 644 | 18.69 (7.45 - 29.94) | −86.2 |
*Change in intensity of infection in this group is not statistically significant (p = 0.26).