Table 4.
Microfilaraemia in the study communities
| Study population | Survey no. | Time of survey | Survey population | No. examined (%) | No. positive for mf (%) | Mf GMI* for all examined | Mf GMI* for positives |
|---|---|---|---|---|---|---|---|
| Kirare |
1 |
Sep-04 |
530 |
471 (88.9) |
123 (26.1) |
4.83 |
851.1 |
| 2 |
Jan-06 |
530 |
461 (87.0) |
96 (20.8) |
2.46 |
385.7 |
|
| 3 |
Jan-07 |
530 |
438 (82.6) |
69 (15.8) |
1.08 |
101.5 |
|
| 4 |
Oct-07 |
530 |
351 (66.2) |
35 (10.0) |
0.70 |
200.3 |
|
| 5 |
Oct-08 |
530 |
302 (57.0) |
39 (12.9) |
0.90 |
142.4 |
|
| 6 |
Oct-09 |
512 |
259 (53.5) |
13 (5.0) |
0.30 |
194.7 |
|
| 7 |
Nov-10 |
690 |
400 (58.0)# |
17§ (4.4) |
0.25¤ |
178.9 |
|
| |
8 |
Nov-11 |
690 |
393 (57.0)# |
11§ (2.7) |
0.15¤ |
180.8 |
| Kiomoni |
7 |
Nov-10 |
504 |
386 (76.6)# |
18§ (4.7) |
0.34¤ |
423.1 |
| |
8 |
Nov-11 |
504 |
312 (61.9)# |
7§ (2.2) |
0.16¤ |
487.3 |
| Kisimatui |
7 |
Nov-10 |
651 |
389 (59.8)# |
34§ (8.7) |
0.55¤ |
159.1 |
| 8 | Nov-11 | 651 | 367 (56.4)# | 24§ (6.5) | 0.33¤ | 77.2 |
Results shown are for two hamlets of Kirare (Mtambuuni, Mashine) in survey 1-8, as well as for one hamlet of Kiomoni (Mabavu) and one hamlet of Kisimatui (Majengo) in survey 7 and 8. Results from all four hamlets of Kirare in survey 1-5 are given in [6].
* Geometric mean intensity, in mf/ml blood.
# Number (%) examined for CFA. In survey 7 and 8, the “number of CFA positives/number of CFA positives examined for mf/number of mf positives detected” were 101/89/15 and 77/65/9 for Kirare, 74/68/17 and 52/52/7 for Kiomoni and 110/91/28 and 84/63/18 for Kisimatui, respectively.
§ Expected number of mf positives among those examined for CFA. Calculated as [number positive for CFA] × [number positive for mf] / [number CFA positives examined for mf].
¤ Expected mf GMI among those examined for CFA. See Methods for calculation.