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.

Simonsen et al.

Simonsen et al. BMC Infectious Diseases 2013 13:335   doi:10.1186/1471-2334-13-335

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