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Table 2 Circulating filarial antigens and microfilariae in the rural study communities in Tanga District

From: Lymphatic filariasis control in Tanga Region, Tanzania: status after eight rounds of mass drug administration

Communitya Time (number) of survey Survey population Circulating filarial antigen Microfilariae
No. examined No. positive (%) p-valueb No. examinedc No. positive Community mf prevalencec Mf GMIdfor all examined Mf GMIfor positives
Kirare Nov-10 (7) 554 319 98 (30.7) 0.051 89 15 5.2 0.31 178.9
Nov-11 (8) 554 311 74 (23.8) 60 9 3.6 0.20 180.8
Sep-13 (9) 624 422 69 (16.4) 0.012 60 20 5.5 0.31 293.7
Kiomoni Nov-10 (7) 394 293 71 (24.2) 0.323 68 17 6.1 0.44 423.1
Nov-11 (8) 394 233 48 (20.6) 48 7 3.0 0.20 487.3
Sep-13 (9) 451 338 42 (12.4) 0.008 36 5 1.7 0.10 282.2
Kisimatui Nov-10 (7) 492 277 107 (38.6) 0.075 91 27 11.5 0.80 171.7
Nov-11 (8) 492 259 81 (31.3) 61 17 8.7 0.46 74.5
Sep-13 (9) 517 301 53 (17.6) <0.001 42 6 2.5 0.13 107.7
All three combined Nov-10 (7) 1440 889 276 (31.0) 0.009 248 59 7.4 0.49 225.0
Nov-11 (8) 1440 803 203 (25.3) 169 33 4.9 0.28 141.6
Sep-13 (9) 1592 1061 164 (15.5) <0.001 138 31e 3.5 0.21 240.4
  1. Results are from individuals aged ≥10 years during surveys 7, 8 and 9. Results from earlier surveys were given in [18].
  2. aTwo hamlets of Kirare (Mtambuuni, Mashine), one hamlet of Kiomoni (Mabavu) and one hamlet of Kisimatui (Majengo).
  3. bFor difference in prevalence (Pearson chi-square test).
  4. cOnly CFA positives were examined. See Methods for calculation.
  5. dGeometric mean intensity, in mf/ml blood. See Methods for calculation.
  6. eEight females, 23 males (mean age: 37.1 years; range 10–73 years).