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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).