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Table 6 Relative abundance and indoor distribution of mosquitoes, across three study wards (including Minepa and Mavimba wards, from where Culex larvae were also obtained for the resistance tests). Data obtained from an annual mosquito surveillance programme conducted by the Ifakara Health Institute in Ulanga District, south-eastern Tanzania in 2012, 2013, and 2015

From: Fine-scale spatial and temporal variations in insecticide resistance in Culex pipiens complex mosquitoes in rural south-eastern Tanzania

Ward

Mosquito species

2012

n (%)

2013

n (%)

2015

n (%)

Total

Minepa Ward

Total mosquitoes collected

57,393

23,448

39,359

120,200

An. arabiensis, femalesa

15,305 (26.6)

9224 (39.3)

10,950 (27.8)

35,479

An. funestus group, females

7713 (13.4)

1582 (6.7)

3097 (7.9)

12,392

Cx. pipiens complex, males

6469 (11.2)

2062 (8.7)

4160 (10.5)

12,691

Cx. pipiens complex, femalesb

27,906 (48.6)

10,580 (45.1)

21,152 (53.7)

59,638

Mavimba ward

Total mosquitoes collected

44,378

14,673

23,540

82,591

An. arabiensis, femalesa

4292 (9.6)

3158 (21.5)

2101 (8.9)

9551

An. funestus group, females

2460 (5.5)

894 (6.0)

793 (3.4)

4147

Cx. pipiens complex, males

8608 (19.3)

1418 (9.6)

3034 (12.8)

13,060

Cx. pipiens complex, femalesb

29,018 (65.4)

9203 (62.7)

17,612 (74.8)

55,833

Kivukoni ward

Total mosquitoes collected

98,902

34,374

51,251

184,527

An. arabiensis, femalesa

9572 (9.6)

4416 (12.8)

7070 (13.7)

21,058

An. funestus group, females

3327 (3.3)

663 (1.9)

860 (1.6)

4850

Cx. pipiens complex, males

18,905 (19.1)

7546 (21.9)

11,155 (21.7)

37,606

Cx. pipiens complex, femalesb

67,098 (67.8)

21,749 (63.2)

32,166 (62.7)

121,013

  1. aSub-samples of An. gambiae complex mosquitoes collected in this area during this period have consistently been 100% An. arabiensis
  2. bA sub-sample of 1053 Culex mosquitoes were subjected to further morphological examination and identified as Cx. pipiens complex