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Table 2 Indoor residual spraying efficacy and indoor to outdoor biting ratio shown for each geography (district), season (rainy versus dry) and anopheline species

From: To spray or target mosquitoes another way: focused entomological intelligence guides the implementation of indoor residual spraying in southern Mozambique

 

Rainy season

Dry season

Indoor:outdoor biting ratioa

Minimum IRS efficacy

Maximum IRS efficacy

Indoor:outdoor biting ratioa

Minimum IRS efficacy

Maximum IRS efficacy

Bilene (Gaza)

 An. funestus s.l

ND

ND

ND

4.69:0.77

0.74

1.56

 An. gambiae s.l

ND

ND

ND

0:0.31

0.35

0.65

 An. ziemanni

ND

ND

ND

0.08:0.08

0b

0b

Chokwe (Gaza)

 An. funestus s.l

0.75:0

0.12

0.91

0.21:0.05

2.50

2.81

 An. gambiae s.l

1.30:0

0

0.18

0.11:0.58

0

0.06

 An. tenebrosus

0.73:0

0.05

0.93

0.42:0.68

0.14

0.21

 An. pharoensis

0.18:0

0

0.17

0:0.11

0.36

0.36

 An. ziemanni

0.48:0

0

0.15

0.16:0.21

0.38

0.38

Cidade de Xai Xai (Gaza)

 An. funestus s.l

0:0.44

0b

0b

0.09:0.09

0b

0b

 An. gambiae s.l

0.09:0

5.56

5.56

 An. tenebrosus

3.78:0.56

0b

0b

0.45:2.18

0b

0b

 An. ziemanni

1.00:0.22

0b

0b

0.09:0.36

0

0.38

 An. pharoensis

0:0

0c

0c

Cidade de Imhambane (Inhambane)

 An. funestus s.l

1.38:1.31

0.44

0.54

1.38:0.62

0.40

0.57

 An. gambiae s.l

0.12:0.19

0b

0b

0:0.13

0b

0b

 An. tenebrosus

0.06:0.44

0b

0b

0:0.88

0b

0b

 An. ziemanni

0:0.12

0b

0b

0:0.50

0b

0b

Jangamo (Inhambane)

 An. funestus s.l

6.31:0

0.22

0.54

1.71:0.93

0.46

1.06

 An. gambiae s.l

0.89:0

0.33

0.33

 An. tenebrosus

0:0

0c

0c

Massinga (Inhambane)

 An. funestus s.l

1.89:1.44

0.32

0.32

0.87:0.47

1.07

1.59

 An. tenebrosus

0:0.20

0b

0b

 An. ziemanni

0:0.13

0b

0b

  1. ND means ‘not determined’; – signifies zero mosquitoes in any of the collection methods
  2. ahighest value highlighted in bold
  3. bfeeding indoors and/or outdoors, but not found resting and/or exiting
  4. cresting and/or exiting but not found feeding indoors and/or outdoors