Skip to main content

Table 2 Occupancy of different mosquito habitat categories and types by Anopheles larvae.

From: Community-based surveillance of malaria vector larval habitats: a baseline study in urban Dar es Salaam, Tanzania

Habitat Category

Habitat Type

Anopheles occupancy*

  

Present

Absent

Total

Proportion occupied (%)

OR

P

Natural Habitats

 

Freshwater Swamp

2

23

25

8.0

1.00**

NA**

 

Mangrove Swamp

1

2

3

33.3

NE

NE

 

Marsh

19

31

50

38.0

7.05 [1.49–33.3]

0.014

 

River bed

2

0

2

100.0

NE

NE

 

Seepage

29

32

61

47.5

10.4 [2.3–48.1]

0.003

 

Subtotal:

53

88

141

37.6

1.00**

NA**

Agricultural artificial habitats

 

Ridge and furrow

35

32

67

52.2

12.6 [2.7–57.6]

0.001

 

Rice paddy

14

21

35

40.0

7.67 [1.56–37.8]

0.012

 

Other agriculture

18

52

70

25.7

3.98 [0.85–18.6]

0.079

 

Subtotal:

67

105

172

39.0

1.06 [0.67–1.67]

0.805

Non-Agricultural artificial habitats

 

Construction

19

61

81

23.8

3.58 [0.77–16.6]

0.103

 

Drain

57

166

223

25.6

3.95 [0.90–17.3]

0.068

 

Puddle

36

39

75

48.0

10.6 [2.34–48.3]

0.002

 

Tyre track

16

30

46

34.8

6.13 [1.28–29.4]

0.023

 

Water storage container

1

15

16

6.3

0.77 [0.06–9.22]

0.834

 

Subtotal:

129

311

441

29.3

0.69 [0.46–1.03]

0.066

Uncategorized

 

Other

40

191

232

17.3

2.41 [0.55–10.6]

0.246

 

Subtotal

40

191

232

17.3

0.348 [0.215–0.563]

<0.001

Total

 

289

695

986

29.4

NA

NA

  1. * The proportion of all habitats found to contain Anopheles larvae. Odds ratios (OR) and P values for the likelihood of occupancy were determined by logistic regression, treating habitat category or type as a determinant of detection.
  2. ** Reference group
  3. NE Not estimated: excluded from logistic regression analysis because of insufficient observations.
  4. NA Not Applicable