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Table 5 Factors influencing the presence of pupae of Aedes aegypti and Aedes albopictus in the larval habitat

From: Larval ecology and infestation indices of two major arbovirus vectors, Aedes aegypti and Aedes albopictus (Diptera: Culicidae), in Brazzaville, the capital city of the Republic of the Congo

Factor

Modality

Ae. aegypti

Ae. albopictus

OR

95% CI

OR

95% CI

Neighbourhoods location

Downtown

Ref

Ref

Ref

Ref

Suburb

0.07***

0.03–0.15

1.93*

1.03–3.74

 

Rural

0.08***

0.02–0.27

1.03

0.33–2.95

Container types

Axils of plants

na

na

Ref

Ref

Discarded tanks

na

na

6.54 × 10−9

na–6.34 × 10203

Flower-pots

na

na

6.79 × 10−9

na–4.75 × 10203

Miscellaneous

na

na

5.19 × 10−9

na–4.59 × 10203

Storage tanks

na

na

2.01 × 10−9

na–1.47 × 10203

Used tyres

na

na

5.97 × 10−9

na–4.18 × 10203

Container colour

Dark

Ref

Ref

na

na

Light

0.25*

0.08–0.85

na

na

Transparent

0.14**

0.03–0.60

na

na

Container material

Metal

Ref

Ref

Ref

Ref

Plastic

1.84

0.76–4.74

1.01

0.52–2.00

Rubber

0.08**

0.02–0.38

na

na

Miscellaneous

1.35

0.29–5.52

0.25

0.03–1.02

Water quality

Clear

Ref

Ref

Ref

Ref

Turbid

2.54*

1.24–5.19

2.28*

1.23–4.16

Polluted

3.95 × 10−7

na–2.82 × 1021

4.07 × 10−7

na–8.41 × 1023

Water source

Tap

0.38*

0.15–0.89

na

na

Rain

Ref

Ref

na

na

Presence of surrounding vegetation

Yes

5.81***

2.75–13.14

1.98

1.08–3.77

No

Ref

Ref

Ref

Ref

Distance to nearest building

0–5 m

na

na

Ref

Ref

5–10 m

na

na

0.5

0.21–1.08

  1. * P < 0.05, ** P < 0.01, *** P < 0.0001
  2. Abbreviations: na, not applicable; OR, odd ratio; CI, confidence interval; Ref, reference (the reference for each factor were randomly selected by the software) is a comparator group; distances in meters (m)