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Volume 9, Number 3—March 2003

Research

Amplification of the Sylvatic Cycle of Dengue Virus Type 2, Senegal, 1999–2000: Entomologic Findings and Epidemiologic Considerations

Mawlouth Diallo*Comments to Author , Yamar Ba*, Amadou A. Sall*, Ousmane M. Diop*, Jacques A. Ndione†, Mireille Mondo*, Lang Girault*, and Christian Mathiot*
Author affiliations: *Institut Pasteur de Dakar, Dakar, Senegal; †Université Cheikh Anta Diop de Dakar, Senegal

Main Article

Table 2

Temporal and spatial distribution of vector activity and infection in Kedougou, 1999a

Species
Nos. and ratesa
Mosquitos captured in forest gallery
Ngari
Silling
Bandafassi
Kénioto
June Oct Nov June Oct Nov June Oct Nov June Oct Nov Nov
Aedes furcifer male
n
1

8

1
7
1




3
2
Ae. furcifer female
n
1,053
1,586
1,204
2
315
110
37
33
23
21
66
50
18

BR
3.25
5.87
3.65
0.16
8.75
3.66
2.05
2.5
1.27
1.75
5.5
4.17
1

TIR

0.51
2.99


2.85

3.13


16.12

5.55

EIR

0.08
0.32


0.31

0.23


2.67

0.65
Ae. luteocephalus female
n
1,063
682
390


2
1





-

BR
3.28
2.52
1.18


0.07
0.05





-

TIR
-
1.45
3.09









-

EIR

0.11
0.11









-
Ae. aegypti female
n
45
5
15
5
1

4


1


-

BR
0.13
0.45
0.04
0.42
0.03

0.22


0.08


-

TIR


17









-

EIR


0.02









-
Ae. taylori male
n
21
2
32









-
Ae. taylori female
n
358
122
543









-

BR
1.1
0.45
1.64









-

TIR
-
0.92
2.63









-
EIR - 0.01 0.13 -

a n, number of specimens captured; BR, biting rate (number of mosquitoes captured per human per hour);
Oct, October; Nov, November; TIR, true infection rate (estimated number of positive mosquitoes per 100 mosquitoes tested according to Chiang and Reeves [18] and Walter et al. [19]); EIR, entomologic inoculation rate (number of infected mosquito bites per human per evening); –, no data obtained.

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