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Table 1 Entomologic indices at baseline study (1999–2000)

From: Impact of repeated ivermectin treatments against onchocerciasis on the transmission of loiasis: an entomologic evaluation in central Cameroon

Study period

 

No. of chrysops caught*

BD

TP

Infection rate (%)

Infective rate (%)

MHL3 load

  

S

D

S+D

S

D

S+D

S

D

S+D

S

D

S+D

S

D

S+D

S

D

S+D

March

 

63

10

73

32.6

5.2

37.8

55.6

0.0

55.6

3.6

20.0

6.2

3.6

0.0

3.1

53.5

0.0

53.5

April

 

251

56

307

125.5

28.0

153.5

754.9

9.0

763.9

9.3

12.5

9.9

3.6

3.6

3.6

162.5

9.0

134.5

May

 

184

41

225

47.5

10.6

58.1

12.4

0.0

12.4

7.0

0.0

5.8

1.6

0.0

1.3

16.0

0.0

16.0

June

 

339

38

377

78.2

8.8

87.0

95.1

4.6

99.7

5.3

10.5

5.8

0.9

2.6

1.1

137.4

20.0

108

 

Total

837

145

982

283.8

52.6

336.4

918

13.6

931.6

6.7

9.0

7.1

2.1

2.1

2.1

119.4

12.7

103.4

 

p-value

-

-

-

-

 

0.94

-

0.89

 

-

 
  1. *All the Chrysops were dissected except six C. silacea caught in March (2) and April (4); BD= biting densities; TP= transmission potential; MHL3= mean head L3 load; S= Chrysops silacea; D= Chrysops dimidiata; S+D= both species combined.