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Table 3 Summary of results of Ae. aegypti colonies’ exposure to DENV

From: Determining vector competence of Aedes aegypti from Ghana in transmitting dengue virus serotypes 1 and 2

 

7 dpi

14 dpi

Combined

Virus

Mosquito colony

Infection rate (%)

Dissemination rate (%)

Transmission rate (%)

Infection rate (%)

Dissemination rate (%)

Transmission rate (%)

Infection rate (%)

Dissemination rate (%)

Transmission rate (%)

DENV-1

AEG HCM

75.9 (22/29)a

90.9 (20/22)a

0 (0/20)

74.5 (35/47)a

88.6 (31/35)a

51.6 (16/31)

75 (57/76)a

89.5 (51/57)a

31.4 (16/51)

GH 23

68 (17/25)a

11.8 (2/17)b

0 (0/2)

21.2 (7/33)bc

71.4 (5/7)a

20 (1/5)

41.4 (24/58)b

29.2 (7/24)bc

14.3 (1/7)

GH 115

39.1 (9/23)ab

22.2 (2/9)b

0 (0/2)

48.1 (25/52)ab

91.7 (23/25)a

34.8 (8/23)

45.3 (34/75)b

73.5 (25/34)ac

32 (8/25)

GH 98

6.7 (2/30)b

0 (0/2)b

N/A

0 (0/35)c

N/A

N/A

3.1 (2/65)c

0 (0/2)bc

N/A

GH 106

15.4 (6/39)b

16.7 (1/6)b

0 (0/1)

11.6 (5/43)c

40 (2/5)a

0 (0/2)

13.4 (11/82)c

27.3 (3/11)bc

0 (0/3)

DENV-2

AEG HCM

30.2 (16/53)a

12.5 (2/16)

0 (0/2)

24 (12/50)a

16.7 (2/12)

0 (0/2)

27.2 (28/103)a

14.3 (4/28)

0 (0/4)

GH 23

0 (0/21)ab

N/A

N/A

5.6 (1/18)ab

0 (0/1)

N/A

2.6 (1/39)ab

0 (0/1)

N/A

GH 115

2.5 (1/40)b

0 (0/1)

N/A

5.7 (2/35)ab

0 (0/2)

N/A

4 (3/75)b

0 (0/3)

N/A

GH 98

0 (0/42)b

N/A

N/A

2.3 (1/44)ab

0(0/1)

N/A

1.2 (1/86)b

0 (0/1)

N/A

GH 106

2.6 (1/38)b

0 (0/1)

N/A

0 (0/41)b

N/A

N/A

1.3 (1/79)b

0 (0/1)

N/A

  1. This table compares the infection, dissemination, and transmission rates of all five mosquito colonies exposed to DENV-1 and DENV-2. The data show the significant superiority of AEG HCM as a vector of DENV relative to all four colonies from Ghana, particularly in terms of susceptibility to DENV infection and dissemination. Numbers in parenthesis show the ratio of positive females to the total number of females screened. Colonies denoted with the same lowercase letter for a given parameter are not significantly different. Statistical significance (P < 0.005) was determined by the Chi squared test with Bonferroni correction