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Table 2 Effects of temperature on disseminated infection rate (DIR), transmission rate (TR) and transmission efficiency (TE) to DENV-2 of Ae. aegypti from Buenos Aires (Argentina) after 14 or 21 days at 15°C, 20°C or 28°C

From: Aedes aegyptifrom temperate regions of South America are highly competent to transmit dengue virus

Days post-infection

Buenos Aires

15°C

20°C

28°C

DIR

TR

TE

DIR

TR

TE

DIR

TR

TE

14

29.4

0

0

16.7

33.3

10

66.7

20

10.5

(17)

(5)

(17)

(24)

(4)

(20)

(30)

(20)

(38)*

21

7.7

100

7.7

22.7

100

29.4

78.1

8

6.7

(13)

(1)

(13)

(22)

(5)

(17)

(32)

(25)

(30)*

  1. DIR: Disseminated infection rate is the proportion of mosquitoes with virus detected in the head among examined ones; TR: Transmission rate is the proportion of mosquitoes with infectious saliva among mosquitoes able to disseminate the virus beyond the midgut barrier; TE: Transmission efficiency is the proportion of mosquitoes with infectious saliva among the examined ones; In parenthesis for DIR and TE is the number of mosquitoes examined; In parenthesis for TR is the number of mosquitoes able to disseminate the infection beyond the midgut. * Due to technical issues, particularly fungal contamination of inoculated cell cultures, the number of examined saliva to determine TE was sometimes distinct than the total number of examined mosquitoes for DIR.
  2. Virus was detected by fluorescent assay on C6/36 Ae. albopictus cells.
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BMC Infectious Diseases

ISSN: 1471-2334

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