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Table. 1 Vector competence indexes for WNV of four Italian populations of Cx. pipiens

From: Experimental studies on comparison of the vector competence of four Italian Culex pipiens populations for West Nile virus

 

Frascati

Legnaro

Caffarella

Zafferana

Chi 2 Test

IR

75 %

90 %

63 %

55 %

p = 0.037

(bodies WNV+/tested)

(24/32)

(19/21)

(19/30)

(16/29)

 

DR

54 %

100 %

68 %

50 %

p = 0.001

(legs plus wings WNV+/bodies WNV+)

(13/24)

(19/19)

(13/19)

(8/16)

 

TR

42 %

37 %

47 %

37 %

p = 0.915

(saliva WNV+/bodies WNV+)

(10/24)

(7/19)

(9/19)

(6/16)

 

PTR

31 %

33 %

30 %

21 %

p = 0.758

(saliva WNV+/tested)

(10/32)

(7/21)

(9/30)

(6/29)

 
  1. The IR, DR, TR and PTR of analysed Cx. pipiens populations were calculated from day 6th to 32nd post infection as following reported: IR (Infection Rate) corresponding to the proportion of mosquitoes with WNV positive body among the total number of fed mosquitoes; DR (Dissemination Rate) corresponding to the proportion of mosquitoes with infected legs plus wings with respect to the number of mosquitoes with infected body; TR (Transmission Rate) corresponding to the proportion of mosquitoes with infected saliva with respect to the number of mosquitoes with infected body; PTR (Population Transmission Rate) corresponding to the proportion of mosquitoes with infected saliva among the total number of fed mosquitoes