Table. Susceptibility and transmission rates of mosquitoes experimentally infected with Zika virus (n = 856).
| 14 days post infection | 21 days post infection | ||||||
|---|---|---|---|---|---|---|---|
| Mosquito taxa | T in °C | IRa (%) |
Mean (SD) log10 RNA copies/specimenb |
TRc (%) |
IRa (%) |
Mean (SD) log10 RNA copies/specimen |
TR (%) |
| Aedes aegypti | 18 | 17/31 (55) |
4.70 (0.86) |
0/17 | 18/33 (55) |
4.33 (0.63) |
0/18 |
| 27 | 31/63 (49) |
8.69 (1.60) |
14/31 (45) |
36/50 (72) |
6.82 (1.75) |
11/36 (31) |
|
| Aedes albopictus, ITA | 18 | 19/30 (63) |
4.05 (0.59) |
0/19 | 14/39 (36) |
5.52 (0.87) |
0/14 |
| 27 | 22/31 (71) |
6.34 (2.14) |
4/22 (18) |
15/29 (52) |
7.41 (2.22) |
2/15 (13) |
|
| Aedes albopictus, GER | 18 | 4/32 (13) |
6.22 (1.25) |
0/4 | 11/32 (34) |
6.36 (1.39) |
0/11 |
| 27 | 20/31 (65) |
6.78 (2.41) |
4/20 (20) |
18/34 (53) |
8.61 (1.82) |
6/18 (33) |
|
| Culex p. molestus | 18 | 12/41 (29) |
3.40 (0.38) |
0/12 | 2/32 (6) |
2.48 (0.29) |
0/2 |
| 27 | 7/29 (24) |
3.73 (0.38) |
0/7 | 12/38 (32) |
4.02 (0.44) |
0/12 | |
| Culex p. pipiens | 18 | 16/34 (47) |
3.38 (0.40) |
0/16 | 3/32 (9) |
3.88 (0.43) |
0/3 |
| 27 | 3/37 (8) |
3.13 (0.45) |
0/3 | 0/35 (0) |
NAd | NAd | |
| Culex torrentium | 18 | 11/35 (31) |
3.15 (0.47) |
0/11 | 1/38 (3) |
3.31 (NA) |
0/1 |
| 27 | 4/36 (11) |
3.80 (1.79) |
0/4 | 0/34 (0) |
NAd | NAd | |
GER: from Germany; IR: infection rate; ITA: from Italy; NA: not available; SD: standard deviation; T: temperature; TR: transmission rate.
a Infection rate: number of ZIKV-positive mosquito bodies per number of fed females.
b RNA copies were averaged over all ZIKV-positive mosquito bodies excluding the zeros of ZIKV-negative mosquito bodies.
c Transmission rate: number of mosquitoes with ZIKV-positive saliva per number of ZIKV-positive mosquito bodies.
d Not available: Mean viral RNA copies and transmission rate could not be calculated for the species–temperature combinations with no ZIKV-positive bodies.