Table. Infection rates, transmission rates and virus titres of Aedes albopictus specimens from two different European populations experimentally infected with chikungunya virus and kept at three different temperatures, November 2017–March 2018 (n = 163 mosquitoes).
| Aedes albopictus population origin | T in °C | Infection ratea | Transmission rateb | Titre | |||
|---|---|---|---|---|---|---|---|
| Number of CHIKV-positive specimens/number of analysed specimens | % | Number of specimens with CHIKV-positive saliva/number of specimens with CHIKV-positive body | % | Mean log10
CHIKV RNA copies/specimen |
SD | ||
| Germany | 18 | 32/32 | 100.0 | 16/32 | 50.0 | 11.3 | 0.6 |
| Germany | 21 | 23/23 | 100.0 | 9/23 | 39.1 | 8.4 | 0.8 |
| Germany | 24 | 24/24 | 100.0 | 9/24 | 37.5 | 8.5 | 0.2 |
| Italy | 18 | 30/30 | 100.0 | 19/30 | 63.3 | 10.8 | 1.8 |
| Italy | 21 | 30/30 | 100.0 | 19/30 | 63.3 | 10.4 | 1.6 |
| Italy | 24 | 24/24 | 100.0 | 9/24 | 37.5 | 8.6 | 0.2 |
CHIKV: chikungunya virus; SD: standard deviation; T: temperature.
a Infection rate: number of CHIKV-positive mosquito bodies per number of fed females.
b Transmission rate: number of mosquitoes with CHIKV-positive saliva per number of mosquitoes with CHIKV-positive bodies.