Table 2. Vertical transmission rates. The number and percentage of samples of emerging mosquitoes assayed for viral infection by isolation in tissue culture.
| Sex | No. of tested mosquitoes | No. of positive mosquitoes | Percentage infection rate |
|---|---|---|---|
| Males | 145 | 4 | 2.76 |
| Females | 265 | 12 | 4.53 |
| Total | 410 | 16 | 3.9 |