TABLE 1.
Mosquito species composition and numbers of females per species caught in the Upper Rhine Valley in 1999 and in Bobenheim-Roxheim in 2000 and investigated by virus isolation in Vero cellsa
| Species | No. of individuals (no. of pools)b |
|
|---|---|---|
| 1999 | 2000 | |
| Aedes vexans | 32,431 (678) | |
| Aedes sticticus | 9,177 (209) | |
| Aedes cinereus | 2,078 (58) | |
| Aedes rusticus | 116 (8) | |
| Aedes annulipes | 108 (7) | |
| Culex pipiens/Culex torrentiumc | 10,101 (217) | 4,306 (139) |
| Culex modestus | 3,492 (73) | 20,219 (856) |
| Culiseta annulata | 1,038 (40) | |
| Coquillettidia richardii | 110 (5) | |
| Anopheles maculipennis | 1,161 (41) | |
| Anopheles claviger | 66 (3) | |
| Anopheles plumbeus | 37 (3) | |
| Total | 59,915 (1,342) | 24,525 (995) |
a
No virus isolates were obtained. The pool size never exceeded 50 individuals, with its composition following the strict hierarchic roles to never mix mosquito species, never mix trapping sites, and to mix trapping dates if necessary but not when more than 1 week apart.
b
The total number of mosquitoes caught and the total number of pools in 1999 and 2000 were 84,440 and 2,437, respectively.
c
Sibling species Culex pipiens and Culex torrentium were not tested separately because adult females cannot be distinguished morphologically.