Volume 17, Number 5—May 2011
Research
Transstadial Transmission of Francisella tularensis holarctica in Mosquitoes, Sweden
Jan O. Lundström
, Ann-Christin Andersson, Stina Bäckman, Martina L. Schäfer, Mats Forsman, and Johanna Thelaus
, Ann-Christin Andersson, Stina Bäckman, Martina L. Schäfer, Mats Forsman, and Johanna ThelausTable 1
Presence of Francisella tularensis lpnA and F. tularensis holarctica–specific 30-bp–deletion region (FtM19InDel) in female and male mosquitoes, Örebro area, Sweden*
| Group | Species | Female mosquitoes |
Male mosquitoes |
|||||
|---|---|---|---|---|---|---|---|---|
| Pools | F. tularensis | F. tularensis holarctica | Pools | F. tularensis | F. tularensis holarctica | |||
| 2a | Aedes communis | 5 (10) | 1 | ND | – | – | – | |
| 2a | Ae. intrudens | 2 (2) | ND | ND | – | – | – | |
| 2a | Ae. punctor | 5 (5) | 1 | 1 | – | – | – | |
| 2a | Aedes spp.† | – | – | – | 10 (31) | 2 | ND | |
| 2b | Ae. cinereus | 7 (135) | 3 | ND | 7 (109) | 2 | ND | |
| 2b | Ae. sticticus | 4 (17) | 2 | ND | 2 (12) | 1 | 1 | |
| 2b |
Ae. vexans |
2 (2) |
1 |
1 |
– |
– |
– |
|
| 1c | Culiseta alaskaensis | 1 (1) | ND | ND | – | – | – | |
| 1c | Cs. annulata | 1 (1) | ND | ND | – | – | – | |
| 1d |
Culex pipiens/torrentium |
1 (5) |
ND |
ND |
1 (4) |
1 |
1 |
|
| Total | 28 (178) | 8 | 2 | 20 (156) | 6 | 2 | ||
*Mosquitoes were collected as larvae in the Örebro area, central Sweden, reared to adults, and analyzed by real-time PCR in pools of up to 50 specimens. Numbers in parenthesis refer to total specimens within pools. ND, not detected; –, not analyzed.
†Male mosquitoes identified as Aedes spp. could belong to any species within functional group 2a and were not identified further. Mosquito functional groups are as defined by Schäfer et al. (15).
