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Volume 17, Number 5—May 2011

Research

Transstadial Transmission of Francisella tularensis holarctica in Mosquitoes, Sweden

Jan O. LundströmComments to Author , Ann-Christin Andersson, Stina Bäckman, Martina L. Schäfer, Mats Forsman, and Johanna Thelaus
Author affiliations: Authors affiliations: Uppsala University, Uppsala, Sweden (J.O. Lundström, M.L. Schäfer); Swedish Defence Research Agency, Umeå, Sweden (A.-C. Andersson, S. Bäckman, M. Forsman. J. Thelaus)

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Table 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).

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