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experimental transovarial transmission of st. louis encephalitis virus by culex and aedes mosquitoes.colonized and field-collected female culex tarsalis, infected with st. louis encephalitis, (sle) virus by intrathoracic inoculation or by feeding on a viremic host, transmitted virus to their f1 adult and/or larval progeny when reared at 18(+/- 1) degree c but not when reared at 27(+/- 1) degrees c. the minimal infection rates (mir) for different populations of cx. tarsalis ranged from 1:32 to less than 1:250 (mean = 1:121) for larval progeny and from 1:32 to less than 1:1, 989 (mean = 1:1,571) ...19846696174
vertical transmission of st. louis encephalitis virus to autogenously developed eggs of aedes atropalpus mosquitoes.vertical transmission of st. louis encephalitis virus was demonstrated by a strain of aedes atropalpus mosquitoes from garrett county, md. five-day-old parental females containing fully formed autogenous eggs were infected by intrathoracic inoculation. st. louis encephalitis virus was detected in batches of fertilized eggs and fourth instar larvae. estimated filial infection rates of approximately 1% were observed for both eggs and larvae.19902098473
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