Volume 35, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Vertical transmission of St. Louis encephalitis (SLE) virus to F larval progeny was demonstrated in 8 species of mosquitoes which occur in Florida: , and . Relatively high rates of such transmission were observed in and vertical transmission to F adult progeny and venereal transmission from males to females also were demonstrated with this species. Larval rearing temperature affected transstadial transmission of the virus in , especially to the adult stage. Such transmission was observed with a larval rearing temperature of 18°C but not at 27°C. Because of the abundance and distribution of in Florida, and the relatively high rates of vertical transmission of SLE virus observed in the present experiments, this mosquito species warrants further investigation as a possible overwintering host for the virus in that locality.


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