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J Am Mosq Control Assoc. 1994 Sep;10(3):413-8.

Seasonality, prevalence and pathogenicity of the gregarine Ascogregarina taiwanensis (Apicomplexa: Lecudinidae) in mosquitoes from Florida.

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1
U.S.D.A. Medical and Veterinary Entomology Research Laboratory, Gainesville, FL 32604.

Abstract

Aedes albopictus larvae collected in Gainesville, FL, were infected with the gregarine Ascogregarina taiwanensis. Natural prevalence varied from 68 to 100%. Eight mosquito species were tested in the laboratory for susceptibility to A. taiwanensis isolated from field-collected Ae. albopictus. Aedes aegypti, Aedes albopictus, and Aedes taeniorhynchus became 100% infected in the larval stage, whereas Aedes triseriatus was less susceptible; Culex quinquefasciatus, Culex nigripalpus, Culex territans, and Anopheles quadrimaculatus were not susceptible. Viable A. taiwanensis oocysts from adults were recovered from Ae. taeniorhynchus (30%) and Ae. albopictus (100%); no oocysts were produced in the other exposed hosts. Mortality induced by A. taiwanensis infection was low in all mosquitoes except Ae. taeniorhynchus. We conclude that A. taiwanensis has little short-term impact on the mortality of the 3 most common container-inhabiting mosquito species in Florida; however, the long-term impact on overall host population regulation has yet to be determined.

PMID:
7807086
[Indexed for MEDLINE]
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