Parasitism
of Ascogregarina taiwanensis and Ascogregarina culicis (Apicomplexa:
Lecudinidae) in larvae of Aedes albopictus and Aedes aegypti (Diptera:
Culicidae) from Manaus, Amazon region, Brazil.
Abstract
The
aim of the study was to determine the existence of Ascogregarina spp. in larvae
of Aedes albopictus and Aedes aegypti collected in urban and suburban areas of
Manaus, Amazon region, Brazil.
Between
May 2004 and July 2005, the mid-gut of 3rd and 4th instar larvae, collected in
tire traps in six neighborhoods of Manaus, was examined for the presence of
trophozoites of Ascogregarina.
Coexistence
of Ae. albopictus larvae infected by A. taiwanensis, and Ae. aegypti larvae by
A. culicis, was detected in traps in the field.
The
percentage of Ae. albopictus larvae infected by A. taiwanensis ranged from 21%
to 93.5% and of Ae. aegypti larvae infected by A. culicis from 22% to 95%.
The
mean infection intensity was similar in both species of Aedes.
In
traps located in Mauazinho, the replacement of Ae. aegypti by Ae. albopictus
larvae was observed.
In
Manaus, Ae. albopictus larvae were parasitized by A. taiwanensis, and Ae.
aegypti larvae by A. culicis.
Infection
rates were high when the species of Aedes were found separately.
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