First Report on High-Degree Endophilism in Culex tritaeniorhynchus (Diptera: Culicidae) in an Area Endemic for Japanese Encephalitis

An unusually high occurrence of Culex tritaeniorhynchus Giles resting indoors during daytime was observed in a Japanese encephalitis (JE) endemic area, Bellary district, Karnataka, India. Cx. tritaeniorhynchus, the primary vector of JE in this area, was the dominant species collected, and its abunda...

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Bibliographic Details
Published in:Journal of medical entomology 2004-09, Vol.41 (5), p.994-996
Main Authors: Kanojia, P. C., Geevarghese, G.
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Culex - classification
Culex - virology
Culex tritaeniorhynchus
Culicidae
Demography
disease surveillance
Encephalitis Virus, Japanese - isolation & purification
Encephalitis, Japanese - transmission
endophilic behavior
exophilic behavior
Fundamental and applied biological sciences. Psychology
habitats
India
indoor resting places
indoor resting sites
insect behavior
insect vectors
Japanese encephalitis
Japanese encephalitis virus
Medically important nuisances and vectors, pests of stored products and materials: population survey and control
outdoor resting places
outdoor resting sites
Population Density
Seasons
SHORT COMMUNICATION
Vectors. Intermediate hosts
viral encephalitis
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Summary:An unusually high occurrence of Culex tritaeniorhynchus Giles resting indoors during daytime was observed in a Japanese encephalitis (JE) endemic area, Bellary district, Karnataka, India. Cx. tritaeniorhynchus, the primary vector of JE in this area, was the dominant species collected, and its abundance showed two peaks corresponding to rice crops in the district. More specimens (n = 20,966) were found resting in indoor habitats than in outdoor vegetation (n = 383), despite the availability of outdoor resting sites. This resting behavior is opposite to the Cx. tritaeniorhynchus behavior reported in the majority of JE-affected areas, where this species was captured in small numbers from indoor resting sites. Increased endophilic resting behavior indicates that indoor residual insecticides may provide an effective control method in this area.
ISSN:0022-2585
1938-2928
DOI:10.1603/0022-2585-41.5.994