An experimental study of the peridomestic distribution of Lutzomyia longipalpis (Diptera: Psychodidae)

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1994xmlui.dri2xhtml.METS-1.0.item-files-viewOpen
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http://patua.iec.gov.br/handle/iec/2617xmlui.dri2xhtml.METS-1.0.item-author
Quinnell, Rupert J
Dye, Christopher
xmlui.dri2xhtml.METS-1.0.item-abstract
Lutzomyia longipalpis (Lutz & Neiva), the vector of American visceral leishmaniasis
(AVL), is much more abundant in animal sheds than in houses on Marajo
Island, Para State, Brazil. This difference in abundance is known not to reflect host
preference. We show here that it also cannot be explained in terms of variable
trapping efficiency, or insecticide application, and we exclude animal sheds as
important daytime resting sites. In experimental sheds, the number of L. longipalpis
increased markedly with the openness of the walls, though artificially large
aggregations of flies could be generated in closed houses by using caged flies and
hosts as attractants. We conclude that L. longipalpis tend to congregate at sites
outdoors, including animal sheds, because these are the places where leks can most
easily form on abundant, stationary (sleeping) and accessible hosts. These results
help to explain why the seroprevalence of Leishmania chagasi infection is generally
much higher among dogs than humans. They also indicate that human exposure
to sandfly bites varies with the quality of house construction.
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QUINNELL, Rupert J.; DYE, Christopher. An experimental study of the peridomestic distribution of Lutzomyia longipalpis (Diptera: Psychodidae). Bulletin of Entomological Research, v. 84, n. 3, p. 379 - 382, 1994.xmlui.dri2xhtml.METS-1.0.item-decsPrimary
LeishmanioseLeishmaniose Visceral
Reservatórios de Doenças
Vetores de Doenças
Região Norte (BR)
Ilha do Marajó (PA)