Estudos de algumas populações brasileiras de Lutzomyia (Nyssomyia) whitmani s.l. (Diptera: Psychodidae: Phlebotominae), importante transmissor de agentes da leishmaniose tegumentar americana / Studies of some Brazilian populations of Lutzomyia (Nyssomyia) whitmani s.l. (Diptera: Psychodidae: Phlebotominae), important transmitter of agents of American cutaneous leishmaniasis

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Lutzomyia (Nyssomyia) whitmani s.l. (Antunes &Coutinho 1939) has a large distribution in Brazil, being registered in all geographic regions. In American continent this specie was found in French Guyana, Paraguay, Peru and Argentina. In Brazil its incriminated as a vector of Leishmania (Viannia) braziliensis and Leishmania (Viannia) shawi. Considering the large geographic distribution, the different aspects of biology and the possibility of Leishmania spp. transmission, the objective of the present study was to increase the knowledge about Lutzomyia (N.) whitmani s.l., an important vector of American Cutaneous Leishmaniasis (ACL) in Brazil, determining its geographic distribution in association with epidemiologic circuits of LTA, as well as to evaluate the vectorial competence, the genetic variability and the structure level of some L. (N.) whitmani s.l. Brazilian population. Two maps were created which enabled one to visualize the distribution of. L. (N.) whitmani s.l in the different Brazilian municipalities in association with the different types of vegetation and active transmission of ACL. L. (N.) whitmani s.l. was registered in 720 Brazilian municipalities, been verified in 26 federal units, hadnt been registered only, in state of Santa Catarina, inhabiting different kinds of vegetation and associated with different climates. The discussion about L. (N.) whitmani s.l. representing a species complex is based on aspects of its biology and vetorial competence, that reveal its capacity in transmit two distinct parasites and has different habits living in diversified habitats. The isoenzymatic analysis indicated that the L. (N.) whitmani s.l. populations of the study areas (Paragominas, Santarém, Londrina and Ilhéus) represent only one species with great chances of suffer subdivisions due to the course of evolution. We observed that the population of Paragominas municipality was detached from others by presenting the biggest genetic differentiation, which contributed for the formation of an isolated bunch in the grouping analysis. In an epidemiologic macro-territorial view, independent of being transmitting Leishmania (Viannia) braziliensis and Leishmania (Viannia) shawi, L. (N.) whitmani s.l. can be suggested as the most important vector of American Cutaneous Leishmaniasis in Brazil.

ASSUNTO(S)

entomologia e malacologia de parasitos e vetores cutaneous leishmaniasis epidemiology isoenzimas isoenzymes lutzomyia (nyssomyia) whitmani s.l. vectorial competence epidemiologia da leishmaniose tegumentar lutzomyia (nyssomyia) whitmani s.l. competência vetorial

ACESSO AO ARTIGO

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