Biologia de Lutzomyia intermedia Lutz & Neiva, 1912 e Lutzomyia longypalpis Lutz & Neiva, 1912 (Diptera, Phychodidae), em condições experimentais. I. aspectos da alimentação de larvas e adultos

Abstract

To improve our knowledge on the breeding and behaviour of sandflies in captivity, we established closed colonies of Lutzomyia intermedia and Lutzomyia longipalpis. Data are here presented on the feeding preferences of larvae and adults and their influence on the development and survival of each species. Fish food is accepted by the larvae of both species; it is easily available, unexpensive and does not encourage the growth of fungi. The larvae of both species, in all stages accepted food of vegetal and mixed origin, but the 1st and 2nd stage larvae of L. intermedia preferred vegetal food, while the 3rd and 4th stage larvae of L. longipalpis showed a discreet preference for mixed food. Previous feeding on sugar was not necessary to induce a blood meal. Both species can feed on man, dog, hamster and bird, but better development was obtained when the females was fed on hamster. The female of L. longipalpis were more resistant to the absence of blood meal than those of L. intermedia, although 70% of both were able to survive on a sugar meal up to seven days.

Characteristics of the bological cycle of Lutzomyia evandroi Costa Lima & Antunes, 1936 (Diptera: Psychodidae) under experimental conditions

“…These variations may be related to the intensity of rainfall, which might have a deleterious effect on egg and larvae through a direct mechanical action or by a microenvironmental change. In laboratory conditions, immersing the immature stages in water hampered the development of 50% of the eggs and larvae of L. longipalpis (Rangel et al 1986). Additionally, the increase in soil humidity induced by the rain could contribute to organic substances decomposition in a natural environment and therefore improve the quality of the organic mixture to be used as food by the larvae.…”

Flebotomíneos do Parque Nacional Cavernas do Peruaçu, MG

“…O encontro da espécie L. intermedia, comprovadamente vetora de leishmaniose tegumentar em diversas regiões brasileiras (Aguiar et al 1996;Lainson 1989;Rangel et al 1984Rangel et al , 1986, mesmo que em número reduzido, indica que sua presença pode sugerir sua participação na transmissão de LT nos municípios limítrofes da região.…”

Capacidade vetorial de Lutzomyia (Lutzomyia) cruzi (Diptera: Psychodidae) para Leishmania (Leishmania) infantum

“…Method 1 followed the protocols proposed by Killick-Kendrick et al (1977) and Rangel et al (1986), as follows:…”