Tea industry is a labor intensive agro-industry and filariasis is mostly localized among the tea garden workers in Assam. The workers live inside the gardens in colonies. Studies conducted in two cosecutive years revealed that among the host seeking Culex quinquefasciatus average infection rate was 4.6% and with 2.1 larvae per mosquito. The overall prevalence of infective mosquitos was 0.8% wit...

The Sterile Insect Technology (SIT) is a nonpolluting method of control of the invading insects that transmit the disease. The method relies on the release of sterile or treated males in order to reduce the wild population of anopheles mosquito. We propose two mathematical models. The first model governs the dynamics of anopheles mosquito. The second model, the SIT model, deals with the interac...

A dengue tem ampla distribuição em áreas tropicais, ocorrendo de forma endêmica e eventualmente epidêmica. É transmitida por mosquitos do gênero Aedes, principalmente Aedes aegypti, cuja distribuição e adaptação em ambientes urbanos e peridomiciliares explica a predominância da dengue em cidades. A doença ocorre com a introdução de paciente virêmico em ambiente onde há concentração suficiente d...

" when the shepherds return from the Apennines, where the}' have passed the summer, to their cabins in the Roman Campagna, generally in the months of September and October, they do not occupy them before thoroughly smoking them to drive out the numerous mosquitos." Koch has pointed out that in German East Africa the natives of the highlands declare that when they visit the unhealthy lowlands they

Surveys of mosquitos in Sri Lanka have generally been confined to the South. A recent study in Jaffna peninsula in northern Sri Lanka reported on the biology of peridomestic mosquito species. The present survey indicates the predominant species to be Armigeres durhami (Edwaards) and Armigeres subalbatus (Coquillett). Aedes albopictus (Skuse), Ae. aegypti (Linnaeus) and Ae. novalbopictus Barraud...

The susceptibility of Anopheles minimus s.l., Aedes aegypti, Ae. albopictus, and Culex quinquefasciatus to insecticide in northern Thailand was monitored by using the WHO standard susceptibility test. Oneto two-day old female mosquitos, which were reared from wild caught females or immature stages, were exposed to discriminating dosages of insecticides for recommended exposure periods, and the ...

The objective of the present study is to determine the bioefficacy of different crude extracts of Ajuga remota against anopheline and culicine larvae. Larval susceptibility of crude carbon-tetrachloride, methanol and petroleum-ether extracts of Ajuga remota leaves was observed against the malaria vector, Anopheles stephensi and the filariasis vector, Culex quinquefasciatus. Among the extracts t...

Antimicrobial peptides include a diverse array of both natural and synthetic molecules varying greatly in size, charge, hydrophobicity and secondary-structural features. Although better known as antibacterial agents, many peptides have demonstrated activity against the malarial parasite Plasmodium either in its vertebrate blood stages or mosquito stages or both. The antimalarial peptides review...

Transmission of Plasmodium falciparum and P. malariae was studied in a village in Burkina Faso. Consecutive captures of mosquitos were organized twice a month over a year and the species of the mosquitos identified. Also, the prevalences and densities of Plasmodium spp. were determined every 2 months in a sample of children who lived in the village. Anopheles gambiae, A. funestus, and A. nili w...

In a continuing effort to develop novel β-carbolines endowed with better insecticidal activity, a simple high-yielding method for the synthesis of harmine compounds starting from L-tryptophan has been developed and a series of 1,3-substituted β-carboline derivatives have been synthesized and evaluated for their cytotoxicity against insect cultured Sf9 cell line in vitro and insecticidal activit...