Estefanofilariose em humanos: ocorrência e mecanismos de transmissão / Stephanofilariasis in humans: occurrence and transmission mechanisms

Descreve-se aqui o encontro do helminto Stephanofilaria spp., em dermatite nodular ulcerativa em seres humanos, sendo as ulceras pesquisadas de dimensões variadas e com alguns anos de existência. Acredita-se que, a presença desse parasita, que afeta diversas espécies de animais domésticos e silvestres, possa agravar o quadro com as lesões produzidas nos vasos venosos e linfáticos, reduzindo a circulação, retardando a cicatrização. O ciclo deste parasita no ser humano, também é descrito.

This work describes the occurrence of the helminth Stephanofilaria spp in ulcerative nodular dermatitis in humans. The ulcers observed presented a variety of sizes and some years of existence. It is believed that the presence of this parasite, which affects several domestic and wild animal species, may harm human health through lesions produced in venous and lymphatic vessels that reduce blood circulation and retard the healing process. The cycle of this parasite in humans is also described.

Development of Dirofilaria repens in Aedes aegypti reared in contrasting habitat.

The susceptibility of Dirofilaria repens infection in Aedes aegypti adults reared in hay-infusion and tap-water during their larval stages was tested. Ae. aegypti reared in hay-infusion ingested a bigger amount of blood than those reared in tap-water but harboured fewer D. repens larvae (developing and arrested). The difference in the susceptibility of mosquitoes from the two treatments was correlated with the difference in the robustness of the mosquitoes.

The periodicity of Brugia malayi in South Thailand.

The periodicity of Brugia malayi microfilariae were studied in the two endemic areas of the South Thailand i.e. in Pattani and Narathiwat provinces. It was found that in Pattani province the microfilariae had a markedly nocturnal periodicity character while in Narathiwat province they were of a nocturnal sub-periodic type. Moreover, the microfilariae of periodic form in Giemsa stained blood films usually had "unsheathed" appearance (71.5%), while those of sub-periodic type were mostly of "sheathed" form (93.4%).