RESUMO
Simulium jeteri (Py-Daniel, Darwich, Mardini, Strieder Coscarón, 2005) was not fully described, because only pharate male and female adults extracted from pupae were used for the original descriptions. Important diagnostic characters were either incompletely or poorly described. During field work in areas at the same hydrographic basin of the type-locality, we were able to rear adult stages. The main objective of this study is to redescribe the male and female of S. jeteri, providing a complete description, including morphological characteristics not reported before, such as, presence of a median ventral projection on male ventral plate and a bilobed anal lobe on female terminalia. Additional characters of pupae and larvae are given. The addition of new characters will be useful to better understand phylogenetic relationships among species in this group. Females of S. jeteri are not known to bite.
Assuntos
Simuliidae , Animais , Feminino , Larva , Masculino , Filogenia , PupaRESUMO
Nor Biomphalaria glabrata neither Schistosoma mansoni were reported from Rio Grande do Sul, the southernmost Brazilian state before 1997. Their detection next to the Sinos River, Esteio, confirmed predictions of schistosomiasis expansion to the south. Parasitological examinations both in snails and fecal samples from the human population were performed from 1997 to 2000. The last 3 out of 5 surveys were performed after a preliminar serological screening procedure in a risk group identified at a population census. A total of 11 infected individuals were found infected and snails from 2 different sites were positive for S. mansoni. Samples from these 2 and other sites were identified as B. glabrata. Egg counts in feces were below 1 per gram in 6 out of 11 patients. Some socio-cultural perceptions of water contact activities next to the Sinos River may cause difficulties to control efforts, but they also may be partially acting against a very rapid increase in transmission intensity. The southernmost schistomiasis mansoni foci in Americas rise the alert for its ongoing expansion.
Assuntos
Esquistossomose/epidemiologia , Adolescente , Adulto , Animais , Biomphalaria/parasitologia , Brasil/epidemiologia , Vetores de Doenças , Doenças Endêmicas , Fezes/parasitologia , Humanos , Masculino , Pessoa de Meia-Idade , Contagem de Ovos de Parasitas , Prevalência , Fatores de Risco , Rios , Esquistossomose/diagnóstico , Esquistossomose/transmissãoRESUMO
Nor Biomphalaria glabrata neither Schistosoma mansoni were reported from Rio Grande do Sul, the southernmost Brazilian state before 1997. Their detection next to the Sinos River, Esteio, confirmed predictions of schistosomiasis expansion to the south. Parasitological examinations both in snails and fecal samples from the human population were performed from 1997 to 2000. The last 3 out of 5 surveys were performed after a preliminar serological screening procedure in a risk group identified at a population census. A total of 11 infected individuals were found infected and snails from 2 different sites were positive for S. mansoni. Samples from these 2 and other sites were identified as B. glabrata. Egg counts in feces were below 1 per gram in 6 out of 11 patients. Some socio-cultural perceptions of water contact activities next to the Sinos River may cause difficulties to control efforts, but they also may be partially acting against a very rapid increase in transmission intensity. The southernmost schistomiasis mansoni foci in Americas rise the alert for its ongoing expansion.