Abstract:FORATTINI, O. P. et al. Aspectos ecológicos da tripanossomíase americana. XXI -Comportamento de espécies triatomíneas silvestres na reinfestação do intra e peridomicílio. Rev. Saúde públ., S. Paulo, 18: 185 -208, 1984.
RESUMO:Apresentam-se os resultados obtidos com a observação da presença triatomínea em três localidades, uma delas caracterizada por estar submetida a vigilância anual ininterrupta, e duas por terem sido expurgadas respectivamente seis e um ano e meio antes. As duas primeiras situam-se em áreas … Show more
“…The peridomicile can work as a barrier space to intradomiciliary infestation if it offers favorable conditions to the triatomine survival, but it can also serve as an entrance door for colonizing dwellings that present unfavorable conditions (Forattini et al 1984, Diotaiuti et al 1998, Dias 2000. This supposition could explain the in- Exam: examined; Pos: positive; Inf.…”
In order to assay the triatomine infestation and domiciliation in the ruralIn the state of Ceará, the presence of triatomines has been known for a long time, as Alencar (1987) has shown in a research that compiled former surveys carried throughout the state. Alencar et al. (1976) have demonstrated that vectors have not been found in only 9 out of the 141 municipal districts that comprise the geographic division of the whole state of Ceará. The authors have cited the semi-domestic Triatoma brasiliensis as being a primary transmitting species and with larger distribution in that state, found in 91.5% houses of municipal districts, many times with high Trypanosoma cruzi infection indexes. Triatoma pseudomaculata, which is believed less domestic, was found in 68.8% of the municipal districts, with an average infection index of 4.2%. In the distribution ranking, the third species in Ceará was Panstrongylus megistus, displaying a variable infection index; this species was found in 61.7% of the municipal districts. Rhodnius nasutus, with an average of 1% infection index, was found in 17.7% of the municipal districts; Panstrongylus lutzi was found in 18.4% of the municipal districts, presenting an average of 17.9% of infection indexes (Alencar et al. 1976).The objective of the present work was to determine infestation indexes, colonization, and density of triatomines in domiciliary units (DUs) that include intradomicile, peridomicile, and ecotopes found in wild habitats of the four localities that belong to the rural area of Jaguaruana municipality, Ceará, Brazil, formerly considered to be highly infested by these vectors. The indexes were determined by relating them with variables such as type of house's wall type and number of peridomiciliary annexes. The authors have also determined the indexes of natural T. cruzi infection in triatomines captured in each studied habitat and ecotopes.
“…The peridomicile can work as a barrier space to intradomiciliary infestation if it offers favorable conditions to the triatomine survival, but it can also serve as an entrance door for colonizing dwellings that present unfavorable conditions (Forattini et al 1984, Diotaiuti et al 1998, Dias 2000. This supposition could explain the in- Exam: examined; Pos: positive; Inf.…”
In order to assay the triatomine infestation and domiciliation in the ruralIn the state of Ceará, the presence of triatomines has been known for a long time, as Alencar (1987) has shown in a research that compiled former surveys carried throughout the state. Alencar et al. (1976) have demonstrated that vectors have not been found in only 9 out of the 141 municipal districts that comprise the geographic division of the whole state of Ceará. The authors have cited the semi-domestic Triatoma brasiliensis as being a primary transmitting species and with larger distribution in that state, found in 91.5% houses of municipal districts, many times with high Trypanosoma cruzi infection indexes. Triatoma pseudomaculata, which is believed less domestic, was found in 68.8% of the municipal districts, with an average infection index of 4.2%. In the distribution ranking, the third species in Ceará was Panstrongylus megistus, displaying a variable infection index; this species was found in 61.7% of the municipal districts. Rhodnius nasutus, with an average of 1% infection index, was found in 17.7% of the municipal districts; Panstrongylus lutzi was found in 18.4% of the municipal districts, presenting an average of 17.9% of infection indexes (Alencar et al. 1976).The objective of the present work was to determine infestation indexes, colonization, and density of triatomines in domiciliary units (DUs) that include intradomicile, peridomicile, and ecotopes found in wild habitats of the four localities that belong to the rural area of Jaguaruana municipality, Ceará, Brazil, formerly considered to be highly infested by these vectors. The indexes were determined by relating them with variables such as type of house's wall type and number of peridomiciliary annexes. The authors have also determined the indexes of natural T. cruzi infection in triatomines captured in each studied habitat and ecotopes.
“…The interruption of natural transmission is thus underway in the Southern Cone countries (Argentina, Brazil, Bolivia, and Chile) (WHO 1997). However, recolonization of houses by migrating insects (from the same or other species) from sylvatic/peridomestic environments has been documented, as well as the reemergence of populations from surviving bugs (Forattini et al 1984, Gorla 1991, Schofield 1991, Scorza et al 1994, Gajate et al 1996, Oliveira-Filho 1997, Dujardin et al 1999, Almeida et al 2000.…”
“…This was also observed in a study carried out on P. megistus samples from Pernambuco, Bahia, and Rio de Janeiro with 15 isoenzymatic systems in which no isoenzymatic difference among the three populations was found (Barbosa et al, 2001). Panstrongylus megistus is considered a triatomine bug coming from forested and humid regions, owing its dispersion to the adverse conditions of temperature and humidity (Foratini, 1980, Foratini et al, 1977, 1984; the anthropic action would also afford such condition. Thus, the hypothesis that these could explain the presence of different lines of P. megistus in Paraná-BR was raised.…”
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