Browsing by Autor "Noireau, F"

Now showing 1 - 5 of 5

Apparent trend to domesticity observed in Panstrongylus Rufotuberculatus champion, 1899 (Hemiptera: Reduviidae) in Bolivia
(Facultad de Medicina, Enfermería, Nutrición y Tecnología Médica, 1994) Noireau, F
ABSTRACT. The recent collection of nymphal instars of Panstrongylus rufotuberculatus Champion, 1899 (Hemiptera:Reduviidae)from a domestic habitat in Bolivia draws attention to the behaviour of this sylvatic triatomine species and demonstrates its ability to colonize domestic structures. The relevance of this observation to the vector control programme is discussed.
Ecogenetics of Triatoma sordida and Triatoma guasayana (Hemiptera: reduviidae) in the Bolivian chaco.
(1999) Noireau, F; Gutierrez, T; Flores, R; Breniere, F; Bosseno, M F; Wisnivesky-Colli, C
Triatoma guasayana and two putative cryptic species pertaining to T. sordida complex (named groups 1 and 2) occur in sympatry in the Bolivian Chaco. Using multilocus enzyme electrophoresis and subsequent genetic analysis, our work assesses their population distribution and dispersal capacity in domestic, peridomestic, and silvatic environments. Our collections by light trap in the silvatic environment indicated a predominance of T. guasayana and T. sordida group 2 and a lesser abundance of T. sordida group 1 ( pound 10% of the total of captures). Their similar distribution in two silvatic areas 80 km apart supports the hypothesis of their homogeneous dispersal through the Bolivian Chaco. The distribution of T. guasayana and T. sordida groups 1 and 2 was similar between silvatic environment and peridomestic ecotopes where 25% of positive places was occupied by two or three species. Bromeliads were confirmed as favorable shelter for T. guasayana but were free of T. sordida. T. sordida group 1 and to a lesser extent T. guasayana would be more invasive vectors for houses than T. sordida group 2. The spatial partition in the three species sampled in two distant sites suggested a reduced dispersive capacity.
Infestation by Auchmeromyia senegalensis as a consequence of the adoption of non-nomadic life by Pygmies in the Congo Republic.
(1992) Noireau, F
Infestation by Auchmeromyia senegalensis as a conseuence of the adoption of non-nomadic life by Pygmies in the Congo Republic
(Facultad de Medicina, Enfermería, Nutrición y Tecnología Médica, 1992) Noireau, F
The Congo floor maggot is the blood-sucking larva of the fly Auchmeromyia senegalensis (Diptera: Calliphoridae) which is specific to sub-Saharan Africa (Dutton et al., 1904). The original specific name given to the fly, A. luteola, has recently been corrected to A. senegalensis as used by Macquart in 1851 (Pont, 1980). The ecology and biology of this insect have been extremely well documented by Roubaud (1914) and Garret-Jones (1950). The flies are usually found in the immediate vicinity of, or inside, human dwellings. The females lay their eggs on the sandy floor, and after hatching the larvae bury themselves into the ground and come out at night for a blood meal. A. senegalensis was initially considered to be specific to man (Garret-Jones, 1950), but it was later discovered in the entrances to burrows of antbears and warthogs, and also associated with the domestic pig …
Low probability of transmission of Trypanosoma cruzi to humans by domiciliary Triatoma sordida in Bolivia
(Facultad de Medicina, Enfermería, Nutrición y Tecnología Médica, 1997) Noireau, F
Abstract The role of Triatoma sordida in the domestic transmission of Trypanosoma cruzi was assessed in 7 rural localities in Velasco Province, Department of Santa Cruz, Bolivia. Tri. sordida, the only triatomine species identified in these localities, was found inside 58.0% of houses but not in large numbers (3.1 bugs per infested house on average). A total of 220 faecal samples from domiciliary bugs was examined microscopically and by the polymerase chain reaction for the presence of trypanosomes: 21.4% were infected. Analysis of blood meals of domiciliary Tri. sordida showed that humans were the commonest host (70.4%), followed by chickens and dogs. Four of 418 persons tested were seropositive for Tryp. cruzi. Only 2 of a second group of 62 persons living in dwellings infested by Tri. sordida were seropositive. Tryp. cruzi infection was demonstrated in dogs and domestic rats. Three other species of small mammals were found to be infected with trypanosomes. In our study area, domestic Tri. sordida are mainly incriminated in the transmission of Tryp. cruzi to synanthropic animals, whereas transmission to humans is very rare. The presence in houses of small populations of Tri. sordida infected with Tryp. cruzi is therefore currently insufficient for this insect to constitute a major epidemiological risk factor.