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Analisi di alcune divergenze morfologiche nel complesso Culex pipiens (Diptera, Culicidae).
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Notes sur les vecteurs de paludisme et de filariose de Bancroft dans les iles de la Grande Comore et de Moheli (R.F.I. des Comores).
No full textDonnées préliminaires sur le complexe Anopheles gambiae dans la République Fédérale Islamique des Comores.
No full textInsecticide susceptibility levels of Anopheles gambiae s.l. in the area of Ouagadougou, Burkina Faso.
No full textRole of Culex quinquefasciatus in the transmission of bancroftian filariasis in the Federal Islamic Republic of Comoros (Indian Ocean)
No full textIn October 1988-January 1989, as a part of a malaria and filariasis control programme in Federal Islamic Republic of Comoros an entomological survey was carried out in 19 rural and urban localities of Grande Comore. Anjouan and Moheli Islands. The potential breeding places were examined and pyrethrum spray catches were made to evaluate the indoor resting densities of mosquitos. A total of 14.578 adult mosquitos potential vectors of filariasis was collected: 94.5% Culex quinquefasciatus, 3.5% Anopheles gambiae s. str. 1.9% A. funestus and 0.1% other anopheline species. A. funestus, uniformly spread in Moheli, was present only in the south-west coast of Anjouan and absent in Grande Comore. A. gambiae and Cx quinquefasciatus were present in Grande Comore. A. gambiae and Cx quinquefasciatus were present in the three islands with different densities in the villages. Only Cx quinquefasciatus specimens la maximum of 150 for each locality) were dissected to search filaria larvae being the Anopheles specimens used to evaluate the malaria transmission. The global infection rate (9.4%) and the infectivity rate (0.9%) observed in Cx quinquefasciatus are higher than indices reported in previous surveys. All the larvae in the third development instar (L3) were identified as Wuchereria bancrofti. The results suggest that in FIR of Comoros W. bancrofti is well adopted to local Cx quinquefasciatus population. Because of the presence of high mosquito density this species plays a prominent role in the transmission of lymphatic filariasis in that area. The high transmission levels calls for the implementation of a specific control program
Etude chromosomique d'Anopheles gambiae et Anopheles arabiensis à Ouagadougou (Burkina Faso) et dans quelques villages voisins.
No full textAbstract. Adult females of Anopheles gambiae sJ. wete collected by pyrethrum spray catch in
Ouagadougou (purkina Faso, formetly Upper Volta) and in four-nèighbouring
-viliages.
The
collections have been carried out mostly during the 1984 rainy season. Monthly collectionJin some
sampling sites allowed a ,preliminary longitudinal study. By analysis of nurse cell polytene
chromosomes in adult females, An. gambiae s.str. and An. arabiensis were identified in the itudv
area. Both species showed polymorphisms for various paracentric inversions. In all samples oÎ
An. arabiensis.the frequencies of the alternative karyotypes were in Hardy-I7einberg
-equilibrium,.
suggesting panmictic conditions. Conversely, An. gambiae s.su. showed a
-different
situation, since most of its samples had strong defiçiency of certain expected heterokaryotypes.
Ihis same phenomenon was already observed in Mali, leading to the silitting of. gambiae'sitr.
into different chromosomal forms, partially or totally reproductively isolated from each other.
Each chromosomal form is characterized by different ôhromosomal pôlymorphisms. Two of these
forms, Mopti and Savanna, were detected in the study area. Moirti ôhromosomal form is
apparently,âssociated with the presence of permanent waiers (i.e. thé north of the
t_own), while Savanna,,is usu-ally found _in situations where breeding places are mainly dependent
from rain (e.g. in villages far from or at the town's cênter)
Significato di alcune differenze biometriche in diverse popolazioni del complesso Culex pipiens.
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Morphometric analysis of some populations of three species of the Anopheles gambiae complex (Diptera: Culicidae)
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