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Les moustiques de République Centrafricaine : distribution, abondance et fréquence des culicinés dans l'Ouest du pays, les arbovirus isolés
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cordellier, Roger Geoffroy, Bernard |
| Copyright Year | 1976 |
| Abstract | Two hundred and fifty catches were made by net in low vegetation forest, forest-gallery and wooded Savannah within thirty two square degrees in western Central African Republic. These catches furnished approximately one hundred thousand mate and female mosquitos. The analysis of the results, after identification of the material gathered, slow several cetegories of conclusions to be drawn. 1) The faune1 inventory shows more than 200 species of Culicides in the Central African Republic. ; this being about 50 % more than that reported by Rickenbach 11969). Some of these species, namely C. perfuscus, C. guiarti/ingrami, C. pruina, C. weschei, A. africanus, A. gr. palpalis and E. gr,chrysogaster, are numerous and common, and are seen very freqoently and abundantly in one or another of the three habitats (forest, forest-galleries, or savannehl. The others have nothing of interest but to contribute to the distribution maps in the Ethiopien region. 2) Each species was the abject of a study of its distribution in the different habitats of the diverse phytogeographic zones. Each rime its abundance and freqoency were studied and an index of prevalence, equal to he yield-worth of these two characteristics, shows the importance of the species in the low vegetation areas explored. The results permit one to say that some species inhabit only one habitat, that others show a more or less marked preference for one or another habitat and finally that still others seem to show no preference as to habitat. If the species keeping strictly to their own habitat are rare, those that show strong preferences, be it for the forest, the forest-galleries or the wood Savannah, are numerous. This is perticularly true with A. africanus, important as the selvatic vector of yellow fever, that clearly escapes the low vegetation of forest region. 3) When the study involves a group of species that cannot be identified except by the male genitalia, we give an analysis of the specific composition of the group in terms of the phytogeographic zones. One cari also appreciate the value of the inhabitation of these zones by the female of these groups in terms of the relative importance of the males of the different species. 4) Each species is placed in its ‘Ethiopian” context in SO far as concerns its distribution on the african continent. On addition to species with a large distribution, we include the oriental species and the others that inhebit West Africa more specifically. The C.A.R. appear to be a crossroads where the eestern and western distributions of African mosquitos converge. This characteristic should be even more accentuated when the eastern regions of the country are explored. 5) An arbovirologic inventory was also made. This inventory was in fact the essential reason for our wàrk. Twenty strains of arbovirus were isolated of which seven were new prototypes. Beside the Semliki F.J., Sindbis, Bagaza, Usutu, Ilesha, Simbu, Mossuril, and Tataguine viruses that were already known, the following new prototypes were found : Birao, Nola, Bangoran, Gomoka, Yata, Zinga, and Sokumba. We note that the Mossuril virus was isolated nine times out of the twenty isolations made, and that the Zinga virus has since been isolated from serum sample of febrile man. These isolations were obtained from thirteen species of mosquitos. It is of special note that of the species concerned almost ail belong to the categories of mosquitos noted as strongly or very strongly represented in low vegetation in the different habitats studied in the Central African Republic. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/pt5/travaux_d/08051.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
