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Titolo:
CYTOGENETICAL ANALYSIS OF THE SIMULIUM-DAMNOSUM COMPLEX (DIPTERA, SIMULIIDAE) IN GUINEA-BISSAU
Autore:
CHARALAMBOUS M; SHELLEY AJ; GRACIO AJD; RAYBOULD JN;
Indirizzi:
NAT HIST MUSEUM,DEPT ENTOMOL,DIV MED & VET,CROMWELL RD LONDON SW7 5BDENGLAND UNIV NOVA LISBOA,INST HIGIENE & MED TROP P-1200 LISBON PORTUGAL
Titolo Testata:
Medical and veterinary entomology
fascicolo: 1, volume: 9, anno: 1995,
pagine: 34 - 42
SICI:
0269-283X(1995)9:1<34:CAOTSC>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SANCTIPAULI;
Keywords:
SIMULIUM-DAMNOSUM; S-KONKOURENSE; KONKOURE FORM; S-SIRBANUM; ANTHROPOPHILY; SPECIES COMPLEX; CYTOTAXONOMY; ONCHOCERCIASIS; GUINEA BISSAU; WEST AFRICA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
M. Charalambous et al., "CYTOGENETICAL ANALYSIS OF THE SIMULIUM-DAMNOSUM COMPLEX (DIPTERA, SIMULIIDAE) IN GUINEA-BISSAU", Medical and veterinary entomology, 9(1), 1995, pp. 34-42

Abstract

In a 3-year study during 1990-92, larval collections of the Simulium damnosum complex from the River Corubal system in Guinea Bissau revealed that the only sibling species present were S.sirbanum and the Konkoure form of S.konkourense, but not S.damnosum s.s. which had been found at some of the localities (Saltinho and Cusselinta) in a previous survey by Quillevere et al. (1981). Their differential distributions were seasonally consistent between years. S.sirbanum was concentrated in the upper reaches of the Corubal, moving downstream at the end of the dry season to exploit new breeding grounds, whereas S.konkourense seemed to be concentrated in the lower reaches and moved upstream in the middle of the dry season. Since the previous survey, it appears that S.konkourense has largely replaced S.sirbanum and S.damnosum s.s. in thelower reaches of the Corubal. S.sirbanum was consistently associated with man-biting behaviour and, although infection studies were not performed, it is likely that S.sirbanum is the main vector of onchocerciasis in Guinea Bissau as S.konkourense does not seem to be anthropophilic. Among five polymorphic inversions in S.sirbanum, the frequency of inversion IL-B increased during the dry season; IL-2 and IIL-7 showed homozygous disadvantage whereas IIL-3 and IIIL-6 did not; IS-2 tended to be fixed in all populations. Simulium konkourense populations in the River Corubal differ from those found upstream in its tributary the River Koumba, in the Fouta Djallon of Guinea, by their sex chromosomes(having no sex-linked inversions) and biting preferences, indicating that the populations are not freely interbreeding. Inversion IIIL-X was found for the first time in populations of S.konkourense outside theFouta Djallon area and a new inversion IIL-Y was identified in samples from the Rivers Corubal and Fefine.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/09/20 alle ore 10:56:08