A role for Mansonia uniformis mosquitoes in the transmission of lymphatic filariasis in Uganda?
Identifieur interne : 007353 ( Main/Exploration ); précédent : 007352; suivant : 007354A role for Mansonia uniformis mosquitoes in the transmission of lymphatic filariasis in Uganda?
Auteurs : Ambrose W. Onapa [Ouganda] ; Erling M. Pedersen ; Claus M. Reimert ; Paul E. SimonsenSource :
- Acta tropica [ 0001-706X ] ; 2007.
Descripteurs français
- KwdFr :
- Animaux, Comportement alimentaire, Comportement animal, Culicidae (parasitologie), Culicidae (physiologie), Filariose lymphatique (immunologie), Filariose lymphatique (parasitologie), Filariose lymphatique (transmission), Humains, Microfilaria (pathogénicité), Ouganda, Vecteurs insectes (parasitologie), Vecteurs insectes (physiologie), Wuchereria bancrofti (croissance et développement), Wuchereria bancrofti (pathogénicité).
- MESH :
- croissance et développement : Wuchereria bancrofti.
- immunologie : Filariose lymphatique.
- parasitologie : Culicidae, Filariose lymphatique, Vecteurs insectes.
- pathogénicité : Microfilaria, Wuchereria bancrofti.
- physiologie : Culicidae, Vecteurs insectes.
- transmission : Animaux, Comportement alimentaire, Comportement animal, Filariose lymphatique, Humains, Ouganda.
English descriptors
- KwdEn :
- Animals, Behavior, Animal, Culicidae (parasitology), Culicidae (physiology), Elephantiasis, Filarial (immunology), Elephantiasis, Filarial (parasitology), Elephantiasis, Filarial (transmission), Feeding Behavior, Humans, Insect Vectors (parasitology), Insect Vectors (physiology), Microfilariae (pathogenicity), Uganda, Wuchereria bancrofti (growth & development), Wuchereria bancrofti (pathogenicity).
- MESH :
- growth & development : Wuchereria bancrofti.
- immunology : Elephantiasis, Filarial.
- parasitology : Culicidae, Elephantiasis, Filarial, Insect Vectors.
- pathogenicity : Microfilariae, Wuchereria bancrofti.
- physiology : Culicidae, Insect Vectors.
- transmission : Elephantiasis, Filarial.
- Animals, Behavior, Animal, Feeding Behavior, Humans, Uganda.
Abstract
The possible role of Mansonia uniformis mosquitoes in the transmission of lymphatic filariasis was assessed in an endemic area of Uganda, by examining their diurnal biting cycle, host preference and ability to support the development of experimental and natural Wuchereria bancrofti infections. Anopheles gambiae s.l. served as controls. Human landing catches revealed that outdoor biting peaked early in the evening (19:00-20:00h), while indoor biting peaked around midnight (23:00-24:00h). By far the majority of indoor collected M. uniformis had derived their blood meals from humans. Both biting and feeding behaviour were therefore compatible with a potential for transmission. In experimentally fed M. uniformis (total of 1915), the microfilariae were seen to ex-sheath and to start migration, but the L1s accumulated in the thorax and only few developed further. In dissections from Day 11 onwards, 4.6% (43/932) of M. uniformis had L2 larvae and 0.7% (7/932) had L3 larvae of W. bancrofti. The corresponding figures for An. gambiae s.l. were 13.4% and 4.6%, respectively. Dissection of wild caught M. uniformis (total of 6823) did not reveal any natural infections with W. bancrofti infective larvae, whereas wild caught An. gambiae s.l. had an infective rate of 1.3%. Other filarial species, and mermithids, were common in M. uniformis. It is concluded that M. uniformis has a limited potential to support development of W. bancrofti to the infective stage, and it does not appear to play a role as a vector under natural conditions.
DOI: 10.1016/j.actatropica.2007.01.003
PubMed: 17316535
Affiliations:
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Anopheles gambiae s.l. served as controls. Human landing catches revealed that outdoor biting peaked early in the evening (19:00-20:00h), while indoor biting peaked around midnight (23:00-24:00h). By far the majority of indoor collected M. uniformis had derived their blood meals from humans. Both biting and feeding behaviour were therefore compatible with a potential for transmission. In experimentally fed M. uniformis (total of 1915), the microfilariae were seen to ex-sheath and to start migration, but the L1s accumulated in the thorax and only few developed further. In dissections from Day 11 onwards, 4.6% (43/932) of M. uniformis had L2 larvae and 0.7% (7/932) had L3 larvae of W. bancrofti. The corresponding figures for An. gambiae s.l. were 13.4% and 4.6%, respectively. Dissection of wild caught M. uniformis (total of 6823) did not reveal any natural infections with W. bancrofti infective larvae, whereas wild caught An. gambiae s.l. had an infective rate of 1.3%. Other filarial species, and mermithids, were common in M. uniformis. It is concluded that M. uniformis has a limited potential to support development of W. bancrofti to the infective stage, and it does not appear to play a role as a vector under natural conditions.</div></front></TEI><affiliations><list><country><li>Ouganda</li></country></list><tree><noCountry><name sortKey="Pedersen, Erling M" sort="Pedersen, Erling M" uniqKey="Pedersen E" first="Erling M" last="Pedersen">Erling M. Pedersen</name><name sortKey="Reimert, Claus M" sort="Reimert, Claus M" uniqKey="Reimert C" first="Claus M" last="Reimert">Claus M. Reimert</name><name sortKey="Simonsen, Paul E" sort="Simonsen, Paul E" uniqKey="Simonsen P" first="Paul E" last="Simonsen">Paul E. Simonsen</name></noCountry><country name="Ouganda"><noRegion><name sortKey="Onapa, Ambrose W" sort="Onapa, Ambrose W" uniqKey="Onapa A" first="Ambrose W" last="Onapa">Ambrose W. Onapa</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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