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Aedes albopictus in Lebanon, a potential risk of arboviruses outbreak.


ABSTRACT: BACKGROUND: The mosquito Aedes albopictus is undergoing a worldwide expansion with potential consequences on transmission of various arboviruses. This species has been first detected in Lebanon in 2003. METHODS: We performed a phylogenetic study of Lebanese specimens and assessed their host preference by detecting human, cat, dog and chicken immunoglobulins in mosquito blood-meals. Their capacity to transmit arboviruses was investigated by providing infectious blood-meals using an artificial feeding system followed by detection of viral particles in mosquito saliva. RESULTS: Our results suggest that Lebanese strains are part of the recent wave of Ae. albopictus expansion and are related to some European, African and North American strains. They exhibited a host preference towards humans and an important capacity to transmit arboviruses. Indeed, we showed that Ae. albopictus was able to transmit chikungunya (CHIKV), dengue (DENV) and West-Nile (WNV) viruses. At day 10 after an infectious blood-meal at a titer of 108 MID50/ml, 30% of mosquitoes delivered an average of 515 ± 781 viral particles of CHIKV in saliva collected using a forced salivation technique and 55% with an average of 245 ± 304 viral particles when infected with WNV. Whereas DENV was not found in saliva at day 10 post-infection (pi), an average of 174 ± 455 viral particles was detected in 38.1% of mosquitoes tested at day 21 after an infectious blood-meal at a higher titer of 109 MID50/ml. CONCLUSION: These observations suggest that Ae. albopictus around Beirut is a potential vector of the three tested arboviruses.

SUBMITTER: Haddad N 

PROVIDER: S-EPMC3519687 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature

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Aedes albopictus in Lebanon, a potential risk of arboviruses outbreak.

Haddad Nabil N   Mousson Laurence L   Vazeille Marie M   Chamat Soulaima S   Tayeh Joelle J   Osta Mike Abboud MA   Failloux Anna-Bella AB  

BMC infectious diseases 20121114


<h4>Background</h4>The mosquito Aedes albopictus is undergoing a worldwide expansion with potential consequences on transmission of various arboviruses. This species has been first detected in Lebanon in 2003.<h4>Methods</h4>We performed a phylogenetic study of Lebanese specimens and assessed their host preference by detecting human, cat, dog and chicken immunoglobulins in mosquito blood-meals. Their capacity to transmit arboviruses was investigated by providing infectious blood-meals using an a  ...[more]

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