Role of Aedes aegypti and Aedes albopictus during the 2011 dengue fever epidemics in Hanoi, Vietnam

Pham Thi Kim Lien , Vu Trong Duoc , Laurent Gavotte (1) , Emmanuel Cornillot (2) , Phan Thi Nga (3) , Laurence Briant (4) , Roger Frutos (4, 5, 6) , Tran Nhu Duong (7)

1 UMR ISEM - Institut des Sciences de l'Evolution de Montpellier
2 LBCM - Vaccination Antiparasitaire : Laboratoire de Biologie Cellulaire et Moléculaire
3 -
4 IRIM - Institut de Recherche en Infectiologie de Montpellier
5 UMR INTERTRYP - Interactions hôtes-vecteurs-parasites-environnement dans les maladies tropicales négligées dues aux trypanosomatides
6 Cirad-BIOS - Département Systèmes Biologiques
7 RIKEN CLST - RIKEN Center for Life Science Technologies

ObjectiveTo record the human cases of dengue fever (DF) and investigate the Aedes mosquito species circulating during the Hanoi 2011 DF epidemics.Methods24 different outbreak points were recorded in 8 districts between August and December 2011.Results140 patients were hospitalized following dengue diagnostic with a predominance of males (59.3%) and the 15–34 age class. Only DENV-1 (11.27%) and DENV-2 (88.73%) serotypes were detected in human samples. Mosquito sampling performed in and around patients households revealed the predominance of Aedes aegypti (A. aegypti) (95.15%) versus Aedes albopictus (4.85%).ConclusionsThere is a positive correlation between the population density of A. aegypti and the number of human cases and duration of outbreaks. This was not observed for Aedes albopictus. Three pools of A. aegypti were positive with dengue virus, two with DENV-1 and one with DENV-2.

Domaines: Virologie

Pham Thi Kim Lien, Vu Trong Duoc, Laurent Gavotte, Emmanuel Cornillot, Phan Thi Nga, et al.. Role of Aedes aegypti and Aedes albopictus during the 2011 dengue fever epidemics in Hanoi, Vietnam. Asian Pacific Journal of Tropical Medicine, 2015, 8 (7), pp.543 - 548. ⟨10.1016/j.apjtm.2015.06.009⟩. ⟨hal-01387487⟩