Longitudinal spatial distribution of aedes aegypti (Diptera: Culicidae) during the yellow fever epidemic in Angola, 2016

Abstract

Background and aims:Angola is one of the countries included in the endemic areas of yellow fever transmission in Africa. The objective of this study was to obtain information about the longitudinal spatial distribution and the mainly breeding sites of Ae. aegypti in Angola during the yellow fever epidemic in Angola during 2016.Methods: Angola is located in the western region of Southern Africa. The country limited by the Atlantic Ocean in the west, in the north with the Republic of Congo and the Democratic Republic of Congo, in the eastern with the Republic of Zambia, and in the south with the Republic of Namibia. It is divided in 18 provinces. The sampling was carried out in 51 municipalities distributed in all provinces, in villages and neighborhoods with suspicious and confi rmed cases of yellow fever during February-October 2016. The number of houses inspected was 20 only one time during the months for to determine presence or absence of Aedes aegypti.Results: Ae. aegypti presence was observed in 16/18 (88.8%) of the province 42/51 (82.3%) of the municipalities and 241/277 (87%) of the villages or neighborhoods sampled. Fifteen news municipalities that represent new records for Ae. aegypti presence in Angola were notifi ed. Ae. aegypti larvae were collected in 22 types of containers, mainly in water storage containers followed by plants in water and potted, artifi cial miscellaneous containers and used car tires in Luanda. Conclusions:This work expanded the knowledge on distribution and breeding sites of Ae. aegypti in Angola.

Potential of Aedes albopictus and Aedes aegypti (Diptera: Culicidae) to transmit yellow fever virus in urban areas in Central Africa

“…Indeed, between 2015 and 2016 in Central Africa, major urban YF outbreaks occurred in Angola and Democratic Republic of Congo with 7,334 suspected cases, of which 962 have been confirmed, and 393 deaths [6]. Aedes aegypti was suspected as the main YFV vector involved during the Angola outbreak due to its high densities reported across the country [7]. On the other hand, recent studies on entomological surveillance in Central Africa particularly in Cameroon [8] and the Republic of Congo [9], where sporadic cases of YF were frequently reported, showed that Ae.…”

“…luteocephalus . From 2010 to 2016, 13,837 suspected cases of YF were reported of which 109 cases were confirmed with 66% mostly in rural areas [7]. The epidemiological importance of both vectors in urban YFV transmission in Central Africa has not been assessed precisely up to now.…”