Seasonal population dynamics of the primary yellow fever vector Haemagogus leucocelaenus (Dyar & Shannon) (Diptera: Culicidae) is mainly influenced by temperature in the Atlantic Forest, southeast Brazil

BACKGROUNDSoutheast Brazil has recently experienced a Yellow Fever virus (YFV) outbreak where the mosquito Haemagogus leucocelaenus was a primary vector. Climatic factors influence the abundance of mosquito vectors and arbovirus transmission. OBJECTIVESWe aimed at describing the population dynamics...

Full description

Saved in:
Bibliographic Details
Published in:Memórias do Instituto Oswaldo Cruz 2020-01, Vol.115, p.e200218-e200218
Main Authors: Couto-Lima, Dinair, Andreazzi, Cecilia S, Leite, Paulo José, Bersot, Maria Ignez Lima, Alencar, Jeronimo, Lourenço-de-Oliveira, Ricardo
Format: Article
Language:English
Subjects:
mosquito ecology
Original
oviposition
PARASITOLOGY
rainfall
Rio de Janeiro
temperature
TROPICAL MEDICINE
yellow fever
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:BACKGROUNDSoutheast Brazil has recently experienced a Yellow Fever virus (YFV) outbreak where the mosquito Haemagogus leucocelaenus was a primary vector. Climatic factors influence the abundance of mosquito vectors and arbovirus transmission. OBJECTIVESWe aimed at describing the population dynamics of Hg. leucocelaenus in a county touched by the recent YFV outbreak. METHODSFortnightly egg collections with ovitraps were performed from November 2012 to February 2017 in a forest in Nova Iguaçu, Rio de Janeiro, Brazil. The effects of mean temperature and rainfall on the Hg. leucocelaenus population dynamics were explored. FINDINGSHg. leucocelaenus eggs were continuously collected throughout the study, with a peak in the warmer months (December-March). The climatic variables had a time-lagged effect and four weeks before sampling was the best predictor for the positivity of ovitraps and total number of eggs collected. The probability of finding > 50% positive ovitraps increased when the mean temperature was above 24ºC. The number of Hg. leucocelaenus eggs expressively increase when the mean temperature and accumulated precipitation surpassed 27ºC and 100 mm, respectively, although the effect of rainfall was less pronounced. MAIN CONCLUSIONSMonitoring population dynamics of Hg. leucocelaenus and climatic factors in YFV risk areas, especially mean temperature, may assist in developing climate-based surveillance procedures to timely strengthening prophylaxis and control.
ISSN:0074-0276
1678-8060
1678-8060
DOI:10.1590/0074-02760200218