Frequency, diversity, and productivity study on the Aedes aegypti most preferred containers in the city of Manaus, Amazonas, Brazil

Abstract

The most preferred containers by Aedes aegypti were studied April and July (rainy and dry periods) in two Manaus neighbourhoods. In all, 2,700 premises and 13,912 containers were examined, most (87%) recorded outdoors. Out of the 13,100 inspected premises, only 1.6% showed to be positive for Aedes aegypti, summing up to 7,916 collected samples. Most frequently found containers outdoors in either neighbourhood regardless of rain or dry period were Bottles flasks and Storage, and indoors, Fixed, Flowerpots, and buckets. Productivity was estimated according to the number of premises and positive containers investigated, showing the actual container groups productivity. Considering both rainy and dry periods outdoors at Praça 14 the groups of Tyre, Flask, Bottle, Construction Equipment and Fixed, had the highest averages respectively. Construction Equipment and Flask groups were the most productive in Coroado in April. Flask, Construction Equipment and Storage groups stood out in July.

Variation in Aedes aegypti (Linnaeus) (Diptera, Culicidae) infestation in artificial containers in Caxias, state of Maranhão, Brazil

“…In the southeast, the flasks and drains groups were most commonly found to have immature forms of the vector in domiciles in the City of São Paulo, and a similar result was noted for the grease traps in the City of Rio de Janeiro 24,25 . Another study carried out in the north, in Manaus, Amazonas, found that the flasks and tires groups accounted for the largest number of larvae and pupae 17 . This shows that the potential types of breeding sites of A. aegypti vary according to the environmental conditions in each region.…”

“…This mosquito can persist and disperse widely within Brazil as a result of the wide availability of artificial containers in urban areas, a phenomenon that is well described and discussed in the literature 8,16,17 .…”

Detection of dengue virus serotype 3 by reverse transcription-polymerase chain reaction in Aedes aegypti (Diptera, Culicidae) captured in Manaus, Amazonas

“…aegypti indexes, and the lack of public health services, especially during the rainy season (December to June), when the clean rainy water promotes extensive breeding sites of Ae. aegypti, but also results in better geographical spread (Vasconcelos et al1999, Pinheiro & Tadei 2002.…”

“…In the Amazon Region, environmental and social factors, such as high temperature and humidity during the year, the extended rainy season, and pour basic infrastructure, provides ideal conditions for the proliferation of dengue vectors reproduction (Vasconcelos et al1999, Pinheiro & Tadei 2002.…”

Detecção e tipagem de vírus dengue em Aedes aegypti (Diptera: Culicidae) na Cidade de Manaus, Estado do Amazonas

“…Em Manaus, a urbanização precária com a existência de numerosas invasões de terra e falta de saneamento básico regular associada às condições climáticas de temperatura alta, umidade e índices de chuva são fatores que favorecem a proliferação e dispersão do vetor da dengue 19 .…”