Calculating the survival rate and estimated population density of gravid Aedes aegypti (Diptera, Culicidae) in Rio de Janeiro, Brazil

Abstract

Population size and daily survival rates of disease vectors are important determinants of vectorial capacity. A mark-release-recapture experiment was conducted in a dengue endemic urban neighborhood of Rio de Janeiro, Brazil, to estimate population size, survival rate and vectorial capacity of Aedes aegypti females using back-pack aspirators and gravid sticky traps (MosquiTRAP). Estimations of the gravid female population size were different when using data gathered from just the MosquiTRAP (3,505 individuals) or aspirator (1,470). However Ae. aegypti survival rates and longevity were similar irrespective of the method of capture. Up to 26.3% of released females would be able to survive for more than 10 days, the length of time of the extrinsic incubation period. Vectorial capacity value ranged between 0.01567 and 0.4215 and the basic reproductive number (R0) was estimated to be between 0.0695 and 1.88.

Dinámica epidemiológica del dengue en Isla de Pascua

“…El valor de R 0 = 3,01 permite estimar el número potencial de picadas infectantes que puede distribuir la población de mosquitos A. aegypti a partir de un caso índice, lo que corresponde al concepto de capacidad vectorial 49-51 (CV = R 0 ) 52 . Este valor es CV = 0,502, lo que resulta consistente con estimaciones obtenidas para este mosquito en Río de Janeiro para un valor semejante de sobrevivencia (p = e -μ ): CV = 0,4215 53 . La efi ciencia vectorial 51 , entendida como la probabilidad de producir infección cuando el mosquito porta el virus (producto de la probabilidad de transporte por la probabilidad de transmisión), en nuestras simulaciones llegó a un máximo de 0,165 en el pico de la epidemia.…”

Ciclos de vida comparados de Aedes aegypti (Diptera, Culicidae) do semiárido da Paraíba

“…A caracterização destes aspectos biológicos pode, ainda, ser utilizada em modelos de previsão de riscos da doença, que são ferramentas importantes no desenvolvimento de estratégias de controle do vetor (Maciel-de-Freitas et al, 2008). O objetivo deste trabalho foi comparar os padrões de desenvolvimento entre amostras de populações de A. aegypti coletadas em diferentes regiões do semiárido paraibano.…”

Preliminary evaluation of the "Dengue-MI" technology for Aedes aegyptimonitoring and control

“…aegypti even during the dry season, when larval surveys do not detect the presence of larvae 8 . When compared to other methods for capturing adult mosquitoes, like the CDC backpack aspirator (Model 1412, John W. Hock Company, Gainesville, USA) 12 , the latter captured significantly fewer gravid females than the MosquiTRAP, whereas the Nasci captured a similar number 9 .…”