Centro de Ciências Exatas e da Terra
URI Permanente desta comunidadehttps://repositorio.ufrn.br/handle/1/135
Navegar
Navegando Centro de Ciências Exatas e da Terra por Assunto "Aedes aegypti"
Agora exibindo 1 - 2 de 2
- Resultados por página
- Opções de Ordenação
Artigo Seasonal variation of potential flavivirus vectors in an urban biological reserve in northeastern Brazil(Journal of Medical Entomology, 2009-11) Medeiros, Arlinete S.; Marcondes, Carlos B.; Azevedo, Paulo R. M. de; Jerônimo, Selma M. R.; Silva, Virginia P. Macedo e; Ximenes, Maria de Fátima Freire de MeloAlthough yellow fever (YF) has not been reported on the eastern coast of Brazil since 1942, there was a reemergence of dengue fever in Brazil in 1987 due to the reintroduction of Aedes aegypti (L.). To assess areas of potential risk for transmission of vector-borne diseases, a surveillance system was placed in a large Atlantic Forest reserve in Natal, Rio Grande do Norte, Brazil, where in 2004 unexplained epizootics were reported among marmosets. The etiologic agent causing the mortality in marmosets has not been identiÞed. Wyeomyia bourrouli Lutz, Haemagogus leucocelaenus Dyar & Shannon, Ae. aegypti, Aedes albopictus (Skuse), Ochlerotatus scapularis Rondani, Ochlerotatus serratus Theobald, Ochlerotatus taeniorhynchus Wiedemann, Culex quinquefasciatus Say, and Limatus durhami Theobald were collected in the park and in the proximity of the households adjacent to the park. Seasonal abundance ßuctuation was signiÞcant for Ae. aegypti, Ae. albopictus, Ochlerotatus scapularis (Rondani), and Hg. leucocelaenus. Eggs of Ae. aegypti, Ae. albopictus, and Hg. leucocelaenus were more frequently found at the conclusion of the rainy season. A signiÞcant negative correlation between the number of Ae. albopictus collected and temperature was observed (r 0.50), i.e., for each 1 C increase in temperature, the number of specimens collected decreased eight-fold. The Þndings reported herein reinforce the need for a sustainable arboviral surveillance program in this area to decrease the potential risk of emergence of vector borne diseases as YF.Artigo The Dengue risk transmission during the FIFA 2014 World Cup(arXiv, 2014) Lucio, Paulo S.; Degallier, Nicolas; Spyrides, Maria H. C.; Silva, Cláudio Moisés Santos e; Silva, Julio C. B. da; Silva, Helder J. F. da; Máximo, Geovane; Junior, Walter; Mesquita, MichelDengue is a persistent threat to Brazilians. The twentieth FIFA World Cup will take place in Brazil in June and July this year. This paper warning that Dengue fever could be not a significant problem in competition locations. Temperature is a very strong predictor of suitability for Dengue and it seems evident that relative humidity measurements are less satisfactory in biological (ecological, entomological or even in epidemiological studies) work as indicator of atmospheric factors influencing evaporation than are measurements of vapor pressure deficit. In fact, the vapour pressure deficit is a much more sensitive indicator of water vapor conditions of the atmosphere and undergoes greater variations for temperature changes than does the relative humidity. Further, relative humidity alone gives no indication of the rate of evaporation while the vapour pressure deficit alone does give an indication of the evaporation rates, then areas having the same vapour pressure deficit do influence evaporation rates in the same way whether temperature are identical or not. It is the reason why vapour pressure deficit was chosen in this study. Human and mosquito populations associated with precipitation are good predictors of Dengue in suitable places but don’t capture the whole picture. The determinants of Dengue virus transmission is composition of suitable climate, susceptible people and competent mosquitos virus interactions. For the 2014 World Cup twelve host cities the Dengue risk transmission will be not close to its peak when matches will be played, because this is a non epidemic period overall the brazilian territory. Despite the low risk – it always exists - the Brazilian authorities must communicate this fact and what protective measures FIFA World Cup fans should be take. In fact, the risk of an outbreak of dengue fever during the upcoming soccer World Cup in Brazil is not serious enough to warrant a high alert in the host cities, according to an early warning system for the disease.