Distribución espacial y temporal de los sitios de cría de aedes albopictus (Diptera: Culicidae) en La Habana, Cuba / Spatial and temporal distribution of breeding sites of aedes albopictus (Diptera: Culicidae) in Havana, Cuba

INTRODUCCIÓN: Aedes albopictus es un mosquito originario de las selvas del sudeste de Asia, que en las últimas décadas está extendiéndose a todos los continentes. Ésta especie se registró por primera vez en Cuba en la provincia La Habana en 1995. OBJETIVO: determinar la distribución espacial y temporal de los sitios de cría de Ae. albopictus en los municipios de la provincia de La Habana durante el 2011 y 2012. MÉTODOS: se realizó el muestreo de todos los depósitos conteniendo agua en los bloques o manzanas, así como, en los terrenos baldíos presentes en las áreas urbanas y peri urbanos del universo de cada municipio que compone la provinciaLa Habana. RESULTADOS: Ae. albopictus se registró en 13 de los 15 municipios del área estudiada, lo que evidencia además de su introducción su dispersión en el área. Se encontró una mayor presencia de Ae. albopictus en los municipios periféricos tales como Playa, La Lisa, Boyeros, Arroyo Naranjo, Cotorro, Guanabacoa y Habana del Este.Se encontró un incremento en el total de muestras en el 2012 con respecto al 2011notándose en ambos años un incremento a partir de junio hasta octubre. La mayor cantidad de muestras de Ae. albopictus con más de una especie de culícido correspondieron en ambos años a los meses de lluvia (mayo-septiembre). CONCLUSIONES: se constató la presencia y distribución de Ae. albopictus en La Habana favorecido por las condiciones ecológicas existentes y la disponibilidad de sitios de cría(AU)

INTRODUCTION: Aedes albopictus is a mosquito native to the forests of Southeast Asia which has spread to all continents in recent decades. The species was first reported in Cuba in the province of Havana in 1995. OBJECTIVE: determine the spatial and temporal distribution of breeding sites of Ae. albopictus in the municipalities of the province of Havana in 2011 and 2012. METHODS: sampling was conducted of all containers with water in residential areas and vacant lots of urban and suburban zones of all municipalities in the province of Havana. RESULTS: presence of Ae. albopictus was reported in 13 of the 15 municipalities in the study area, revealing not only its introduction but also its spread in the area. The greatest presence of Ae. albopictus was found in peripheral municipalities like Playa, La Lisa, Boyeros, Arroyo Naranjo, Cotorro, Guanabacoa and Habana del Este. An increase in the total number of samples was observed in 2012 with respect to 2011. In both years there was an increase from June to October. Again in both years, the greatest number of samples of Ae. albopictus with more than one culicid species was found in the rainy season (May to September). CONCLUSIONS: the presence and distribution of Ae. albopictus in Havana was confirmed. Favorable ecological conditions and the availability of breeding sites play a decisive role in such presence and distribution(AU)

Seasonal prevalence of Aedes aegypti immatures in Kolkata, India.

Dengue and dengue hemorrhagic fever (DHF) is recurring in India in recent years, affecting many cities including Kolkata (Calcutta). In view of this, a survey of three years was carried out on the prevalence of immatures of the vector mosquito Aedes aegypti in the city of Kolkata. Mosquito immatures were found throughout the year with fluctuating densities in the habitats surveyed. An index of density of immatures (I/S)m employed in the study revealed that in the months of August and September a peak in abundance occurs, irrespective of the habitats, with the values ranging between 1.12 and 11.4. The (I/S)m values were low during the months of April and May ranging between 0.4 and 3.8. As larval habitats, earthen containers and the sewage drains were positive throughout the year, while during the months of December to February, air-coolers and conditioners as habitats remained totally dry, without immature Ae. aegypti. The number of positive sites and monthly density between the habitat types were significantly different with an I/S- value (for a year) ranging between 2.64 (air-coolers) and 4.97 (earthen containers). The survey, while providing preliminary baseline data on immature abundance in Kolkata, calls for continuous entomological surveillance using standard protocols as carried out in Thailand for the vector management program against dengue.