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Free Content Occurrence, productivity and spatial distribution of key-premises in two dengue-endemic areas of Rio de Janeiro and their role in adult Aedes aegypti spatial infestation pattern

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Summary Objectives  To evaluate: (1) the occurrence, maintenance, productivity, spatial distribution and premise condition index score of -infested houses and key-premises in a suburban district (Tubiacanga) and a slum (Favela do Amorim) of Rio de Janeiro and (2) the role of these factors in adult female spatial distribution. Methods and Results  A total of 2456 premises were inspected for immature and 1100 for adult collection. Key-premises corresponded to 16.08% and 17.86% of infested houses in Tubiacanga, and 13.5% and 11.1% in Favela do Amorim, during the dry and wet seasons, respectively. Key-premises held significantly more immature , pupae and larvae than infested houses in Favela do Amorim and Tubiacanga during the dry and wet seasons. In Favela do Amorim, key-premises had a significantly higher PCI score than infested but non-key houses. Conclusion  The spatial distribution of key-premises and adult females was often congruent, indicating that key-premises influence the infestation pattern observed in the study areas.


Evaluer (1) l’apparition, le maintient, la reproduction, la répartition spatiale et le score d’indice des conditions de prémisse (PCI) des maisons infestées par Ae. Aegypti et des prémisses principaux dans un district de banlieue (Tubiacanga) et un bidonville (Favela do Amorim) de Rio de Janeiro et (2) le rôle de ces facteurs dans la distribution spatiale des femelles adultes d’Ae. aegypti. Méthodes et résultats: 

2456 prémisses ont été inspectées pour la collecte d’insectes immatures et 1100 prémisses pour celle d’insectes adultes. Les prémisses principales correspondaient à 16,08% et 17,86% des maisons infestées à Tubiacanga, et 13,5% et 11,1% dans la Favela do Amorim, durant les saisons sèches et pluvieuses respectivement. Les prémisses principales renfermaient significativement plus d’Ae. aegypti immatures, de larves et de pupes que les maisons infestées dans la Favela do Amorim et à Tubiacanga durant les saisons sèches et pluvieuses. Dans la Favela do Amorim, les prémisses principales avaient un score PCI beaucoup plus élevé que maisons infestées mais qui n’étaient pas des prémisses principales. Conclusion: 

La distribution spatiale des prémisses principales et des femelles adultes d’Ae. aegyptiétait souvent harmonieuse, indiquant que les prémisses principales influencent le profil d’infestation observé dans les régions étudiées.
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Keywords: Control del Dengue; Diphtérie; Diptera; ICP; PCI; container productivity; conteneurs de reproduction; contrôle de la dengue; dengue control; distribución espacial; productividad; répartition spatiale; spatial distribution; surveillance; vigilancia

Document Type: Research Article

Affiliations: 1:  Laboratório de Transmissores de Hematozoários, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil 2:  Escola Nacional de Saúde Pública Sérgio Arouca, Rio de Janeiro, Brazil

Publication date: 2008-12-01

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