Affinity and diversity indices for anopheline immature forms

Revista do Instituto de Medicina Tropical de São Paulo

Lucy Nagm²  José Francisco Luitgards-moura²  César De Souza Neucamp²  Fábio Saito Monteiro-de-barros²  Nildimar Alves Honório¹  Pantelis Tsouris¹  Maria Goreti Rosa-freitas¹ 

[1] ,Universidade Federal de Roraima Centro de Ciências Biológicas e da Saúde Núcleo Avançado de VetoresBoa Vista Roraima ,Brasil

关键词: Anophelines;    Immatures;    Roraima;    Brazil;   

DOI  :  10.1590/S0036-46652007000500007

来源: SciELO

【 摘 要 】

As for the entire Amazon Region, malaria continues to be a major health public problem in Roraima that presented an Annual Parasitic Index of 85.4 in 2005, the highest in Brazil. Information on anopheline breeding sites is an essential component in malaria control strategies. Aiming to contribute to the limited knowledge on anopheline immature forms in Roraima, collections and breeding site observations were performed in 10 breeding sites around the capital city Boa Vista. Collections were carried out in the rainy and dry season periods between April 2004 and January 2005. Breeding sites comprised natural and artificial water reservoirs. A total of 623 immature forms were collected belonging to Anopheles albitarsis s.l., An.triannulatus s.l., An. nuneztovari/dunhami, An. braziliensis, An. evansae, An. oswaldoi s.l., An. strodei and An. darlingi. An. albitarsis and An. braziliensis were the most frequently found species. Eight larvae of An. darlingi were found in only one breeding site located in the forest. An. triannulatus/An. nuneztovari and An. albitarsis/An. braziliensis were the pairs of species that mostly occurred together. Both pair of species displayed the highest affinity index what might indicate a high compatibility for the same breeding conditions and/or a synergistic co-occurrence. Species diversity index was higher for the dry season.

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