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The potential for dispersal of onchocerciasis in Ecuador in relation to the distribution of the vector Simulium exiguum (Diptera: Simuliidae)
Mem. Inst. Oswaldo Cruz ; 92(2): 153-6, Mar.-Apr. 1997. mapas
Artículo en Inglés | LILACS | ID: lil-184963
RESUMEN
The future dispersal of onchocerciasis in Ecuador is dependent on the distribution of cytotypes of the vector species complex Simulium exiguum. Over the last 14 years, collections of larvae have been made from over 25 rivers, between 80-1600 m altitude, from various sites on both sides of the Andes, Analysis of larval polytene chromosomes was used to determine the distributions of each cytotype. On the western side of the Andes, the Cayapa cytotype (the only cytotype directly incriminated as a vector) has a distribution from Santo Domingo de los Colorados northwards. The Quevedo and Bucay cytotypes occurs from Santo Domingo de los Colorados southwards. On the eastern side of the Andes, the Aguarico cytotype occurs in the Rio Aguarico and a new cytotype is present in the tributaries of the Rio Napo. Whether the disease will spread south of Santo Domingo and on the eastern side of the Andes depends on vector capacity and the dispersal patterns of individuals infected with onchocerciasis. At present the Aguarico, Bucay and Quevedo cytotypes are known to be efficient hosts, but their biting preferences and biting densities have not yet been evaluated.
Asunto(s)
Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Oncocercosis / Simuliidae Límite: Animales País/Región como asunto: America del Sur / Ecuador Idioma: Inglés Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: Medicina Tropical / Parasitología Año: 1997 Tipo del documento: Artículo

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Oncocercosis / Simuliidae Límite: Animales País/Región como asunto: America del Sur / Ecuador Idioma: Inglés Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: Medicina Tropical / Parasitología Año: 1997 Tipo del documento: Artículo