A field study of the survival and dispersal pattern of Lutzomyia longipalpis in an endemic area of visceral leishmaniasis in Brazil

Author(s)

Galvis-Ovallos, Fredy ^[1] ; Casanova, Claudio ^[2] ; Bergamaschi, Denise Pimentel ^[1] ; Bianchi Galati, Eunice Aparecida ^[1]

Affiliation

^[1] Univ Sao Paulo, Fac Saude Publ, Dept Epidemiol, Sao Paulo - Brazil

^[2] Secretaria Estado Saude Sao Paulo, Controle Endemias, Lab Parasitoses Flagelados, Sao Paulo - Brazil

• Document type: Journal article
• Source: PLoS Neglected Tropical Diseases; v. 12, n. 4 APR 2018.
• Web of Science Citations: 2

Abstract

Zoonotic Visceral leishmaniasis (ZVL) is a neglected tropical disease that in the Americas is caused by the infection of Leishmania infantum and the domestic dog (Canis familiaris) is the main parasite reservoir in urban areas. The parasite is mainly transmitted by populations of the sibling species Lutzomyia longipalpis that has been spreading in countries including Brazil, Argentina, Paraguay and more recently Uruguay. Although bionomic parameters such as population survival and the duration of the gonotrophic cycle are critical in evaluating vector capacity, field studies have rarely been applied to sand fly populations. The present study sought to evaluate basic bionomic parameters related to the vectorial capacity of the (S)-9-methylgermacrene-B population of the Lu. longipalpis complex in a visceral leish-maniasis area of Sao Paulo state. The daily survival rate, the duration of the gonotrophic cycle and the dispersal pattern were evaluated through the mark-release-recapture method. A total of 1,547 males and 401 females were marked and released in five experiments carried out between February 2013 and February 2014. The higher recapture rates occurred within 100 meters of the release point and the estimated daily survival rates varied between 0.69 and 0.89 for females and between 0.69 and 0.79 for males. The minimum duration of the gonotrophic cycle observed was five days. The absolute population size, calculated ranged from 900 to 4,857 females and from 2,882 to 9,543 males. Our results demonstrate a high survival rate of this vector population and low dispersal that could be associated with the presence of all necessary conditions for its establishment and maintenance in the peridomiciles of this area. Our findings contribute to the basic data necessary for the understanding of ZVL dynamics and the evaluation of the implementation of prevention and control measures. (AU)

• FAPESP's process: 11/23541-1 - AMERICAN VISCERAL LEISHMANIASIS: EVALUATION OF THE VECTORIAL CAPACITY PARAMETERS OF Lutzomyia longipalpis IN URBAN AREA IN THE SAO PAULO STATE, BRAZIL
• Grantee: Fredy Galvis Ovallos
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/03751-4 - American visceral Leishmaniasis: evaluation of the vectorial capacity parameters of Lutzomyia longipalpis in urban area in the São Paulo State, Brazil
• Grantee: Eunice Aparecida Bianchi Galati
• Support Opportunities: Regular Research Grants