Effect of Environmental Disturbance onthe Population of Sandflies and Leishmania Transmission inan Endemic Area of VenezuelaReport as inadecuate

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Journal of Tropical Medicine - Volume 2014 2014, Article ID 280629, 7 pages -

Research Article

LAPEX-Laboratorio de Parasitología Experimental, Departamento de Biología, Facultad de Ciencias, Universidad de Los Andes, Mérida 5101, Venezuela

LEPAMET-Laboratorio de Entomología, Parasitología y Medicina Tropical, Universidad Nacional Experimental Francisco de Miranda, Falcón 4101, Venezuela

Received 28 September 2013; Revised 1 February 2014; Accepted 3 March 2014; Published 7 April 2014

Academic Editor: Lukasz Kedzierski

Copyright © 2014 Elsa Nieves et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The exploitation of new wilderness areas with crops is increasing and traditional crop substitution has been modified by new more productive crops. The results show the anthropogenic disturbance effect on the sandflies population and Leishmania transmission in endemic areas of Venezuela. Three agroecosystems with variable degrees of ecological disturbance, forest conserved, cacao fragmented, and orangery disturbed, were selected. Four methods to sandfly capture were used; the specimens were identified and infected with Leishmania. Diversity, population structure, ANOVA, Tukey test, and simple correlation analysis were carried out. Shannon traps were able to capture 94.7% of the total sandflies, while CDC light traps, Sticky traps, and direct suction just captured 2.2%, 1.2%, and 0.9%, respectively. The results showed the effect of ecological disturbance degree on the composition of sandflies and population structure, revealing a dominance level increased but decreased on the diversity and richness of sandflies species in the greatest ecological disturbance area in relation to areas with less organic disturbance. Environments more disturbed cause adaptability of certain species such as Lutzomyia gomezi and Lutzomyia walkeri. These changes on the composition of sandflies population and structure emerging species could cause increasing of leishmaniasis transmission.

Author: Elsa Nieves, Luzmary Oraá, Yorfer Rondón, Mireya Sánchez, Yetsenia Sánchez, Masyelly Rojas, Maritza Rondón, Maria Ruja

Source: https://www.hindawi.com/


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