Spatial risk analysis on occurrences and dispersal of Biomphalaria straminea in and endemic area for schistosomiasis.

Spatial risk analysis on occurrences and dispersal of Biomphalaria straminea in and endemic area for schistosomiasis. J Vector Borne Dis. 2018 Jul-Sep;55(3):208-214 Authors: Gomes ECS, Mesquitta MCDS, Wanderley LB, de Melo FL, de Paula Souza E Guimarães RJ, Barbosa CS Abstract Background & objectives: : Schistosomiasis is a rural endemic disease that has been expanding to urban and coastal areas in the state of Pernambuco, Brazil. The aim of this study was to characterize the distribution of breeding sites of the causative vector, Biomphalaria straminea in an endemic municipality for schistosomiasis and to present the predictive models for occurrences and dispersal of this vector snail to new areas. Methods: : A malacological survey was conducted during January to December 2015 in the municipality of São Lourenço da Mata, Pernambuco, Brazil to identify the breeding sites of Biomphalaria. Faecal contamination was determined by means of the Colitag™ diagnostic kit. Rainfall data were collected, and correlated with snail distribution data. Kernel density estimation, kriging and maximum entropy (MaxEnt) modeling were used for spatial data analysis, by means of the spatial analysis software packages. Results: : Out of the 130 demarcated collection points, 64 were classified as breeding sites for B. straminea. A total of 5,250 snails were collected from these sites. Among these 64 sites, four were considered as foc...
Source: Journal of Vector Borne Diseases - Category: Infectious Diseases Tags: J Vector Borne Dis Source Type: research