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Title: Identification of potential 'hot spots' of cystic echinococcosis transmission in the province of Río Negro, Argentina
Authors: Arezo, Marcos 
Mujica, Guillermo 
Uchiumi, Leonardo 
Santillan, Graciela 
Herrero, Eduardo 
Labanchi, Jose Luis 
Araya, Daniel 
Salvitti, Juan Carlos 
Cabrera, Marta 
Grizmado, Claudia 
Calabro, Arnoldo 
Talmon, Gabriel 
Sepulveda, Luis 
Galvan, Jose Maria 
Volpe, Marcela 
Bastin, Vanesa 
Seleiman, Marcos 
Panomarenko, Oscar 
Tissot, Hebe 
Sobrino, Mariano 
Crowley, Pablo 
Daffner, Jose 
Larrieu, Edmundo 
Keywords: Equinococosis;Echinococcus granulosus;Equinococosis;Argentina;Río Negro
Issue Date: 15-Jan-2020
Journal: Acta tropica 
Cystic echinococcosis (CE) is a parasitic zoonosis caused by Echinococcus granulosus. The control program of CE of Rio Negro province, Argentina, involves annual surveillance using ultrasound (US) screening in school children, and five-year cross-sectional surveys to detect livestock farms with parasitized dogs by coproELISA with confirmation tests (Western Blot or PCR). Control program is based on deworming of dogs with praziquantel and the aim is to identify areas at risk of Cystic echinococcosis transmission to humans, using all available data sources. The information was spatially distributed in 13 program areas and, at a smaller geographical scale, in 80 Primary Health Care Centers. CoproELISA surveys involved three randomized sampling periods (2003-05, 2009-10, 2017-18), with 1790 canine fecal samples. The US surveys were conducted in 2003-08, 2009-16 and 2017-18 in 34515 children. Heat maps were created at the smallest geographic scale with QGIS 3.4.6. For the consecutive sampling periods, prevalence of positive canine fecal samples from livestock farms were 14.7, 12.1 and 7.8%, respectively, and children prevalence was 0.4, 0.2 and 0.1%, respectively. The study has been developed on a scale according to which the temporal-spatial distribution of CE allows to adjust control strategies in those areas of potential transmission of the zoonosis to humans.
Fil: Santillán, G. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas; Argentina.
DOI: 10.1016/j.actatropica.2020.105341
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