ArticleBMC public health2025
Risk analysis of contamination by potentially zoonotic parasites found in public squares at Southern Brazil.
Article in BMC public health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundHuman beings and animals are getting closer and closer. This proximity is not limited to the home environment, as animals are also frequenters of public spaces with access to leisure areas and human recreation. As they play the role of definitive hosts for some species of potentially zoonotic helminths and protozoa, the risk of environmental contamination through their feces and the risk of infection of other animals, including humans, increases. From an epidemiological point of view, identifying possible sites at risk of infection allows us to outline adequate control and prevention methods. Therefore, the aim of this work was to carry out a risk analysis of contamination by potentially zoonotic parasites found in public squares in Southern Brazil.
methodsSamples of dog feces and sand were collected in public squares in municipalities in the Pelotas microregion, south of Rio Grande do Sul, Brazil. The parasitological diagnosis was performed using the techniques of Willis-Mollay, Faust and Spontaneous sedimentation for feces and Caldwell and Caldwell for sand. The results were interpreted through descriptive data analysis and Generalized Linear Mixed Model (GLMM) with a binomial distribution and logit link function.
resultsIn total, 4262 samples were analyzed. where 63% of positive sand samples and 50.4% of positive feces samples were parasitized by Ancylostoma spp. Of all the municipalities in the study, Cerrito, Capão do Leão and Cristal have the highest risk for the presence of parasites in the samples collected. In addition, Pelotas and Pedro Osório municipalities had more positive samples with nematode eggs; Cristal, Cerrito and Capão do Leão had more samples positive for tapeworms; Canguçu, Morro Redondo and Turuçu showed higher positivity of protozoa.
conclusionIt is concluded that there is great contamination in the squares studied, by parasites with zoonotic potential, and among the identified parasites, Ancylostoma spp. is the most frequent. Furthermore, it is suggested that small municipalities are at greater risk of presenting parasites in public spaces, such as squares.
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