The comparison between two parasitological techniques for the detection of enteroparasites in waste pickers from the south of Brazil

Abstract

Some researchers and clinical laboratories use just one technique for the detection of enteroparasites, allowing substandard findings. Enteroparasites mostly affect the socially vulnerable population, like the waste pickers. Some of these workers are gathered in cooperatives where work conditions and monthly wage are better. However, this environment is still not adequate being, sometimes, unsanitary. The objective was to study the enteroparasite prevalence and compare the two parasitological techniques in their effect measure in recyclable waste picker who were working in cooperatives in the south of Brazil. Three stool samples from 48 pickers from six cooperatives were collected in alternate days for parasite analysis. Two sample concentration techniques were used (Faust and Ritchie) and tested to verify which was the best to use. The parasite prevalence in waste picker was 62.5% (30/48), using the two techniques concurrently. When used individually, the prevalence was lower. Commensal and pathogenic helminths and protozoan were diagnosed. From the statistical analysis, it was proved that the parasitological techniques provide better results when used concomitantly, that is, when using the two techniques at the same time in three stool samples.