Parasitos de interesse sanitário em esgotos do município de Picuí-PB

Abstract

The present work aimed to analyze samples of free sewage in the city of Picuí-PB, in order to carry out a survey of gastrointestinal parasites of human and animal importance. To this end, sewage sludge was used as the material to be processed and evaluated. The methods used were routine coprological techniques, after having undergone positive pilot tests for this: Ritchie's method (1948) and Faust's method (1938). Ten free sewers were evaluated in the urban perimeter, which represented a larger sample of the population in that location. Small collections of sewage along the city's outskirts, originating from one or a few residences, were discarded. Of the ten collection points, eight were positive for parasites of health interest. The parasites and their stages found were: eggs of Ascaris lumbricoides, eggs of strongyles, eggs of Hymenolepis diminuta, rhabditoid larvae of hookworms and Strongyloides stercoralis and vacuolar forms of Blastocystis sp. Among these, the most frequent was H. diminuta, appearing in 40% of the sites evaluated; Blastocystis sp. and strongyles appeared in 30% of the samples; the rest, by 10%. It is believed that the low variety of parasites found is due to the low sensitivity of the methods used, which are not the most suitable for parasitological research in sewage.