Levantamento malacológico, identificação de moluscos e cercárias transmissoras de Schistosoma mansoni no município de Arcos - Minas Gerais

Abstract

Introduction: Schistosomiasis is considered a public health problem in Brazil, its transmission occurs in sweet water environments inhabited by mollusks of the species Biomphalaria glabrata, B. straminea and B. tenagophila, being its relevant identification for the control and epidemiology of this parasitose. Objectives: The present study aimed to identify the risk areas for transmission of Schistosoma mansoni in the municipality of Arcos-MG, through the malacological survey and characterization of emergent cercariae. Methodology: The molluscs were manually collected with the aid of tongs and sieves, placed in polystyrene boxes and transported for analysis in the Microscopy laboratory of UNIFOR-MG. In the laboratory the measurement and identification of the molluscs through the taxonomic characteristics was carried out. Then the species were separated and the characterization of the cercariae emerged under a microscope. Results: 6445 mollusks and identified four species were collected, Physa marmorata, Biomphalaria glabrata, Lymnaea columella and B. tenagophila. You gave copies 27 were positive for larvas of trematodes, being 11,1% of the species B. glabrata, where 7,2% were positive for cercárias of S. mansoni and 3,7% for cercárias of Echinostoma sp. Other 88,9% mollusks of the species Physa marmorata were infected, being 55,6% for cercárias of the type Xifideocercária and 33,3% for cercárias Echinostoma sp. Conclusion: The study of the malacofauna was extremely important, because mollusks transmitting schistosomiasis were identified, placing the area at risk for the transmission of schistosomiasis, in addition to the encounter of molluscs, other molluscs releasing larvae from other species of trematodes that represent risks for the transmission of diseases of medical and veterinary interest.