Larval trematodes in freshwater gastropods from Mato Grosso, Brazil: diversity and host-parasites relationships

Abstract

trematodes in freshwater gastropods from Mato Grosso, Brazil: diversity and host-parasites relationships. Biota Neotrop. 13(4): http://www.biotaneotropica.org.br/v13n4/en/abstract?article+bn00613042013Abstract: A survey for freshwater gastropods carrying trematodes parasites was conducted in Manso Dam and the surrounding areas frequented by tourist, focusing particularly on the Pantanal region. Infected snails were recovered from twelve of the eighteen investigated municipalities and forty-one cercaria-snail pairings were recorded. Among these pairings were several first records of snails serving as intermediate hosts for trematodes in Brazil including Biomphalaria amazônica Paraense, 1966, Biomphalaria occidentalis Paraense, 1981, Marisa planogyra Pilsbry,1933, Pomacea maculata Perry, 1830, Pomacea scalaris (d'Orbigny, 1835 and Gundlachia radiata (Guilding, 1828). Echinostomatidae and Strigeidae were the most common trematode families (ca. 47%) and the greatest diversity of larvae were obtained from Drepanotrema lucidum (Pfeiffer, 1839). Paramphistomatidae, Schistosomatidae or Spirorchiidae and Notocotylidae or Pronocephalidae were recovered in D. lucidum for the first time extending the number of families which use this gastropod as intermediate host. Although no specimens were found harboring larval stages of Schistosoma mansoni Sambon, 1907 other trematode larvae were discovered, including the Schistosomatidae Brevifurcate apharingeate cercaria that can cause dermatitis in humans. Continued studies on the taxonomy and biology of trematodes are essential to better understand the biodiversity of these parasites as well as the epidemiological aspects for control of associated zoonosis. Resumo: Foi realizado um levantamento de trematódeos em gastrópodes límnicos provenientes da área da Usina Hidrelétrica de Manso e das proximidades com potencial turístico, como a região do Pantanal. Moluscos parasitados foram encontrados em doze dos dezoito municípios investigados e quarenta e uma interações cercária-gastrópode límnico foram observadas, entre elas Biomphalaria amazônica Paraense, 1966, Biomphalaria occidentalis Paraense, 1981, Marisa planogyra Pilsbry, 1933, Pomacea maculata Perry, 1830, Pomacea scalaris (d'Orbigny, 1835 and Gundlachia radiata (Guilding, 1828) atuando pela primeira vez no Brasil como hospedeiros intermediários de trematódeos. Echinostomatidae e Strigeidae foram as famílias de maior ocorrência (ca. 47%) e a maior variedade de tipos cercarianos foi encontrada em Drepanotrema lucidum (Pfeiffer, 1839). Paramphistomatidae, Schistosomatidae or Spirorchiidae and Notocotylidae or Pronocephalidae foram reportadas pela primeira vez em D. lucidum ampliando o número de famílias que utilizam esse gastrópode como hospedeiro intermediário. Embora nenhum espécime tenha sido encontrado com formas larvais de Schistosoma mansoni Sambon, 1907, outros trematódeos foram observados, como Brevifurcate apharingeate cercaria da família Schistosomatidae que pode causar dermatite no homem. Estudos sobre a taxonomia e a ...

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