First record of Cotylurus metacercariae (Trematoda: Strigeidae) in Biomphalaria straminea (Planorbidae) from Argentina: morphological and molecular identification

• Autorzy: Fernandez M.V. , Hamann M.I. , Davies C. , Lauthier J.J. , Davies D.
• Języki publikacji: EN

Abstrakty

EN

In the study of the biology of trematode species, the knowledge of the larval stages in snail hosts is important to elucidate their complete life cycle. The goal of the present study was to describe a new tetracotyle-type metacercaria found in the freshwater mollusk Biomphalaria straminea sampled in a rice field from Corrientes province, Argentina. To this end, 1,768 snails were collected from the cultivated plots and irrigated channels during the flooding periods (from the time of sowing to soon after rice harvesting) between December 2016 and May 2017. We used morphological and molecular analysis to characterize the tetracotyle-type metacercariae. Its morphological traits and the internal transcribed spacers (ITS1 and ITS2 plus 5.8S; ~1200 pb) from nuclear ribosomal DNA (rDNA) were amplified and sequenced. From 1,768 specimens of B. straminea screened, 52 were found infected with metacercariae of tetracotyle type (2.9%) that were identified as Cotylurus genus. A total of 218 metacercariae were found encysted in the ovotestis or between the mantle and viscera of B. straminea. Bioinformatic analysis showed that the metacercarial rDNA sequences shared 94% identity with those of Cotylurus gallinulae from Mexico and 100% identity with those of Cotylurus sp. from Brazil. In this study, the morphological descriptions are supplemented with the first molecular identification of a metacercaria related to Cotylurus parasitizing planorbids from Argentina. Also, our study provides a new morphological description in B. straminea, thus broadening the geographical distribution. The life cycle of this Cotylurus metacercariae is unknown and there are no reports of adult stages parasitizing waterfowl in Argentina.

• Wydawca: -
• Czasopismo: Annals of Parasitology
• Rocznik: 2022
• Tom: 68
• Numer: 3
• Opis fizyczny: p.473-481,fig.,ref.

Twórcy

autor

Fernandez M.V.

• Centro de Ecología Aplicada del Litoral (CECOAL). Consejo Nacional de Investigaciones Científicas y Tecnicas (CONICET), Corrientes, Argentina

autor

Hamann M.I.

• Centro de Ecología Aplicada del Litoral (CECOAL). Consejo Nacional de Investigaciones Científicas y Tecnicas (CONICET), Corrientes, Argentina

autor

Davies C.

• Instituto de Patología Experimental, CONICET - Universidad Nacional de Salta, 4400, Salta, Argentina

autor

Lauthier J.J.

• Department of Parasitology, Kochi Medical School, Kochi, Japan

autor

Davies D.

• Facultad de Ciencias Naturales, Universidad Nacional de Salta, Av. Bolivia 5150, 4400, Salta, Argentina

Identyfikatory

DOI

10.17420/ap6803.453