Larval stages of trematodes in gastropods from Lake Chicnahuapan, State of Mexico, Mexico

Abstract

During the period from January to December (2007), 1,095 freshwater molluscs of four species were captured (Lymnaea stagnalis, Stagnicola elodes, Physella cubensis and Physa acuta) in Lake Chicnahuapan, State of Mexico, Mexico. Two hundred seventy-two (24.84% prevalence) of these molluscs were parasitised by 11 trematode species (from which two were not identified at the species level) having six cercariae species and five metacercariae species represented in five families. The cercariae Telorchis corti (Plagiorchiidae) and the metacercariae Cotylurus cornutus (Strigeidae) were the species with the highest prevalence among the examined snails. The highest percentage of infection was observed in L. stagnalis (27.45% of prevalence, n = 572) and P. cubensis (23.96%, n = 455). Twenty-one of the examined snails had multiple infections with up to three trematode species.

Helmintos gastrointestinales en aves acuáticas de la subcuenca alta del río Lerma, México

“…Fedynich y Pence (1994) señalaron que la comunidad de helmintos se ve influenciada por su distribución estacional y abundancia en los hospederos migratorios, cuya vagilidad facilita el intercambio de los parásitos; sin embargo, Gladden y Canaris (2009) sugieren que los helmintos se pierden durante la ruta migratoria y su reemplazo se lleva a cabo en las áreas de invierno. En la zona de estudio que abarca este trabajo, Barragán-Sáenz et al (2009) registraron cercarias de Notocotylus sp., y metacercarias de C. cornutus, E. revolutum y E. recurvatum en caracoles de agua dulce, mientras que Sánchez-Nava et al (2004) registraron metacéstodos de Cyclustera ralli en Girardinichthys multiradiatus. El hallazgo previo de estas fases Figura 2.…”

Mediterranean essential oils as effective weapons against the West Nile vector Culex pipiens and the Echinostoma intermediate host Physella acuta: what happens around? An acute toxicity survey on non-target mayflies

“…1a) and the invasive freshwater snail Physella acuta (Draparnaud) (Mollusca: Physidae) (Fig. 1b), an important intermediate host for many parasites (Toledo et al 1999(Toledo et al , 2000Faltýnková 2005;Faltýnková and Haas 2006;Muñoz-Antoli et al 2006Barragán-Sáenz et al 2009;Kraus et al 2014), including the worldwide distributed trematode Echinostoma revolutum Looss (Echinostomida: Echinostomidae) and the nematode Parastrongylus cantonensis (Chen) (Rhabditida: Angiostrongylidae) (Hai et al 2009). The acute toxicity of A. millefolium and H. tuberculatum was also assessed on a non-target aquatic organism sharing the same ecological niche of C. pipiens larvae and P. acuta snails, the nymphs of the mayfly Cloeon dipterum L. (Ephemeroptera: Baetidae) (Fig.…”

Morphological and molecular assessment of the diversity of trematode communities in freshwater gastropods and bivalves in Los Tuxtlas tropical rainforest

“…In Mexico, very few studies have characterized the morphology of cercariae in their first intermediate hosts (e.g. Lamothe-Argumedo et al ., 1983; Rangel-Ruíz & Lamothe-Argumedo, 1986; Ditrich et al ., 1997; Scholz et al ., 1996; Barragán-Sáenz et al ., 2009). To the best of our knowledge, this is the first study addressing the overall genetic diversity and morphological characterization of trematode cercariae in a particular region of Mexico.…”