Diversity of gastrointestinal helminths among murid rodents from Northern and Northeastern Thailand

The presence of gastrointestinal helminths (GI helminths) was investigated among 725 murid rodents, trapped in various habitats of Nan, Loei and Buri Ram Provinces, Thailand. The study revealed 17 species of rodents infected with 21 species or taxonomic groups of parasites (3 trematodes, 3 cestodes, 14 nematodes and 1 acanthocephalan). The overall prevalence of infection was 57.7% (418/725). Of the gastrointestinal (GI) helminths, the dominant parasitic group was members of the family Trichostrongylidae (24.3%), followed by the cestodes Raillietina sp (17.1%) and Hymenolepis diminuta (8.6%) and the nematode Syphacia muris (8.6%). The GI helminthic infection rates were highest in Mus caroli (81.8%), Mus cervicolor (76.5%), Leopoldamys edwardsi (75.0%), Bandicota indica (71.5%) and Bandicota savilei (71.4%). Highest rodent species richness (RSR) and helminth species richness (HSR) rates were found in Loei, followed by Nan and Buri Ram. The helminth prevalence rate was higher in rodents from Nan, followed by rodents from Loei and Buri Ram. Rodents from irrigated fields had the highest infection rates followed by rodents from upland or dry agricultural areas, forests and domestic habitats. Raillietina sp, Rodentolepis nana (syn. Hymenolepis nana), Hymenol-epis diminuta, Moniliformis moniliformis and Cyclodontostomum purvisi, considered zoonotic parasites, were mainly found in rodents from domestic habitats and lowland irrigated fields. (Résumé d'auteur

Molecular Markers Applied to Conservation Genetics of American Crocodilians

The subject of this chapter is addressed seeking to establish a balanced relationship of deepening, trying to be interesting for those who are looking for information on molecular markers, while not intending to be too long in the descriptions of the techniques and providing an indication of application in molecular ecology of crocodilians that are best treated in other chapters of the book. Whenever possible, we use examples of the results of our own research with crocodilians, while mixing them with illustrative images of the techniques with the intention of making the reading interesting both for the public that wants to study other groups of living beings and for other researchers like us that falling in love by crocodilians. The application of molecular markers in each discipline within molecular ecology is presented in the next chapters: a discussion of the progress in phylogenetic studies is done at chapter three; the application of molecular markers to study phylogeography is presented in chapter four; a more accurately review of the molecular markers used to conservation genetics is done at chapter five; at chapter six parentage and mating systems of crocodilians are reviewed at the light of molecular markers and in chapter seven, examples of hybridization detected with those markers were depicted. A review of the development of molecular markers for later use in studies of molecular ecology of crocodilians in America is presented in this chapter, from the first studies with isoenzymes to the most current techniques.Fil: Barban Zucoloto, Rodrigo. Universidade Federal da Bahia; BrasilFil: Pires Farias, Izeni. Universidad Federal del Amazonas.; BrasilFil: Amavet, Patricia Susana. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias. Departamento de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentin