Genotypic characterization and species identification of Fasciola spp. with implications regarding the isolates infecting goats in Vietnam.

Ribosomal RNA sequences (361 or 362bp) of the second internal transcribed spacer 2 (ITS-2) and a portion of mitochondrial cox1 (423bp) for Fasciola spp. obtained from specimens collected in indigenous and hybrid goats and sheep in Vietnam were characterized for genotypic status and hybridization/introgression. Alignment of 48 ITS-2 sequences (also those from goats and sheep in this study) indicates that F.

Human fascioliasis and the presence of hybrid/introgressed forms of Fasciola hepatica and Fasciola gigantica in Vietnam.

The two species common of liver fluke, Fasciola hepatica and Fasciola gigantica, cause human fascioliasis. Hybrids between these species, and introgressed forms of Fasciola, are known from temperate and subtropical regions of eastern Asia. Here, we report the presence of hybrid and/or introgressed liver flukes in Vietnam where it has recently been recognised that human fascioliasis is an important zoonotic disease.

Molecular confirmation that Fasciola gigantica can undertake aberrant migrations in human hosts.

Two cases of aberrant migration by the liver fluke Fasciola gigantica in humans are reported. In both cases, subadult worms emerged through the skin. The identity of the worms was confirmed from their DNA sequences.