| genetic characterization and phylogenetic analysis of echinostomes. | we conducted this study to identify species and determine the phylogenetic relationships using ribosomal dna (rdna) sequences [partial sequences of 28s rdna and second internal transcribed spacer (it52)] of echinostomes collected from free-grazing ducks in phitsanulok province, thailand. four adult echinostomes were morphologically identified as echinostoma revolutum, 4 as hypoderaeulm conoideurn and 2 unidentified. sequences of other species/isolates of echinostomes retrieved from the genbank d ... | 2014 | 25417500 |