Foodborne zoonotic trematode (FZT) infections are common neglected tropical diseases in Southeast Asia. Their complicated life cycles involve freshwater snails as intermediate hosts. A cross-sectional study was conducted in Yen Bai and Thanh Hoa provinces in North and Central Vietnam, to investigate the diversity of cercariae of potential FZT and to construct the phylogenetic relationship of trematode cercariae based on the Internal Transcribed Spacer 2 (ITS2) region. Among 17 snail species collected from various habitats, 13 were infected by 10 cercarial groups among which parapleurolophocercous, pleurolophocercous, and echinostome cercariae were of zoonotic importance. The monophyletic tree separated cercarial sequences into different groups following the description of the cercariae families in which Haplorchidae, Opisthorchiidae, Echinochasmidae, and Echinostomatidae are important families of FZT. The overall prevalence was different among snail species and habitats and showed a seasonal trend. Parapleurolophocercous and echinostome cercariae emerged as the most common cercariae in snails in Yen Bai, while monostome, echinostome, and megalura cercariae were most common in Thanh Hoa. Using a molecular approach, we identified Parafossarulus striatulus as the first intermediate snail host of Clonorchis sinensis in Thac Ba Lake. Melanoides tuberculata and Bithynia fuchsiana were we identified preferred intermediate snail hosts of a diverse range of trematode species including intestinal flukes (i.e., Haplorchis pumilio and Echinochasmus japonicus) in Yen Bai and Thanh Hoa, respectively.

食源性人畜共患病性吸虫（FZT）感染是东南亚常见的被忽视的热带病。它们的复杂生命周期涉及淡水蜗牛作为中间宿主。在越南北部和中部的延拜省和清化省进行了横断面研究，以研究潜在的FZT尾c的多样性，并基于内部转录间隔区2（ITS2）区域构建尾的系统发育关系。在从不同栖息地收集的17种蜗牛中，有13种感染了10个尾car类，其中胸膜副上皮，胸膜下and和棘皮e虫具有人畜共患病重要性。一元树按照尾c科的描述将尾car序列分为不同的组，其中H科，Op科，棘皮纲和棘皮纲是FZT的重要家族。蜗牛种类和栖息地的总体流行率有所不同，并呈季节趋势。在炎白螺中，百日咳副鞭毛虫和棘突棘尾chin是蜗牛中最常见的尾c，而在清化市，单吻ome，棘突棘突器和me头尾是最常见的。使用分子方法，我们确定了斜纹细线虫是Thac Ba湖中中华支睾吸虫的第一个中间蜗牛宿主。Melanoides tuberculata和圆沼螺被我们鉴定优选的一个不同的范围吸虫物种的肠包括吸虫（即，中间蜗牛主机钩棘单睾pumilio和棘刺参分别）在安沛和清化。