The indigenous North American mammalian schistosome Heterobilharzia americana has recently attracted attention for causing outbreaks in dogs in states outside of its southeastern U.S. distribution. Although H. americana has yet to be reported in New Mexico, we examined 2 New Mexico isolates of Galba snails to determine their susceptibility to experimental infection with an isolate of H. americana from Utah. One of the Galba isolates from the Rio Grande bosque in the Albuquerque suburb of Corrales was identified as Galba humilis, and like specimens of the same taxon from Utah, proved susceptible to H. americana (27.6% of exposed surviving snails positive). The second Galba isolate sourced from the northern mountains of New Mexico, which surprisingly was revealed to be Galba schirazensis based on cytochrome c oxidase 1, 16S rRNA, and the internal transcribed spacer 2 markers, was also susceptible to H. americana (56.3% of exposed surviving field-derived snails and 46.4% first generation [F1] snails positive). This is the first report of the latter snail being a compatible snail host for H. americana. As G. schirazensis has a wide, albeit spotty, distribution and is considered an invasive species, it provides yet another opportunity for H. americana to expand its known range, potentially including the state of New Mexico as well.

北美本土哺乳动物血吸虫美洲异毕吸虫最近因其在美国东南部分布地区以外的州引起狗的疫情而引起关注。尽管新墨西哥州尚未有美洲美洲蜗牛的报道，但我们检查了 2 个新墨西哥州分离的加尔巴蜗牛，以确定它们对来自犹他州的美洲美洲蜗牛的实验性感染的易感性。阿尔伯克基郊区科拉莱斯的里奥格兰德森林中的一种Galba分离物被鉴定为Galba humilis，与来自犹他州的同一分类单元的标本一样，被证明对H. americana敏感（暴露的幸存蜗牛中 27.6% 呈阳性）。第二个来自新墨西哥州北部山区的Galba分离株，基于细胞色素c氧化酶 1、16S rRNA 和内部转录间隔区 2 标记，令人惊讶地被发现是Galba schirazensis ，它也对美洲人血球菌敏感（56.3% 的美洲人血球菌）。暴露的幸存田间蜗牛和 46.4% 的第一代 [F1] 蜗牛呈阳性）。这是关于后一种蜗牛是美洲蜗牛的兼容蜗牛宿主的首次报道。由于G. schirazensis 的分布范围虽然参差不齐，但分布广泛，并且被认为是一种入侵物种，因此它为美洲人提供了另一个扩大其已知范围的机会，可能也包括新墨西哥州。