Detection of Trematodes from the Host Exotic Aquatic Snail Melanoides tuberculata in an Urban Stormwater System

The red-rimmed melania or Malaysian Trumpet Snail, Melanoides tuberculata, is a common exotic freshwater snail that has been invading an increasing number of water bodies in North America. As well-known host for trematodes causing human and animal diseases, the pattern invasion parasitic infection this species great concern. Snail specimens were collected from urban stream Los Angeles drains into fragile, protected wetland ecosystem. Molecular analysis identified four trematode species: Haplorchis pumilio, Fasciola jacksoni, Parorchis sp. TH-2019, unclassified species, Trematoda distomecercaria WN-2016. H. pumilio responsible haplorchiasis infections, previously considered endemic to Asia. F. jacksoni significant cause mortality Asian elephants. This study represents first occurrence America novel association with M. tuberculata. also new occurrences TH-2019 WN-2016, within California only documented marine whelk. identification these tuberculata further exemplifies need ongoing monitoring detection, especially considering significance public health.