Erawan Waterfall, located in Erawan National
Park, Kanchanaburi Province, is not only
a beautiful tourist destination but also the
source Kwai Yai River, an important river for
the residents and communities living on the
western part of Thailand. A study of parasitic
infections of freshwater snails in this water
source directly benefits the local residents and
the country as a whole. Most freshwater snails
can become intermediate hosts for trematode
cercariae which can grow and may be transmitted
to people and animals. Since trematode
cercariae found in snails have shapes