The Diversity of Cercariae from Freshwater Snails in Lowland Areas of Binh Dinh and Phu Yen Provinces, Vietnam

Trematodes obtained from snails in giant gourami ponds supplied by well water in Tien Giang province, Vietnam

“…Three snail species were abundant in the giant gourami ponds including Sermyla tornatella, Filopaludina sumatrensis and Sinotaia lithophaga with no Trematodes obtained from snails in giant gourami ponds supplied by well water in Tien Giang province, Vietnam Israeli Journal of Aquaculture -Bamidgeh cercariae. This finding agreed with the research result by Nguyen et al 6 that Filopaludina sumatrensis and Sinotaia lithophaga had cercariae free.…”

“…This research confirmed again that Melanoides tuberculate and Bithynia snails were easier to infect cercariae than the other sampled snails. This finding was similar to the previous research that Melanoides tuberculate, and Bithynia fuchsiana was infected with a high prevalence in ponds and canals 5,6 in natural water bodies 10 and in Chao-Phraya Basin in Thailand. 25 Three morphotypes of cercariae were recovered from Melanoides tuberculata and Bithynia siamensis, two from Melanoides tuberculata (Xiphidio cercariae and Furcocercous cercariae), and two from Bithynia siamensis (xiphidio cercariae and pleurolophocercous cercariae).…”

“…These findings were different from the research result in VAC ponds by Bui et al, 5 that pleurolophocercous cercariae were the most common type of cercariae recovered, followed by echinostome cercariae and then xiphidiocercariae. Moreover, the critical finding in this research was that snails were infected with cercariae, so fish species of giant gourami cultured in ponds in the same research area were found infected metacercariae as the report by Pham et al 3 When comparing to the other research on snails in natural water bodies by Nguyen et al, 6 Nguyen et al, 10 and Anucherngchai et al, 25 morphotypes of cercariae in snails from the wild water were much higher than in the pond culture of giant gourami. It can be explained that the natural water bodies were open, giving various types of cercariae more chances to get into snails.…”

“…Species of the Bithyniidae, Stenothyridae and Planorbidae dominated in rice fields and small canals, and species of the families Thiaridae and Viviparidae were common in VAC ponds. In An My and An Hoa communes, Tuy An district, Phu Yen province in the Central of Vietnam, Nguyen et al 6 found 11 snail species including Melanoides tuberculata, Sermyla tornatella, Tarebia grannifera, Filopaludia sumatensis, Pomacea sp., Sinotaia lithophaga, Gyraulus sp., Lymnaea sp., Bithynia sp., Indoplanrbis exustus and Thiara scabra. Ha et al 7 found 14 freshwater snails including Lymnaea swinhoei, Lymnaea viridis, Indoplanorbis exustus, Clea sp., Bithynia siamensis, Mekongia sp., Eyriesia sp., Adamietta sp., Melanoides tuberculata, Sermyla sp., Tarebia granifera, Pomacea canaliculata, Trochotaia sp., and Filopaludina martensi.…”

“…Besprozvannykh et al 19 found the occurrence of 12 cercariae species in 8 families including Cyathocotylidae, Pleurogenidae, Lecithodendriidae, Notocotylidae, Heterophyidae, Paramphistomidae, Psilostomidae and Echinostomatidae. Nguyen et al 6 Giant gourami is a popular fish species cultured in ponds in Tien Giang province of Vietnam and found infected metacercariae. 3 However, there is no information about the presence of snails and trematode infections in these.…”