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Table 2 Relative abundance (% of all infections in snails) of cercariae morphotypes found in snails collected in small canals, rice fields and fish ponds in in two communes, Nhgia Lac and Nhgia Phu, in Nam Dinh province, northern Vietnam

From: The role of rice fields, fish ponds and water canals for transmission of fish-borne zoonotic trematodes in aquaculture ponds in Nam Dinh Province, Vietnam

Morphotypes of cercariae No. of infected snails Relative abundance (%) No. of infected snail species No. of sites where found
     Small canals (n = 30) Rice fields (n = 30) Ponds (n = 30)
Echinostome cercariae       
 Type 1 495 26.3 7 9 6 17
 Type 2 27 1.4 2 2 1 1
Pleurolophocercous cercariae       
 Type 1 360 19.2 4 8 4 17
 Type 2 379 20.2 4 9 5 16
 Type 3 19 1.1 1 1 1 2
 Type 4 18 1.0 4 3 2 2
Other       
 Amphistome cercariae 2 0.1 2 1 1 0
 Furcocercariae 6 0.3 3 0 2 2
 Gymnocephalous cercariae 34 1.8 3 1 0 4
 Monostome cercariae 69 3.7 3 3 0 9
 Opthalmoxiphidiocercariae 2 0.1 1 1 0 0
 Xiphidiocercariae 469 25.0 6 10 10 16