Trematodes Flashcards
The first intermediate host of Trematodes
Snails
Trematodes have complete or incomplete digestive system
Incomplete
Common name of Clonorchis sinensis
Chinese or oriental liver fluke
Mature Trematodes eggs.
Embryonated with miracidium
Schistosome Chlonorchis Opistorchis Heterophyes Metagonimus
Seen only in Heterophyes Heterophyes
Gonotyl
Genital sucker
Immature, unembryonated without miracidium eggs
Paragonimus
Fasciola
Fasciolopsis
Echinostoma
Common name of Fasciola gigantica
Tropical r giant liver fluke
Infective stage of all Trematodes
Metacercaria
Common name of Fasciola hepatica
Sheep or temperature liver fluke
Common name of Opistorchis felineus
Cat liver fluke
2nd intermediate host of Fasciola spp
Ipomea obscura
Liver flukes
Fasciola hepatica and gigantica
Opistorchis felineus and viverini
Clonorchid sinendis
Deeply branched testes in tandem
Clonorchis sinensis
Swallow lobed testes
Opistorchis felineus
Presence of collar of spines
Circumoral spine
Echinostoma ilocanum
Common name of Fasciolopsis buski
Giant intestinal fluke
Lung fluke
Paragonimus westermanii
Intestinal fluke
Fasciolopsis buski
Echinostoma ilocanum
Heterophyed group
Habitat of Fasciolopsis buski
Small intestine
Common name of Echinostoma ilocanum
Garrison fluke
Egg stained with potassium permanganate shows distinct melon like ridges on the surface of
Opistorchis viverini
Dumbbell shaped testes
Echinostoma ilocanum
Heterophyid group
Heterophyes heterophyes
Metagonimus yokogawai
Haplorchis talchui
Haplorchis yokogawai
Deeply lobed testes
Opistorchis viverini
Common name of Paragonimus westermanii
Oriental lung fluke
Resembles a coffee bean
Paragonimus westermanii
Schistosoma are diecious or monoecious
Diecious
MOT of Schistosomes
Skin penetration
Infective stage of Schistosomes
Cercaria
How many intermediate host are present in Schistosomes
1
Flat and leaf like
Trematodes
Blood flukes
Schistosoma japonicum, mansoni, haematobium
Mistaken as broad fish tapeworm
Paragonimus westermanii
1st intermediate host of Fasciola spp.
Lymhaea philippinensis
2nd intermediate host of Clonorchis spp, and Opistorchis spp
Family Cyprinidae
2nd IH of Fasciolopsis buski
Nymphaea lotus
1st IH of Fasciolopsis buski
Segmentina
2nd IH of Echinostoma ilocanum
Pila luzonica-kuhol
Vivipara angularis-susong pampang
Smallest yet deadliest Trematodes
Heterophyes Heterophyes
2nd IH of Heterophyes group
Chanos chanos-bangus
1st IH of Paragonimus westermanii
Antemelania asperata
2nd IH of Paragonimus westermanii
Sunclathelpusa phillipina
Smallest blood fluke
Schistosoma japonicum
Causes katayama fever
Schistosoma haematobium
1st IH of S. japonicum
Oncomelania hupensis quadrasi