Opisthorchiidae Flashcards
-small to medium sized flukes parasitic in the gallbladder and bile ducts of reptiles, birds & mammals
Family Opisthorchiidae
Important spp
Parasites of fish eating mammals
-Bodies are flattened and translucent; suckers are weak & not far apart
-Pharynx & esophagus present & intestinal caeca reaching the posterior extremity
-Testes at posterior part of the body & arranged diagonally
-Ovary anterior to the testes
Family Opisthorchiidae
Species
Opisthorchis tenuicollis
O. viverrini
Chlonorchis sinensis
Metorchis albidus
Metorchis conjunctus
Natural DH
Opisthorchis tenuicollis
O. viverrini
Chlonorchis sinensis
Metorchis albidus
Metorchis conjunctus
-Dog, cat, fox, pig
-Civet, domestic & wild cats, dog, man
-Man, dog, cat, pig, weasel, mink, badger
-Dog, cat, fox, grey seal
-Cat, dog, fox, mink, racoon
Habitat
Opisthorchis tenuicollis
O. viverrini
Chlonorchis sinensis
Metorchis albidus
Metorchis conjunctus
-Bile ducts
-Bile ducts
-Bile ducts
-Gall bladder, bile ducts
-Bile ducts
Snail IH
Opisthorchis tenuicollis
O. viverrini
Chlonorchis sinensis
Metorchis albidus
Metorchis conjunctus
-Bithynia leachi, B. infata
-B. goniomphalus, B. funniculata
-Parafossalurus manchuricus, Bulinus, Bithynia, Melania, Vivipara
-Amnicola limosa, Bithynia teutaculata
-Amnicola limosa
2nd IH
Opisthorchis tenuicollis
O. viverrini
Chlonorchis sinensis
Metorchis albidus
Metorchis conjunctus
-Crypnid fish
-Crypnid fish
-Crypnid fish
-Crypnid fish
-Castostomus commersoni (commin sucker)
Pathology of Clonorchis sinensis
-dilatation of bile duct adenomatous thickening
-catarrhal cholecystitis
-desquamation of bile duct epithelium
-periductal fibrosis w/ bile stasis & jaundice
-cholangiocarcinoma
Clinical signs of C. sinensis infection (man)
-diarrhea
-abdominal pain
-icterus
-ascites
Treatment and prophylaxis of C. sinensis
-niclofolan
-Praziquantel (30mg/kg PO once daily)
-thorough cooking or freezing of fish
-Control of snail IH
-proper disposal of human excreta
Formosan gem-faced civet
