TREMATODES Flashcards
Fasciolopsis buski Common name
Largest Intestinal Fluke
Heterophyes heterophyes Common name
Dwarf Intestinal Fluke, Von Seibold fluke
Fasciolopsis buski Ova
Appears as “Hen’s egg”
Heterophyes heterophyes Ova
Contains fully developed miracidium
Fasciolopsis buski Adult
Thick, flesh in color
Heterophyes heterophyes Adult
Cuticle is covered with minute scale-like spines
Fasciolopsis buski Habitat
S.I., L.I., and Stomach
Heterophyes heterophyes Habitat
Heterophyes heterophyes Infective stage
S.I.
metacercaria
Fasciolopsis buski 1St IH
Planorbid snails
Heterophyes heterophyes 1St IH
Blackish water snails
Fasciolopsis buski 2nd IH
Water plant: west chestnuts, water caltrop, water hyacinth, water bamboo
Heterophyes heterophyes 2nd IH
Fish: Mugil or Mullet, yellow perch
Fasciolopsis buski Laboratory diagnosis
Fecalysis, vomitus examination
Heterophyes heterophyes Laboratory diagnosis
Identification of eggs in stool
LUNG /PULMONARY FLUKE
- Paragonimus westermani
HEPATIC/ LIVER FLUKES
Clonorchis sinensis
Opistrochis felineus
Dicrocoelium dendriticum
Lung fluke
Paragonimus westermani
Oriental Lung Fluke
Paragonimus westermanii
Japan, Korea, China, Nepal, Philippines
Paragonimus westermani
Ova: operculated (flattened operculum)
Paragonimus westermani
Ova: ovoidal (80-120um)
Paragonimus westermani
Ova: yellowish-brown to dark or golden brown
Paragonimus westermani
Ova: immature - when laid in germ cell
Paragonimus westermani
Adult: reddish brown
Paragonimus westermani
active stage: spoon-shaped
Paragonimus westermani
preserved stage: coffee bean-shaped
Paragonimus westermani
Male - irregular lobed testes are oblique
Paragonimus westermani
Female - ovary is lobed
Paragonimus westermani
Vitellaria - located at the extreme lateral fields
Paragonimus westermani
Habitat: lung pockets
Paragonimus westermani
Infective stage: metacercaria
Paragonimus westermani
Diagnostic stage: eggs
Paragonimus westermani
1st IH: snail of genus Hua, Brotia asperata (Philippines)
Paragonimus westermani
2nd IH: freshwater crabs, Crayfish (genus Astracus, and Cambarus)
Paragonimus westermani
Disease/s: Paragoniamiasis/Pulmonary disturbances
Paragonimus westermani
Laboratory diagnosis: Eggs in sputum and feces, X-ray, Ab detection
Paragonimus westermani
Chinese Liver Fluke
Clonorchis sinensis
Oriental Liver Fluke
Clonorchis sinensis
Cat Liver Fluke
Opistorchis felineus
Lancet Fluke
Dicrocoelium dendriticum
Lanceolate Fluke
Dicrocoelium dendriticum
Distinct convex operculum
Clonorchis sinensis
Opistorchis felineus
Resembles “old fashion” electric bulb
Clonorchis sinensis
Opistorchis felineus
Ellipsoidal, brown to dark brown
Dicrocoelium dendriticum
Thick shelled with distinct operculum
Dicrocoelium dendriticum
Flat, transparent, elongated, rounded posteriorly, and attenuated anteriorly
Clonorchis sinensis
Opistorchis felineus
Slender, lancet shape, flat
Dicrocoelium dendriticum
Bile passages/bile ducts of fish-eating mammals