Trematodes: Difference between revisions

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! colspan="4" |Liver flukes
 
! colspan="4" |Liver flukes
 
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|[[Clonorchis sinensis]]
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|[[Clonorchis sinensis]] (Chinese liver fluke)
 
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|
 
|fish
 
|fish
 
|China, South Korea, Japan, Vietnam, and eastern Russia; common
 
|China, South Korea, Japan, Vietnam, and eastern Russia; common
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|-
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|[[Dicrocoelium dendriticum]] (lancet liver fluke)
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|
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|
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|-
 
|-
 
|[[Fasciola gigantica]]
 
|[[Fasciola gigantica]]
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|Africa, Hawaii, western Pacific, Southeast Asia
 
|Africa, Hawaii, western Pacific, Southeast Asia
 
|-
 
|-
|[[Fasciola hepatica]]
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|[[Fasciola hepatica]] (sheep liver fluke)
 
|[[Lymnaea species]]
 
|[[Lymnaea species]]
 
|underwater vegetation, especially watercress
 
|underwater vegetation, especially watercress
 
|Bolivia and Peru, but also Europe, South America, and Middle East, near sheep rearing areas
 
|Bolivia and Peru, but also Europe, South America, and Middle East, near sheep rearing areas
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|-
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|[[Metorchis conjunctus]] (Canadian liver fluke)
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|
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|-
 
|-
 
|[[Opisthorchis felineus]]
 
|[[Opisthorchis felineus]]
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|Western Europe and Siberia
 
|Western Europe and Siberia
 
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|[[Opisthorchis viverrini]]
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|[[Opisthorchis viverrini]] (Southeast Asian liver fluke)
 
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|freshwater fish
 
|freshwater fish

Revision as of 20:51, 11 August 2020

Background

Microbiology

  • Trematodes (flukes) are platyhelminths
  • All have an intermediate snail host, and most have a second intermediate host before reaching humans via ingestion of the intermediate
Organism First intermediate Second intermediate Distribution
Blood flukes
Schistosoma haematobium Bulinus species none; penetrates skin Africa and the Middle East
Schistosoma intercalatum Bulinus species Central and West Africa
Schistosoma japonicum Oncomelania species Asia
Schistosoma mansoni Biomphalaria species Africa, the Middle East, and South America
Schistosoma mekongi Neotricula species Southeast Asia
Intestinal flukes
Echinostoma ilocanum snails and fish Middle and Far East
Fasciolopsis buski water vegetables, especially watercress, bamboo, and water chestnuts China, Thailand, India, Bangladesh, with pig reservoir
Heterphyes heterophyes fresh-/brackish-water fish Middle and Far East
Metagonimus yokogawai fish Middle and Far East
Liver flukes
Clonorchis sinensis (Chinese liver fluke) fish China, South Korea, Japan, Vietnam, and eastern Russia; common
Dicrocoelium dendriticum (lancet liver fluke)
Fasciola gigantica underwater vegetation Africa, Hawaii, western Pacific, Southeast Asia
Fasciola hepatica (sheep liver fluke) Lymnaea species underwater vegetation, especially watercress Bolivia and Peru, but also Europe, South America, and Middle East, near sheep rearing areas
Metorchis conjunctus (Canadian liver fluke)
Opisthorchis felineus Western Europe and Siberia
Opisthorchis viverrini (Southeast Asian liver fluke) freshwater fish Southeast Asia
Lung flukes
Paragonimus westermani Semisulcospira species seafood, especially crayfish or crab China, Japan, Korea, the Philippines, and Thailand