Sketchy Micro: Trematodes Flashcards
Who is at risk for Schistosoma infection?
Swimmers (like the swimmer in the aquarium)
Describe the Schistosoma life cycle.
They mature in the liver and get pooped. Snails are intermediate hosts (like the snails stuck to the aquarium wall).
How do mature Schistosoma get to the GI tract from the liver?
They travel against the flow in the portal vein.
Think of the two red fish going opposite the school of blue fish in the porthole.
S. mansoni and S. japonicum reside in ________________.
the mesenteric veins (like the fish in front of the merMAN and the JAPaNese tourists looking in through the porthole)
Describe the protrusions of S. mansoni and S. japonicum.
S. mansoni has a long, lateral spine (like the long fish in front of the merman statue with the protruding fin) and S. japonicum has a tiny spine (“it’s almost perfectly round, like the Japanese flag”).
S. mansoni and S. japonicum cause what acute and chronic symptoms?
- Acute: itching at the site of infection (“swimmer’s itch”)
- Chronic: portal hypertension (like the porthole glass cracking under the pressure and the yellow coat –symbolizing jaundice –on the tourist)
Describe the shape of S. haemotobium.
It has a long, terminal spine (like the swordfish stabbing the bladder-shaped jellyfish).
What drug treats Schistosoma?
Praziquantel (like the pretzel in the tank that the swimmer dove in after)
What is the scientific name for Chinese liver fluke?
Clonorchis sinensis (orca whale)
Clonorchis sinensis causes what chronic complications?
- Biliary fibrosis which can progress to cholangiocarcinoma (like the seagull with the fibrous rope attached to the crab)
- Pigmented gallstones (like the stack of dark stones that the other seagull is standing on)
How can you diagnose C. sinensis?
There will be operculated eggs on stool O&P.
Think of the eggs with the yarmulke-like hats.
What is the treatment for C. sinensis?
Praziquantel (like the pretzel being eaten by the seagull in the corner)
Paragonimus westermani can cause ________________.
chronic cough with bloody sputum (like the PenGuins with red spots on their chests)
How is P. westermani transmitted?
Snails are the intermediate host (like the snails on the glass), but humans usually get it from eating inadequately cooked crab (like the penguins eating crab legs).
How can P. westermani be diagnosed?
Like Clonorchis sinensis, P. westermani will present with operculated eggs on stool O&P (like the yamulke eggs next to the penguins).
