Walden2 Flashcards
Schistosomiasis
Distribution
S. Mansoni: PUERTO RICO! Also Africa, Arabian peninsula, venezuela, Brazil
S. Japonicum: japan
Schistosomiasis
Freshwater avian (bird) schistosomes
Distribution
Great Lakes
Schistosomiasis
Freshwater avian schistosomes
Sx
Swimmer’s itch
Transient rash
Schistosomiasis
Salt water avian schistosomes
Distribution and sx
Cape cod (New England)
Clam digger’s itch
Schistosomiasis
Cause of infection
Penetration of skin by free swimming larva (cercariae) (dams, irrigation)
Schistosomiasis
Life cycle
Man-snail-man
Mansoni: free swimming cercariae
Migrates to lungs and liver
Schistosomiasis
On hatching
Miracidium (larva) search out snail and form cercariae
Schistosomiasis
Pathology
Live in mesenteric veins: 30 yrs
Eggs produce granulomata and scars
Schistosomiasis
Egg deposition
Mansoni: mesenteric vessels
Haematobium: bladder
Schistosomiasis
Sx
Mansoni and japonicum cause intestinal and hepatic damage (portal hypertension, fibrosis, salmonella infxns)
Haematobium: hematuria, pain, bladder cancer
Schistosomiasis
Diagnosis
Eggs (prominent lateral spine or hook)
Schistosomiasis
Tx
Praziquantel
Taeniasis (tapeworm)
Host
Humans
Eggs or graves proglottids passed in feces. Cattle and pigs ingested vegetation with eggs
Taeniasis (tapeworm)
Route of infxn
Raw or undercooked infected meat
Attach to small intestine by scolex. Produce proglottids
Taeniasis (tapeworm)
Sx
Mild GI sx
Patient passes long sections of worm
Taeniasis (tapeworm)
Diagnosis
Microscopic examination of graves proglottids. Eggs.
Eggs of pork and beef tapeworms are indistinguishable
Taeniasis (tapeworm)
Tx
Praziquantel
Cysticercosis
Infective agent
Eggs of t. Solium
Cysticercosis
Route of infection
Eggs passed in feces, penetrate intestinal wall, migrate to mm and brain
Develop cysticerci (cysts)
Cysticercosis
Sx
Mental disturbances and SEIZURES
Cysticercosis
Diagnosis
Migrant worker from Mexico or guatamala, working on ranch in Texas or California, acts strangely with new seizures…
Antibody detection
CT, MRI
Cysticercosis
Tx
Albendazole, praziquantel
Diphyllobothriasis
(Fish tapeworm)
Location
Cold freshwater. Alaska, michigan, canada
Diphyllobothriasis
(Fish tapeworm)
Infection route
Diphyllobothriasis nihonkaiense from sushi and sashimi from sea
Diphyllobothriasis
(Fish tapeworm)
Life cycle
From raw or undercooked fish
Diphyllobothriasis
(Fish tapeworm)
Sx
B12 deficiency anemia
Diphyllobothriasis
(Fish tapeworm)
Diagnosis
Megaloblastic anemia
Diphyllobothriasis
(Fish tapeworm)
Tx
Praziquantel
