trematodes ectoaprasite Flashcards
causes liver and spleen enlargement; egg w lateral spine
S. mansoni
snails are the host
schistosma
cercariae penetrate skin of humans
schistosoma
fibrosis, inflammation, portal HTN
schistoma
S. haematobium leads to SCC of the
bladder (apinelss hematuria) and
S. haemotobium can lead to pulmonary htn
true
urinary schistomosiasis
S. haematobium
location of s haemotibum
n. africa, sub sahharn africa, middle east
in schistoma, the larva penetrate intact human skin and then travel to
liver
S. mansoni is found where
Asia
intestinal schistomosias (GI illness) or hepatic schistomoiasis (portal HTn, cirrhosis
s. mansoni:
undercooked fish are the transmission of this trematode
clonorchi sinensis
clonorchis sinensis what cancer
cholangiocarcinoma
biliiary tract inflammation : cause pigmented gallstones
clonorchis sinensis
what type of immune response against schistosma
th2 mediated grnaulomatous repsone against eggs.
what does thte th2 mediated repsonse to schistoma eggs lead to
marked fibrosis and ulceration and scarring of bowel or bladder/ureters; eggs that settle into presinusoidal radicals of portal vein can cause periportal pipestem fibrosis
Ectoparasites include
sarcoptes scabei and peidculus humanus/phtirus pubis
pruritus (worse at night) and serpingious burrows (lines) in webspace of hands and feet
scabies
can involve elbows, axillary folds, nipples, areola in women; scortum + penis in men
mites burrow into which layer of skin
stratum corenum
sarcoptes scabei is common in
children, crowded populations (jails, nursing homes);
transmission through skin to skin contanct (most common or via formites
blood sucking lice that caues intense pruritus w associated excoriations, commonly on scalp and head or waistband and axilla
pediculus humanus/phthrius pubis
can transmit rickettsia prowazekii , borrelia recurrentis, bartonella quintana
pediculus humanus/phthirus pubis
trench fever is caused by
bartonella quintana
