Week 4 - Wed - Fri Flashcards
(57 cards)
In which - UC or CD - do you get pseudopolyps
what are they
in UC
they are actually just left over segments of gut epithelial cells that are not ulcerated
crypt architectural distortion means what - acute or chronic IBD
chronic
antibody tests that can differentiate UC from CD
CD: ASCA positive
UC: pANCA positive
quiescent colitis
damaged crypt architecture without inflammation
patients with chronic watery diarrhea and a normal colonoscopic exam
microscopic colitits
if nothing on biopsy then irritable bowel syndrome
what are you thinking if you see intraepithelial lymphocytes
what other cells are you looking for
microscopic colitis - lymphocytic colitis type
also see increased plasma cells
what are you thinking if you see eosinophilic tissue right under the epithelium on colon biopsy
microscopic colitis - collagenous colitis type
it’s a collagen band
colonic cells with enlarged nuclei and with normal cytoplasm
radiation colitis
if there was less cytoplasm, higher chance of it being cancer
intestinal segments that are particularly susceptible to ischemic damage
splenic flexure (SMA and IMA watershed zone)
sigmoid colon and rectum (IMA, pudendal artery, and iliac arter watershed zone)
smudgy hyalinized appearance to LP and atrophic crypts
ischemic colitis
hematochezia in an older patient with tortuous dilation of vessels
what is it
where in the GI system
angiodysplasia
most often found in cecum, terminal ileum, and ascending colon
smooth muscle proliferation between the crypts
characteristic of a “solitary rectal ulcer”
the majority of foodborne illness outbreaks are caused by what
norovirus
gram positive rod that can produce biofilms and spores, and adheres to invasive medical devices
found in rice and can survive cooking
bacillus cereus
B. Cereus = Box Car appearance
gram pos bacilus non-fastiduous flagellated, motile non spore forming oxidase -
Listeria Monocytogenes
gram neg curved rod faculative anaerobe flagellated, motile oxidase pos
Vibrio spp
inc vibrio cholera
also grows in alkaline media (she didn’t mention it, but its in FA)
gram pos bacili spore-forming obligate anaerobe non-motile
clostridium perfringens
which bacteria produces an enterotoxin that binds to receptors in endothelial cell junctions and generates pores in the host mucosa cells
clostridium (perfringens, botulinum, difficile)
it’s called alpha toxin (lecithinase)
bacteria she wanted us to remember assc with cafeterias and will not normally cause fever or vom
c. perfringens
gram - bacili (spiral) microaerophilic motile cold sensitive
in what aninals?
what agar?
what possible complication
campylobacter jejuni
poultry
karmali agar - charcoal based
guillain-barre
karmali agar
used to culture campylobacter jejuni
has vanco for the gram positives, cefoperazone, and cyclohexamide
guillan-barre linked to what bacteria
campylobacter jejuni
what bacteria can generate H2S and cause an iron sulfide precipitate
salmonella enterica
salmonella found it what pets
turtles
i like turtles
