blood testing is specific for human “globin” & fewer false positives from interfering factors (ie. red meat or drug ingestion) no prep, less # of spec. needed (eg. Hemoccult-ICT)

Immunochemical fecal occult blood (iFOBT)

requirement for hemoccult accuracy

Hemoccult requires 3 serial stools: avoid red meats & >250mg vitamin C x 3 days Avoid NSAIDs or *Aspirin (>325mg) x 7 days prior to & during specimen collection. Iodine preps should be out of system

with a fast, acute process. You may not see WBCs in deep tissue or if problem is localized. Negative WBC does not mean that you don't have an inflammatory diarrhea

Presence of Fecal leukocytes

Shigella, Campylo, EIEC, entero, Invasive, E.coli

Variable Fecal Leukocytes

salmonella, yersinia, vibrio, p

is a toxin assay, not a stool culture. One positive means they have it, but if it is negative, you may need to send serial specimens. C diff is an anaerobe.

A stool guaic is positive in a 79 yo pt receiving tx for severe OA. Which of the following meds is most likely responsible if this is a "false" positive result?

Naproxen 500mg BID (not acetominophen 500mg BID, Aspirin 81 mg QD)

The enterotoxin associated with C. diff diarrhea that is most common

Toxin A (may need to request toxin B if A comes back negative)

The three most common bacterial pathogens tested on a routine stool culture are

salonella, shigella, campylobacter

what is not an idication for parasitic testing

bloody diarrhea for 2 days (indicated: travel to endemic area and subsequent diarrhea, HIV pt with diarrhea, Persistent diarrhea >10days)

What months of the year do you get Vibrio

The months that lack an R. May, June, July, August

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DM Stool Studies

Stool Studies

Question	Answer
blue indicates	heme found in stool
blood testing is specific for human “globin” & fewer false positives from interfering factors (ie. red meat or drug ingestion) no prep, less # of spec. needed (eg. Hemoccult-ICT)	Immunochemical fecal occult blood (iFOBT)
requirement for hemoccult accuracy	Hemoccult requires 3 serial stools: avoid red meats & >250mg vitamin C x 3 days Avoid NSAIDs or *Aspirin (>325mg) x 7 days prior to & during specimen collection. Iodine preps should be out of system
green results may be due to	bile
WBCs are associated	with a fast, acute process. You may not see WBCs in deep tissue or if problem is localized. Negative WBC does not mean that you don't have an inflammatory diarrhea
___ of stool is bacteria	98%. NEVER GRAM STAIN
Presence of Fecal leukocytes	Shigella, Campylo, EIEC, entero, Invasive, E.coli
Variable Fecal Leukocytes	salmonella, yersinia, vibrio, p
abset	come back to
non	com back to
C. difficile test	is a toxin assay, not a stool culture. One positive means they have it, but if it is negative, you may need to send serial specimens. C diff is an anaerobe.
HIV patient with watery, heme pos diarrhea. Stool cultures are reported as no growth and fecal leukocytes are absent. The most likely etiology of infection is:	CMV
A stool guaic is positive in a 79 yo pt receiving tx for severe OA. Which of the following meds is most likely responsible if this is a "false" positive result?	Naproxen 500mg BID (not acetominophen 500mg BID, Aspirin 81 mg QD)
Fecal leukocytes is indicative of	inflammatory diarrhea
fecal leukocytes are not generally found in entamoeba histolytical	surface toxins rupture WBCs
A nursing home pt is treated with cephalosporin for pneumonia. One week later, pt develops green, watery diarrhea with fever.	C. Difficile
The enterotoxin associated with C. diff diarrhea that is most common	Toxin A (may need to request toxin B if A comes back negative)
The three most common bacterial pathogens tested on a routine stool culture are	salonella, shigella, campylobacter
what is not an idication for parasitic testing	bloody diarrhea for 2 days (indicated: travel to endemic area and subsequent diarrhea, HIV pt with diarrhea, Persistent diarrhea >10days)
two most common parasite infections	crypto and cyclospora
The most sensitive diagnostic test for detecting Giardia	IFA
two parasites seen with acid-fast stain	cryptosporidium and cyclospora
What bacterial pathogen is limited to humans and primates as hosts and transmitted via fecal-oral transmission	Shigella
What months of the year do you get Vibrio	The months that lack an R. May, June, July, August
Peanut butter has been pulled for	Salmonella
small curved gram negative rods resembling "flock of seagulls"	Campylobacter

Created by: ltm12

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