Lab Flashcards
1
Q
Stool culture
A
Determine causative organism of diarrhea
2
Q
Quantitative fecal fat
A
- Fat malabsorption or maldigestion
- 3 day collection & analysis
- Bile acid, pancreatic or malabsorption disorders
3
Q
C. diff assay
A
- ELISA test- quick results
- Cytotoxicity assay is gold standard: detects toxic effects, expensive & 1-3 days
4
Q
Fungal culture
A
Determine causative org.
5
Q
Stool O & P
A
Parasitic infection- repaeat x2 occasion
6
Q
Hemoccult
A
In clinc or home- FIT or FOBT
- False negative with Vit C, red meat
7
Q
fecal leukocytes
A
- Stained to determine presence
- infectious or invasive orgs
8
Q
Fecal lactoferrin
A
Marker for neutrophils
- assessment for IBD
- indicates inflammatory colitis or enterocolitis
9
Q
Urea breath test
A
H. pylori- most consistently accurate
- Detection of labeled CO2
10
Q
Gastrin
A
Increased: Neuroendocrine & gastic tumors, zollinger-ellison, chronic H. pylori
- Decreased: pernicious anemia
11
Q
SAAG gradient
A
- Classify ascites into portal/ non-portal HTN
- Ascitic fluid albumin
12
Q
H. pylori ab serology
A
- Non- invasive, detects exposure via IgG
- Cant discriminate between past or current
- Cant monitor response to tx
13
Q
IgA endomysial Ab test
A
- Celiac disease
- binds to CT and immunofloresces
- falls with reduction in gluten
14
Q
IgA tTG ab test
A
- Antibody test in celiac
- Less expensive
