Exam 14: Fecal Analysis

State whether or not the following scenarios should be of concern to a laboratory supervisor and why: -An unusual number of positive occult blood tests are reported by a new employee in a satellite clinic.

A black,tarry looking stool is indicative of:

The D-xylose and lactose tolerance tests are abnormal in persons with malabsorption or maldigestion disorders.

All of the following are secreted into the small intestine by the pancreas except:

State whether each of the following scenarios relates to osmotic diarrhea,secretory diarrhea,or altered motility: -Staphylococcal food poisoning

State whether each of the following scenarios relates to osmotic diarrhea,secretory diarrhea,or altered motility: -Gastrectomy

Microscopic screening of a pale,frothy stool from a patient with prolonged diarrhea is performed for fecal neutrophils,fats,and meat fibers.The fecal neutrophil examination result is negative,increased large and small orange droplets are seen in the fat stains,and 10 unstriated muscle fibers are observed. -Based on the information provided,how long should the slide for muscle fibers be examined?

Microscopic screening of a pale,frothy stool from a patient with prolonged diarrhea is performed for fecal neutrophils,fats,and meat fibers.The fecal neutrophil examination result is negative,increased large and small orange droplets are seen in the fat stains,and 10 unstriated muscle fibers are observed. -Based on the information provided,absence of what substance most likely accounts for the increased orange droplets?

The normal brown color of the feces is produced by:

Crystals seen in a stool after it has been mixed with acetic acid,Sudan III stain,and heated may be composed of:

Diarrhea can result from all of the following except:

A stool pH of 5.0 correlates with a:

The most sensitive fecal enzyme test for the diagnosis of pancreatic insufficiency measures:

A stool that appears black and tarry may be associated with bismuth ingestion.

State whether each of the following scenarios relates to osmotic diarrhea,secretory diarrhea,or altered motility: -Lactose intolerance

To prevent false-positive fecal occult blood results,patients should be instructed to avoid eating all of the following for 3 days before testing except:

Tests for the detection of occult blood rely on which chemical reaction?

The coefficient of fat retention should be at least: