PRELIM LAB : PHYSICAL EXAMINATION OF STOOL Flashcards
________ are usually found in FULLY FORMED specimens.
CYSTS
_______may be found in either liquid or formed stools, but as the liquid stool is usually very dilute, they may often be difficult to detect in such specimens.
HELMINTH EGGS
________are usually found in liquid or soft stools, but almost never in fully formed ones.
TROPHOZOITES
Freshly passed specimens are essential for the detection of trophic amoebae or flagellates. Therefore, all liquid or soft stools must be examined within ______hour of the time of passage or preserved in an appropriate manner.
1/2 (30 minutes)
Fecal specimens should never be incubated at 37°C; this will promote disintegration of trophozoites and cysts
and maturation and hatching of hookworm eggs.
T OR F?
TRUE
Gross Stool examination includes:
Color
Quantity
Consistency
Odor
Mucous
frequently reported
Consistency & color
The chemical responsible for the normal brown color of the human excreta is the ____________from stercobilinogen.
STERCOBILIN
COLOR:
normal color due to oxidation of bile pigments
BROWN, DARK BROWN OR YELLOW-BROWN
COLOR:
- ingestion of chocolate or cocoa
- Steatorrhea
GRAY COLOR
COLOR:
- iron or bismuth ingestion
- bleeding from the upper GI tract
- black tarry stool (MELENA)
BLACK
COLOR:
- diet high on meat
VERY DARK BROWN
COLOR:
- diet high in beats, laxatives of vegetable origin
- bleeding from the lower GI tract (recent)
RED COLOR
COLOR:
- diet high on spinach, green vegetables
- possible Pseudomonas infection
GREEN or YELLOW-GREEN
COLOR:
- may indicate breakdown of hemoglobin
RUST COLOR
