FECAL LEUKOCYTES

Question 1

Stool + Methylene blue
Methylene blue staining is the faster procedure but may be more difficult to interpret
Methylene blue is used to differentiate mononuclear cells and PMNs

Answer 1

WET PREPARATION

Question 2

A test for fecal WBC that gives a positive result in an invasive bacterial pathogen

Answer 2

LACTOFERRIN LATEX AGGLUTINATION

Question 3

LACTOFERRIN LATEX AGGLUTINATION is positive in

Answer 3

Positive in diarrhea with WBC: Salmonella, Shigella, Campylobacter, Yersinia, & entero-invasive E. coli

Question 4

LACTOFERRIN LATEX AGGLUTINATION is negative in

Answer 4

Negative in diarrhea without WBC: Staphylococcus aureus and Vibrio spp., viruses, and parasites

Question 5

Stool stained with either Wright’s or Gram stains provides permanent slides for evaluation.

Answer 5

DRIED PREPARATION