Fecalysis with Occult Blood (Guaiac)


Test Methodology

  • Guaiac Method and Light Microscopy

Running Day

  • Daily 

Turn Around Time

  • Routine: Two hours
  • STAT: One hour

Specimen Requirement

  • Stool sample should be submitted one hour of collection; At least thumb size for formed specimens approximately 2 to 5 tbsp. if watery, Mucoid or loose

Patient Preparation

  • Red meat-free diet for two days prior to collection; Raw fruits and vegetables which contain peroxidase-like substances (e.g. turnips, cauliflower, cantaloupe, red radish, etc.) should be avoided during the test period

Special Considerations

  • Watery, diarrheic, loose, and mucoid consistencies should be processed within 30 minutes of collection