Stool, colonic aspirate or small bowel aspirate in a clean leak-proof screw-cap container or O&P vials
Unpreserved specimen: at room temperature within 30 minutes of collection. Transport preserved specimens at room temperature.
Unpreserved specimens: 30 minutes
Preserved specimens: 2 weeks at room temperature
Colonic or duodenal washings due to dilution factor
Specimens containing barium
Specimens submitted on swabs or in diapers
Within 2 hours of receipt in the laboratory
If patient has had barium: specimen should not be submitted until >=7 days later.