Samples

For fecal sample submission, fresh feces is preferable, submitted in a screw-cap vial. If the specimen will be delayed for more than a few hours, the sample may be left at room temperature, refrigerated, or fixed. DO NOT freeze or incubate. For fixation, split the sample into two vials, one containing 5-10% formalin and the other containing PVA (polyvinyl alcohol) fixative. Fixative should be added at a ratio of three parts fixative to one part specimen, thoroughly mixed to ensure adequate fixation. Please indicate the time of collection on the submission form. Specimen containers should have leak-proof, screw-on caps.