wann ist eine stuhlprobe unbrauchbar — what can you do yourself?

A stool sample becomes unusable if it is not collected, stored, or shipped according to the specific test kit instructions. Common errors include: contact with urine or toilet water, using a non-sterile container, storage at room temperature for too long (usually >24 hours), exposure to heat (e.g., mailbox in summer), or freezing when the kit requires refrigeration. Insufficient sample volume or mixing with foreign material (e.g., toilet paper) also invalidates the sample. What you can do yourself: Read the kit manual thoroughly before collection; use the provided tube and scoop; collect immediately after bowel movement; avoid urine contamination; store the sample cool and dark; ship it the same day if possible (Mon–Thu). When in doubt, contact customer support. Important: An unusable result cannot replace medical diagnosis – if you have diarrhea, blood in stool, or persistent symptoms, see a doctor. The evidence for these recommendations comes from laboratory practice and kit manufacturer guidelines, not from controlled trials.