wie lange kann man eine stuhlprobe aufbewahren — what does this mean exactly?

The storage duration of a stool sample depends heavily on the intended analysis. For routine stool tests (e.g., occult blood, parasites, bacterial culture): at room temperature, the sample should be processed within 2–4 hours; refrigerated (2–8 °C), it is typically stable for 24–48 hours. For microbiome analyses (e.g., 16S rRNA sequencing), immediate freezing at −20 °C or −80 °C or use of a preservation buffer (e.g., DNA/RNA Shield) is critical, as bacterial composition can shift due to ongoing metabolism or cell lysis. Many commercial test kits (e.g., for MyBody-X stool tests) include a tube with stabilizer that allows storage at room temperature for days to weeks – always follow the manufacturer's instructions. Improper storage can lead to false negatives or positives. When in doubt, consult the laboratory. The evidence is based on standard laboratory practice, not on a specific study from the provided context.