How to store stool samples for analysis

Stool , also known as fecal specimens, are commonly used for diagnostic in various medical fields. They provide valuable information about the gastrointestinal tract, including the presence of pathogens, parasites, or other abnormalities. Proper storage of samples is crucial for accurate analysis and interpretation of results. This article will guide you on how to store stool samples effectively.

1. Collection Container:
When ing a stool sample, it is important to use a clean, leak-proof, and sterile container. Most laboratories provide specific containers designed for this purpose, which may include preservatives or transport media. If such containers are unavailable, a clean, airtight plastic container with a tight-fitting lid can be used as an alternative.

2. Timing and Handling:
Collect the sample as per the instructions provided by the healthcare professional or laboratory. Timing is a crucial factor; it is recommended to collect the stool sample within 24 to 48 hours before the analysis. During this period, the sample should be stored at a cool temperature, preferably in a refrigerator, to maintain its integrity.

3. Labeling and Identification:
It is essential to label the collection container with the patient’s full name, date of birth, collection date, and any relevant patient identifiers. This ensures that the sample doesn’t get mixed up with other specimens, minimizing errors during the analysis process. Use a permanent marker to clearly label the container.

4. Contamination Prevention:
To prevent contamination, it is crucial to avoid contact between the stool sample and the external environment. Wear gloves while collecting and handling the sample. Ensure the collection container doesn’t come into contact with any surfaces, including the toilet seat or floor. This helps maintain the sample’s pristine condition and reduces the risk of erroneous results.

5. Sample Quantity:
When collecting a stool sample, ensure an adequate quantity for analysis. Most laboratories require at least 10 grams of stool. Collecting samples from different parts of the stool helps ensure a representative analysis. However, excessive water or urine should be avoided as it may dilute the sample and affect the accuracy of the results.

6. Storage Conditions:
Maintaining appropriate storage conditions is essential to the quality of the stool sample. Ideally, the sample should be stored at a temperature between 2 to 8 degrees Celsius (35.6 to 46.4 degrees Fahrenheit) during transportation and until analysis. Make sure the sample is tightly sealed to prevent any leakage and maintain its freshness.

7. Duration of Storage:
While prompt submission of the stool sample to the laboratory is preferred, it may not always be possible. If a delay in transportation or processing occurs, the sample can be stored for up to 72 hours in a refrigerator at the recommended temperature. However, it is advisable to consult the laboratory for specific guidance, as different tests may have varied storage requirements.

8. Transportation:
When transporting the stool sample to the laboratory, place the sealed container in a biohazard bag to prevent any potential leakage or contamination. Ensure the sample remains upright throughout transportation and avoid exposure to extreme temperatures. Also, consider using a courier service that specializes in medical specimen transportation for optimal handling.

In conclusion, the proper storage of stool samples is essential for accurate analysis and diagnosis. By following the guidelines mentioned above, you can ensure the integrity and quality of the sample, leading to reliable results. Remember to consult your healthcare professional or laboratory for any specific instructions or requirements regarding stool sample collection and storage.