How to Collect and Store Stool Samples for Testing: 14 Standard Steps at Home

Each year, Vietnam records approximately 500,000–900,000 reported cases of diarrhea; this is one of the signs that may be related to intestinal bacteria, viruses, or parasites. When prescribed a stool test, many people often feel hesitant or anxious because they don't know how to collect a stool sample for testing cleanly, sufficiently, and without damaging the sample.

In reality, even a small error such as contaminating the sample with urine, toilet water, or submitting the sample too late can affect the quality of the analysis. In this article, Tiptory helps you understand how to discreetly and hygienically collect and store stool samples for testing at the right time, thereby helping your doctor accurately assess your digestive condition and avoid having to re-collect the sample.

How to collect a stool sample correctly at home

Prepare a clean collection surface

• Use clean plastic wrap to loosely cover the toilet bowl rim, under the seat, to catch the stool. This method makes collecting the stool sample for testing tidier.

• Do not collect the sample directly from the water in the toilet bowl.

• Avoid contaminating the sample with urine, toilet water, toilet paper, or detergents, as these can affect the stool test results.

Transfer the sample to a specialized container

• Use the spoon provided on the container lid or a tool provided by the medical facility to collect the amount of stool as instructed.

• Place the sample in a clean, dry, leak-proof container; do not touch the inside of the container or lid with your hands.

• Seal the lid tightly, write your full name, and the date and time of collection if the container label does not already have this information.

• Wash your hands thoroughly with soap and clean water after completion.

Submit the sample as soon as possible

• Prioritize taking the sample to the laboratory immediately after collection to ensure analysis quality.

• If you cannot submit it immediately, follow the instructions for storing the stool sample for testing provided on the requisition form or kit. For some tests, the sample may need to be refrigerated; however, not all types of stool tests follow the same method.

• Do not leave the sample too long or freeze it without specific instructions from the testing facility. Each testing technique has its own requirements for storage time and temperature.

Collect a sample for a mail-in test kit

• Only use the sampling stick or brush provided in the kit.

• Follow the accompanying instructions carefully, especially regarding the sampling location, the number of swipes, and packaging.

• Seal the sample, fill in the necessary information, and send it within the kit's specified timeframe. Do not replace specialized tools with ordinary containers or bags.

Part 1: How to correctly collect a stool sample at home

Step 1: Wash hands properly when collecting a stool sample

Wash your hands thoroughly before collecting the sample

• Before collecting a stool sample for testing, wash your hands with soap and clean water for at least 20 seconds.

• Clean the palms, backs of hands, between fingers, fingertips, and wrists. Then dry with a clean towel or disposable paper.

• This helps limit bacteria from your hands from contaminating the sample, supporting a more reliable stool test process.

Use disposable gloves when necessary

• You can wear disposable gloves for a more discreet and hygienic procedure, especially when assisting children, the elderly, or sick individuals with sample collection.

• Gloves do not replace hand washing. Do not touch your face, phone, doorknobs, or other objects while wearing gloves.

• Remove gloves carefully, discard them in the trash, and wash your hands immediately afterward.

Wash your hands after completion

• Daniel Carter Family general practitioner

  Holds an MD from Johns Hopkins University, with 12 years of experience in community health and chronic disease management. Currently works at Cleveland Clinic, specializing in comprehensive healthcare consulting for multi-generational families.