Stool specimen collection is ordered by clinicians to investigate gastrointestinal symptoms that remain unexplained after a physical examination. Midwives practicing in Nigeria frequently encounter conditions such as persistent diarrhea, severe abdominal cramping, and signs of gastrointestinal bleeding in both antenatal and postnatal settings. Analyzing feces helps identify bacterial pathogens, viral agents, protozoa, and helminths causing infectious gastroenteritis. Screening for occult or hidden blood is also vital for detecting early signs of intestinal pathology, such as hemorrhoids or malignancies, which can manifest during pregnancy or the puerperium.
Clear communication ensures the collection of a contamination-free sample. Explain the procedure simply to the patient, emphasizing why urine must not mix with the stool. Provide a clean, dry, wide-mouthed container with a secure lid along with a tongue depressor or collection spoon. Instruct the patient to pass urine first before passing feces, as urine introduces extraneous bacteria and alters chemical properties. For specific tests, dietary restrictions such as avoiding red meat or certain iron supplements may be necessary several days prior to testing to prevent false-positive occult blood results.
Collect feces using a clean bedpan, commode specimen catcher, or plastic wrap draped over the toilet rim. Transfer a representative portion—about walnut-sized for solid stool or 15 to 30 milliliters for liquid stool—into the specimen container using a clean applicator stick. Never collect stool directly from the toilet bowl water, as disinfectants and water contamination compromise laboratory analysis.
Perform macroscopic examination immediately after collection, noting several key physical characteristics:
Different diagnostic tests require distinct handling protocols to yield accurate laboratory results.
Feces contain numerous pathogens, including enteric bacteria, viruses, and parasite eggs, posing a transmission risk to healthcare workers and patients. Always wear clean disposable examination gloves during collection, handling, and macroscopic observation. Perform thorough hand hygiene with soap and water or alcohol-based hand rub immediately after removing gloves. Decontaminate reusable collection pans or commode chairs using standard hospital-grade disinfectants. Ensure specimen containers are tightly sealed and placed inside leak-proof biohazard bags before transport to prevent environmental contamination.
Accurate record-keeping completes the diagnostic process. Label the specimen container securely in the presence of the patient, including their full name, hospital number, date, time of collection, and the specific test requested. Complete the laboratory request form with relevant clinical details, such as recent antibiotic use or gastrointestinal symptoms. Document the collection in the patient's nursing notes, detailing the date, time, stool consistency, color, and any abnormal findings observed. Promptly transport the specimen to the laboratory to preserve sample integrity and ensure timely diagnosis and treatment.