Guidelines to patient preparation for sample collection for the stool test (helminth eggs, cysts and vegetative form of protozoans)

  1. Feces shall be collected in the morning. Feces shall be delivered to the laboratory within one hour after collection. If this is impractical, a sample may be collected earlier, but in any case no more than 8 hours before it is delivered to the laboratory. In this case, the sample shall be kept in a refrigerator (do not freeze) (inpatients shall use the sample refrigerator in Room V201).
  2. Urinate before collecting sample.
  3. Before collection of feces, wash external genital organs and anus thoroughly.
  4. Collect feces into a special container -- a clean dry glass or plastic vessel with cap (for best results, use special disposable plastic containers with a screw cap and a spatula). Total weight of the collected material shall be 15 to 20 grams (approximately a tea spoonful); feces shall be collected following a spontaneous defecation.
  5. Use of a matchbox as a container for feces is STRICTLY FORBIDDEN
  6. Feces studies shall not be performed less than two days after administering an enema.
  7. Contrast-assisted X-ray examination, colonoscopy or gastroscopy shall be performed no sooner than seven to ten days before the study.
  8. Stop taking antibiotics, pharmaceuticals that affect bowel motility and using rectal suppositories three days before sample collection.
  9. Refrain from taking pharmaceuticals containing iron, bismuth, barium, castor oil or liquid paraffin.
  10. Stop the intake of tomatoes, tomato juice or paste, beet and other vegetables and fruits containing any colorants.
  11. The diet shall include vegetables and fruits, grain porridges and fermented milk products. The amount of food shall be within the normal range. Refrain from any fatty foodstuffs, smoked, spicy and pickled products.
  12. It is not recommended to perform stool examination during menstruation.
  13. The presence of helminth eggs and protozoan cysts in feces is directly affected by the life cycle of parasites. Thus, study results may appear negative even in cases of an evident infection. To ensure accurate results, it is recommended to perform feces examinations three times with three to seven days between them. 1
  14. Do not collect feces of infants from diapers. Use a swaddling cloth to collect feces.