A stool routine examination is a laboratory test used to analyze a stool (feces) sample for abnormalities in the digestive system. It helps diagnose gastrointestinal disorders like infections, malabsorption, inflammation, and certain cancers. The test assesses physical, chemical, and microscopic aspects of the stool, giving insights into digestion, absorption, and possible pathogens.

Risk Assessment

The test poses no direct risk since it only involves stool collection, but it can reveal significant health issues:

• Infection Risk: Indicating bacterial, viral, or parasitic infections.
• Inflammation: May point to inflammatory bowel disease (IBD) like Crohn’s disease or ulcerative colitis.
• Malabsorption: Conditions like celiac disease, lactose intolerance, or pancreatic insufficiency can be detected.
• Cancer Detection: Occult blood may indicate gastrointestinal malignancies such as colorectal cancer.

Normal Range and Interpretation

1. Color:

   • Normal: Brown
   • Abnormal:
     • Clay-colored (bile duct obstruction),
     • Black tarry (bleeding in upper GI tract),
     • Red (lower GI tract bleeding),
     • Green (rapid transit through the intestine or diet-related).

2. Consistency:

   • Normal: Well-formed and soft.
   • Abnormal:
     • Watery (diarrhea),
     • Hard (constipation).

3. pH:

   • Normal: 6.5–7.5.
   • Abnormal:
     • Acidic (<6.0) may suggest carbohydrate malabsorption (e.g., lactose intolerance),
     • Alkaline (>8.0) may indicate bacterial overgrowth.

4. Occult Blood:

   • Normal: Negative.
   • Abnormal: Positive could indicate gastrointestinal bleeding, ulcers, or colorectal cancer.

5. Pus Cells:

   • Normal: 0-2/hpf (high-power field).
   • Abnormal: Increased numbers suggest an infection or inflammatory process like colitis.

6. Red Blood Cells (RBCs):

   • Normal: Absent.
   • Abnormal: Presence may indicate bleeding in the gastrointestinal tract.

7. Ova and Parasites:

   • Normal: None detected.
   • Abnormal: Presence suggests a parasitic infection (e.g., Giardia, Ascaris, etc.).

8. Fat:

   • Normal: Minimal.
   • Abnormal: Steatorrhea (excess fat in stool) may suggest malabsorption conditions like celiac disease or pancreatitis.

9. Undigested Food:

   • Normal: Minimal.
   • Abnormal: Indicates rapid transit through the digestive system or poor digestion.

Normal results indicate healthy digestion and absence of infection or disease.

Abnormal results prompt further investigations, like imaging studies, colonoscopy, or blood tests, to diagnose the underlying condition. For instance:

• • Positive occult blood may require a colonoscopy to rule out colorectal cancer.
  • The presence of parasites would suggest treatment with antiparasitic medication.
  • High fat content suggests malabsorption and may lead to tests for celiac disease or pancreatic disorders.

Stool sample (feces): A small amount of stool is collected in a clean container. The sample should be fresh and uncontaminated by urine or water.