This category compiles articles on stool-based laboratory tests used in clinical practice. Each article explains why the test is ordered, what it measures, and how the sample should be collected and handled. Topics include routine stool examination, occult blood tests, stool culture, ova and parasite examination, fat estimation, and tests for infections such as bacterial, viral, or parasitic diseases. Clear explanations of normal findings, abnormal results, and their clinical significance are provided, helping patients, students, and healthcare professionals understand how stool tests contribute to diagnosing digestive problems, infections, and overall intestinal health.