Understanding Lab Tests for Ascariasis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Ascariasis is a parasitic infection caused by the roundworm Ascaris lumbricoides. This intestinal parasite is one of the most common worm infections worldwide, particularly in areas with poor sanitation. A specific lab test is required to accurately diagnose this infection by detecting the presence of roundworm eggs.
Recommended Test
Ova & Parasites w/Giardia Antigen (Stool)
This comprehensive stool test is the primary diagnostic tool for ascariasis. It can identify the eggs (ova) of Ascaris lumbricoides roundworms in stool samples, confirming an active parasitic infection. The presence of these eggs indicates that the roundworms are reproducing in the intestinal tract and require treatment.
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Diagnosing Ascariasis
While some people with ascariasis may not experience symptoms, others may have abdominal pain, nausea, or digestive issues. Because these symptoms can overlap with other gastrointestinal conditions, a definitive diagnosis relies on laboratory testing that can directly identify the parasite or its eggs in stool samples.
Understanding the Test Results
A positive result indicates the presence of Ascaris lumbricoides eggs in the stool, confirming an active infection that typically requires antiparasitic medication. Early detection and treatment are important to prevent complications such as intestinal blockage or migration of worms to other organs.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment of parasitic infections.
