Understanding Lab Tests for Strongyloidiasis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Strongyloidiasis is a parasitic infection caused by the roundworm Strongyloides stercoralis. This infection can range from mild to severe, and in some cases can become life-threatening, particularly in individuals with compromised immune systems. Accurate diagnosis requires specific laboratory testing to detect the parasite and assess risk factors.
Top Recommended Test
Ova & Parasites w/Giardia Antigen (Stool)
This is the primary diagnostic test for strongyloidiasis. It directly identifies Strongyloides stercoralis larvae in stool samples, providing definitive evidence of infection. The test is specifically designed to detect various parasites, including the roundworm responsible for this condition.
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Diagnosing Strongyloidiasis
Since strongyloidiasis symptoms can be subtle or mimic other conditions, laboratory testing is essential for definitive diagnosis. The primary diagnostic approach involves detecting parasite larvae in stool samples, while additional testing may be necessary to identify risk factors that could lead to severe complications.
Other Relevant Tests
Human T-Cell Lymphotropic Virus I, II (HTLV-I/HTLV-II) Antibodies, Preliminary Test W/ Confirmation
This test screens for HTLV-I/II antibodies, which is crucial because strongyloidiasis can become severe or even fatal in people with HTLV-I infection. Identifying co-infection with HTLV helps healthcare providers assess the risk of complications and determine appropriate treatment intensity.
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Why Comprehensive Testing Matters
While the stool test directly diagnoses the parasitic infection, screening for HTLV co-infection is equally important for risk assessment. Patients with both conditions require more aggressive treatment and closer monitoring due to the increased risk of hyperinfection syndrome, a potentially life-threatening complication.
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.
