Intestinal parasitic infection occurs when parasites invade and colonize the digestive tract, causing digestive symptoms and nutrient malabsorption. It is caused by various organisms including roundworms (Ascaris lumbricoides), hookworms (Ancylostoma and Necator species), whipworms (Trichuris trichiura), and protozoa like Giardia lamblia. The Ova & Parasites with Giardia Antigen stool test is the most important test for diagnosis because it detects parasite eggs, larvae, and specific antigens in a single comprehensive analysis.
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Intestinal parasitic infections are caused by various organisms including roundworms (Ascaris lumbricoides), hookworms (Ancylostoma duodenale and Necator americanus), whipworms (Trichuris trichiura), and protozoa like Giardia lamblia and Entamoeba histolytica. These parasites typically enter your body through contaminated food or water, unwashed hands, or contact with infected soil. Once ingested, they establish themselves in your intestines where they feed, reproduce, and release eggs that pass through your stool, potentially infecting others and perpetuating the cycle of infection.
The Ova & Parasites with Giardia Antigen stool test is the most important test for intestinal parasitic infections because it provides comprehensive detection of multiple parasite types in a single analysis. This test examines stool samples under a microscope to identify parasite eggs (ova), larvae, and adult forms of roundworms, hookworms, whipworms, and other helminths. It also includes a specific Giardia antigen test that detects this common protozoan parasite with high sensitivity. Multiple stool samples collected over several days may be recommended since parasites shed eggs intermittently, and testing multiple samples increases the chance of detection and ensures accurate diagnosis.
You should get tested if you have persistent diarrhea lasting more than a few days, especially if you notice mucus or blood in your stool, or experience unexplained abdominal cramping and bloating. Testing is particularly important if you have recently traveled to developing countries with poor sanitation, have been exposed to contaminated water sources, work in childcare or with animals, or live with someone diagnosed with parasites. You should also consider testing if you experience unexplained weight loss, chronic fatigue, nausea, or nutrient deficiencies despite eating well, as these can indicate a parasitic infection that is interfering with nutrient absorption.
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What this means
Your test came back negative, meaning no Giardia parasites were detected in your stool sample. This is the expected and healthy result, indicating that Giardia is not the cause of any digestive symptoms you may be experiencing.
Recommended actions
Practice good hand hygiene, especially before eating and after using the bathroom
When traveling, drink only bottled or treated water and avoid raw foods
If digestive symptoms persist, consider testing for other causes or consult your doctor
Maintain proper food handling and cooking practices at home
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