Ascariasis is a parasitic intestinal infection that affects millions of people worldwide, particularly in areas with poor sanitation. It is caused by the roundworm Ascaris lumbricoides, which infects the intestines after a person ingests its eggs from contaminated food, water, or soil. The Ova & Parasites with Giardia Antigen (Stool) test is the most important test for diagnosis because it directly detects roundworm eggs in stool samples, confirming active infection.
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Ascariasis is caused by swallowing the eggs of Ascaris lumbricoides roundworms, which are found in contaminated soil, water, or food. These microscopic eggs enter the body when people consume unwashed fruits and vegetables, drink contaminated water, or touch their mouth with dirty hands that have been in contact with infected soil. Once swallowed, the eggs hatch in the intestines, and the larvae migrate through the bloodstream to the lungs before returning to the intestines where they mature into adult worms that can grow up to 12 inches long and reproduce by laying thousands of eggs daily.
The Ova & Parasites with Giardia Antigen (Stool) test is the most important test for ascariasis because it directly detects the eggs (ova) of Ascaris lumbricoides roundworms in your stool sample. This comprehensive stool analysis can identify the characteristic barrel-shaped eggs with thick, bumpy shells that are uniquely produced by these roundworms, confirming an active infection. The test is highly reliable because adult female worms lay thousands of eggs daily, making detection straightforward in most cases. Finding these eggs in your stool means the worms are actively reproducing in your intestines and require antiparasitic treatment to eliminate the infection.
You should get tested if you experience unexplained abdominal pain, nausea, diarrhea, or visible worms in your stool, especially if you have recently traveled to areas with poor sanitation or consumed potentially contaminated food or water. Testing is also recommended if you develop respiratory symptoms like coughing or wheezing along with digestive issues, as migrating larvae can pass through the lungs. Children who show signs of malnutrition, growth delays, or unexplained intestinal discomfort should be tested, particularly if they have been playing in soil or living in areas where ascariasis is common.
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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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