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roundworm
- Roundworms are the most common type of worm infection. It is estimated that there are 4,000, ... soil. Ingestion of contaminated soil then leads to roundworm infection. (Image courtesy of the Centers for Disease ...
- ... is an egg of Ascaris lumbricoides . Ascarides are roundworms, a common parasitic infection throughout the world. It ... of the world population) may be infected with roundworms.