Which parasite is commonly associated with soil contamination and intestinal issues?

The correct answer, Ascaris lumbricoides, is a large roundworm that is commonly associated with soil contamination, particularly in areas where sanitation is inadequate. This parasite is transmitted primarily through ingestion of eggs that are present in contaminated soil or food. Once ingested, the larvae hatch in the intestines, penetrate the intestinal wall, and migrate to the lungs before returning to the intestines to mature. This life cycle can lead to various intestinal issues, including malnutrition, growth impairment in children, and intestinal obstruction in heavy infections.

Understanding the transmission routes and health impacts of Ascaris lumbricoides highlights the importance of proper sanitation and hygiene practices in preventing parasitic infections, especially in areas with high rates of soil contamination.