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Ascaris Lumbricoides: Disease-causing Worm
Popularly known as roundworm, ascariasis is a parasitosis caused by the nematode worm Ascaris lumbricoides.
This sexually reproducing parasite can reach up to 40 cm in length. Usually the female is much larger than the male.
Their eggs are "microscopic" and usually come out next to their host's feces. It develops in hot and humid environments. The soil of tropical countries is the type of environment considered ideal for its development.
Contamination and Cycle
Contamination by this parasite occurs through the consumption of water or food infected by its eggs.
Once ingested, the larvae are released into the small intestine and reach the circulatory system, reaching the liver, where they grow in less than a week. After this, they return to the bloodstream through the heart and lungs.
Inside the lungs, they absorb more nutrients and plenty of oxygen to ensure their growth. When they grow too large to remain within the pulmonary alveoli, these larvae rise toward the pharynx, where they are mostly swallowed.
Through the digestive tract they reach the stomach and reach the place where they complete their development into adulthood: the small intestine.
During its stay in its host's small intestine, it will reproduce and release new eggs that will begin the entire trajectory already explained.
Personal hygiene and sanitation are important factors in preventing infection with this parasite. Hygiene measures during food preparation, especially with regard to vegetables, are also indispensable measures.
IMPORTANT: The information on this page is only a source for research and school work. Therefore, they should not be used for medical advice. To do so, see a doctor for guidance and proper treatment.