Ascariasis is caused by ingesting those worm eggs. This can happen when hands or fingers that have contaminated dirt on them are put in the mouth, or by eating vegetables or fruits that have not been carefully peeled, washed, or cooked. People with ascariasis often show no symptoms. 23 нояб. 2020 г.
What is the main human disease caused by roundworms?
Ascariasis is an infection of the small intestine caused by Ascaris lumbricoides, which is a species of roundworm. Roundworms are a type of parasitic worm. Infections caused by roundworms are fairly common. Ascariasis is the most common roundworm infection.
What is the main way that parasitic worms cause disease?
In the first stage, called trophozoite, the parasite swims around and consumes nutrients from the small bowel. In the second stage it develops into a non-moving cyst. Cysts excreted in faeces can contaminate the water supply, and ingesting contaminated food or water results in transmission.
What are roundworms caused by?
Causes. Many roundworm parasitic diseases are caused by poor sanitation and hygiene. Most roundworms or their eggs are found in the dirt and can be picked up on the hands and transferred to the mouth, or they can get into the body through the skin. Different species of roundworms cause different infections.
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