What are the symptoms of amebiasis?

On average, about one in 10 people who are infected with
E. histolytica becomes sick from the infection. The symptoms often are quite mild and can include loose stools, stomach pain, and stomach cramping. Amebic dysentery is a severe form of amebiasis associated with stomach pain, bloody stools, and fever. Rarely, E. histolytica invades the liver and forms an abscess. Even less commonly, it spreads to other parts of the body, such as the lungs or brain. 

If I swallowed E. histolytica, how quickly would I become sick?

Usually 1 to 4 weeks later but sometimes more quickly or more slowly.

What should I do if I think I have amebiasis?