Only about 10% to 20% of people who are infected with E. histolytica become sick from the infection.
The symptoms are often quite mild and can include:
- Diarrhoea
- Stomach pain
- 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 (a collection of pus). In a small number of instances, it has been shown to spread to other parts of the body, such as the lungs or brain, but this is very uncommon.