The disease is manifested in an abdominal pain (colic) with diarrhea. About 10% of the world’s population is believed to be infected with amoebae of the genus Entamoeba, the most dangerous of which is Entamoeba histolytica, a protozoan4 that causes amebiasis.
The disease is asymptomatic in about 50% of those infected. In others, it usually manifests as chronic diarrhea or an amoebic abscess. Amoebic abscesses5 most often occur in the liver, but may also be found more rarely in other organs (eg the lung or brain).