Entamoeba is a genus of single-celled organisms known as protozoa. These tiny creatures can be found in various environments, including soil and water. Some species, like Entamoeba histolytica, are known to cause diseases in humans, particularly amoebic dysentery, which can lead to severe intestinal issues. These organisms typically enter the human body through contaminated food or water. Once inside, they can invade the intestinal lining, causing inflammation and other health problems. Proper sanitation and hygiene practices are essential to prevent infections caused by Entamoeba and to maintain overall health.