The Entamoeba histolytica IgG Antibody (Amoebiasis) test is a blood test used to detect the presence of IgG antibodies against the Entamoeba histolytica parasite in the body. This parasite is responsible for causing amoebiasis, a type of infectious disease that affects the intestines and liver. The test is particularly useful in diagnosing patients who have symptoms of amoebiasis but have received treatment with antibiotics, making it difficult to detect the parasite itself. The presence of IgG antibodies indicates that the body has been exposed to the parasite at some point in the past, and the test can help in identifying current or past infections. This test is important for people who live in or travel to areas where amoebiasis is common, as well as for people who have a weakened immune system.