The Echinococcus Antibody, IgG (Hydatid Serology) test detects the presence of IgG antibodies against the Echinococcus parasite, which causes hydatid disease (also known as hydatidosis). This test helps diagnose infection with Echinococcus species, typically transmitted through contact with infected animals or consumption of contaminated food. A positive IgG result indicates a past or current infection, while a negative result suggests no exposure to the parasite. This test is useful for identifying hydatid cysts in organs such as the liver and lungs.