Echinococcus granulosus

Echinococcus granulosa (echinococcosis granulosa) is a disease caused by infection of larvae of Echinococcus granulosus in animals. It is transmitted between humans and animals. Dogs are their ultimate hosts. Sheep and cattle are their intermediate hosts. Therefore, the disease is prevalent in animal husbandry areas. Humans can also become intermediate hosts due to inadvertent feeding of eggs. Hydatid disease occurs. Hydatid cysts are most common in the liver, followed by the lungs, and other organs such as the brain and bones are occasionally invaded. At present, 21 provinces (municipalities and districts) have reported primary human, animal hydatid disease, and home and dog Echinococcus granulosus infections. The endemic areas are mainly distributed in pastoral and agricultural and pastoral areas in the west, north and northwest, with Tibet, Qinghai, Sichuan, Xinjiang, Gansu, Ningxia, Inner Mongolia and Yunnan being the most severe.