Natural infection of the ground squirrel (Spermophilus spp.) with Echinococcus granulosus in China.

Background: Echinococcus granulosus is usually transmitted between canid definitive hosts and ungulate intermediate hosts.

Methodology/principal Findings: Lesions found in the livers of ground squirrels, Spermophilus dauricus/alashanicus, trapped in Ningxia Hui Autonomous Region, an area in China co-endemic for both E. granulosus and E.