Russian authorities have stated that multiple diseases are complicating an outbreak of cattle illness in Siberia, which has led to mass culling. The outbreak, blamed on pasteurellosis and rabies, has sparked protests and calls for the resignation of top government officials overseeing agriculture. The U.S. Department of Agriculture's Foreign Agriculture Service (FAS) suggested that the scale of these measures may indicate an unconfirmed outbreak of foot-and-mouth disease. The FAS also warned of concerns about the adequacy of current vaccines and the potential impact on Russia's cattle trade.