High anti-Ascaris seroprevalence in fattening pigs in Sichuan, China, calls for improved management strategies.

To our knowledge, this is the first study to measure anti-Ascaris seroprevalence in China. The results of this 'snapshot' investigation indicate that Ascaris infection in commercial pig farms in Sichuan Province is seriously underestimated, encouraging future, large-scale serological studies to assess the distribution and extent of Ascaris exposure and infection in various regions of China and the world.