Knowledge, attitudes and practices relating to antibiotic use and antibiotic resistance among backyard pig farmers in rural Shandong province, China.

•Most backyard pig farmers had little training on raising pigs.•Farmers had low knowledge on antibiotics.•Farmers reported engaging in several irrational antibiotic use practices.•Household storage of antibiotics for pig use was common.•These results provide targets for interventions to improve antibiotic use.