 According to the Canadian Medical Association Journal, the unapproved antibiotic ceftiofur is routinely injected into eggs in Quebec and Ontario to discourage infection of hatchlings.Although the data are contested by the industry, antibiotic resistance in humans appears to be directly related to the antibiotic's use in eggs.A recent study by the Translational Genomics Research Institute showed that nearly half (47%) of the meat and poultry in US grocery stores was contaminated with "S. aureus", with more than half (52%) of those bacteria resistant to antibiotics.