In the United States, federal officials have acknowledged knowing about the dangerous bacteria found in turkey produced by the food giant Cargill well before this month’s massive recall. In one of the largest meat recalls in U.S. history, Cargill recalled 36 million pounds of ground turkey after at least one person died from Salmonella, and another 76 people fell ill from turkey products traced to Cargill’s processing plant in Springdale, Arkansas. The U.S. Department of Agriculture says it discovered a dangerous form of Salmonella in Cargill’s turkey at least once last year and four times this year, but did not push for a recall until the outbreak occurred. The USDA cited agency rules that do not hold Salmonella as a dangerous contaminant in meat, unless that meat results in illness or death.