Most savvy cooks know that raw eggs, meat, poultry, and shellfish should be handled with care because they most likely contain pathogenic bacteria. So they wash their hands after handling these products, take care to avoid cross-contamination, and sanitize surfaces after cooking. Cooking those foods will kill the pathogenic bacteria.
But did you know that uncooked flour can also be contaminated with pathogens? A study published in Foodborne Pathogens and Disease found that a cluster of Salmonella cases occurred in New Zealand in October 2008 linked to wheat-based poultry feed raw material. And raw flour caused an E. coli outbreak in the U.S. in 2009 that sickened 77 people in 30 states. In that case, the flour was in raw refrigerated,prepackaged cookie dough.
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