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This post is part of the Science Tuesday feature series on the USDA blog. Check back each week as we showcase stories and news from USDA's rich science and research profile.

When it comes to microorganisms that contaminate our foods, you may think it’s a veritable jungle out there—but in fact, in the United States, most of the illnesses, hospitalizations and deaths caused by foodborne pathogens come down to 14 bad players.

Cross posted from the White House blog:

With the holiday season in full swing, many of us are thinking about the meals we’ll soon be sharing with family and friends.  Whether it’s turkey and egg nog, or latkes, or a New Year’s buffet, food is always a central and cherished part of the festivities. Of course, we all know that a necessary ingredient for any meal is food safety.

When the President came into office, he said that “protecting the safety of our food and drugs is one of the most fundamental responsibilities government has.” He pledged to strengthen our food safety laws and to enhance the government’s food safety performance.

National Preparedness Month is a good opportunity to reflect on progress towards ensuring the security of our Nation’s food supply.  The U.S. Department of Agriculture (USDA) considers defense of the food and agriculture sector critical– all the way from farm to fork. Some animal or plant diseases could have drastic consequences on our economy - yet another reason it’s important that we continue our efforts to improve food and agricultural emergency preparedness and response.

You probably are familiar with many of the USDA agencies whose animal, plant and or food inspection programs have touched your life at some point whether traveling or simply buying meat or poultry sold in grocery stores.

For example, USDA’s Food Safety and Inspection Service (FSIS), Animal and Plant Health Inspection Service (APHIS) and National Institute of Food and Agriculture (NIFA) enhance agricultural security through numerous programs.  These programs range from inspecting native and foreign agricultural products, to evaluating food system vulnerabilities,  to maintaining laboratory networks that can rapidly identify diseases and pests.  To illustrate, some of our efforts over the last year include:

Here in Washington, D.C., and probably where you live too, it is hot! This week’s Check Your Steps blog focuses on a timely food safety step—Chill. You may feel like this guy, but in reality we don’t recommend keeping your food cold with fans, no matter how many you can find.

Bacteria grow rapidly between 40 °F and 140 °F, and when it’s above 90 °F outside, cold food heats to those temperatures much faster. Portable coolers can be your best friend during outdoor summer activities or grocery shopping, but pack them correctly to keep food at 40 °F or below so it doesn’t spoil or make you sick.

For the past two Tuesdays as part of the Food Safe Families campaign, I’ve blogged about two basic food safety steps that are important but easy to implement in your food prep routine—cook and clean. Today, I’m going to focus on preventing a sneaky food safety hazard that can happen at many points between purchasing and eating food: cross-contamination.

Cross-contamination occurs when juices from uncooked foods come in contact with safely cooked foods, or with other raw foods that don’t need to be cooked, like fruits and vegetables. The juices from some raw foods, like meats and seafood, can contain harmful bacteria that could make you and your family sick.

Bacteria exist everywhere in our environment, and some of them can make us really sick. Illness-causing bacteria exist in or on food, on countertops, kitchen utensils, hands, pets, and in the dirt where food grows. As part of the Food Safe Families campaign, this week’s Check Your Steps blog focuses on cleaning before, during, and after preparing and eating food to keep your family safer from food poisoning.

Today, USDA and the Department of Health and Human Services launched a true first for our departments and our nation’s public health system. USDA’s Food Safety and Inspection Service partnered with the Food and Drug Administration, the Centers for Disease Control and Prevention, and the Ad Council to debut a joint, national, multimedia public service campaign called Food Safe Families to help Americans prevent food-related illnesses in their homes. With this campaign, we’re trying to shift the way people think about food handling so they can take a more proactive, preventive approach at home to help reduce food-related illnesses.