Patients receive treatment at the Chest Disease Hospital in Srinagar, India. The country has one of the highest rates of drug-resistant tuberculosis in the world, in part because antibiotics for the disease are poorly regulated by the government. Dar Yasin/AP hide caption

itoggle caption Dar Yasin/AP

Tyson Foods says it has already reduced its use of human-use antibiotics by 80 percent over the past four years. Here, Tyson frozen chicken on display at Piazza's market in Palo Alto, Calif., in 2010. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

An order of McDonald's Chicken McNuggets in Olmsted Falls, Ohio. McDonald's says it plans to start using chicken raised without antibiotics important to human medicine. Mark Duncan/AP hide caption

itoggle caption Mark Duncan/AP

An employee of the drug company Apotex, examines some Ciprofloxacin at the plant in Canada. Cipro is commonly given to travelers for diarrhea. More than 20 million Cipro doses are prescribed each year in the U.S. Getty Images hide caption

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You don't want to run into methicillin-resistantStaphylococcus aureus (MRSA) bacteria. A potential new antibiotic could help fight this bug. CDC hide caption

itoggle caption CDC

David Livermore, the director of the Antibiotic Resistance Monitoring and Reference Laboratory in London, studies a new class of superbugs, called carbapenem-resistant Enterobacteriaceae, or CRE. Suzanne Plunkett/Reuters /Landov hide caption

itoggle caption Suzanne Plunkett/Reuters /Landov

Yes, you could do this at home. Growing bacteria you find in a pile of dirt or a local pond might reveal the next big antibiotic. Charlotte Raymond/Science Source hide caption

itoggle caption Charlotte Raymond/Science Source

Young broilers nibble feed at a chicken farm in Luling, Texas. The Food and Drug Administration has issued new guidance on how drug companies label antibiotics for livestock. Bob Nichols/USDA/Flickr hide caption

itoggle caption Bob Nichols/USDA/Flickr

Turkeys sit in a barn in Sonoma, Calif. An estimated 46 million turkeys are cooked and eaten during Thanksgiving meals in the U.S. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images