More and more foodborne illnesses are resistant to antibiotics. A reason why:
An animal that routinely ingests antibiotics on a farm becomes a "factory" for drug-resistant bacteria, as described by a 2011 article in Clinical Microbiology Reviews. Huge farms known as CAFOs, for concentrated animal-feeding operations, may house as many as 160,000 broiler chickens and 800,000 hogs, a 2008 survey by the Government Accountability Office found.
These farms may pack animals like boxes in a warehouse: Hogs are kept in crates too small to turn around or lie down in, and laying hens are confined in cages the size of a sheet of paper. In badly run CAFOs, this overcrowding leads to filthy conditions that increase disease. When FDA inspectors examined Wright County Egg, an Iowa egg-production facility that likely contributed to almost 2,000 cases of salmonella in 2010, they found mice, flies, maggots and piles of manure up to 8 feet high.
The Dish 