Every week the media carry stories about people becoming sick from bacteria in food. The bugs are passed to humans through beef, chicken, or pork, but sometimes from cheese, fruit and vegetables that are carelessly processed. The CDC says that reported cases of diseases from Salmonella and E. coli pathogens are ten times what they were two decades ago, and cases of Campylobacter are more than double. The CDC saw none of these bugs in meat until the late 1970s when factory farming became popular. The use of antibiotics in animal-feed may also be accelerating the alarming growth of antibiotic resistance.
Most reports blame doctors for over-prescribing antibiotics for people.
Antibiotics fed to animals eventually cause disease organisms to mutate stronger. Salmonella, E. coli, Campylobacter now have antibiotic resistant strains. If you eat a chicken with antibiotic resistant E. coli, you might become very sick, and antibiotics may not be able to help. In England, more than 4 million cattle were destroyed, because of fear of infection. The CDC is studying them.