'I don't see a problem': Tyson Foods CEO on factory farming and antibiotic resistance

While promising to reduce use of human antibiotics, Donnie Smith says there is no evidence that intensive farming is to blame for spread of resistant bacteria

The meat industry has reason to be worried. The last line of antibiotic defence against some serious infections is under threat - and blame is being directed at the livestock sector, accused of overuse or misuse of drugs. In the US, more antibiotics are sold for food producing animals than for people.

As one of the world's biggest and most profitable meat brands US-based Tyson Foods has promised to end the use of human antibiotics. But how committed is it to cleaning up its act? Does it believe there is a problem, or is it all about good PR?