Media playback is unsupported on your device

Mystery disease tying snakes up in knots

14 August 2012 Last updated at 13:16 BST

Scientists believe a virus that usually affects rodents is the cause of a mysterious snake disease.

Inclusion Body Disease makes pythons and boa constrictors tie themselves up in knots, roll on their backs and "stargaze".

Dr Joseph De Risi from the University of California told 5 liveBreakfast that the illness has affected snakes all over the world.

To listen to other Radio 5 live interviews, please visit the Best Bits page.