A woman whose three-foot-long snake slithered away from her in a US underground carriage and hid there for nearly a month has received a hefty cleaning bill.
Transport officials want Melissa Moorhouse to pay 650 US dollars to cover the costs of disinfecting and sanitising the Boston Red Line train to protect passengers from germs such as salmonella that may have been left by a boa constrictor named Penelope.
Ms Moorhouse had travelled with the snake around her neck and lost it between stations on January 6. The snake was spotted on the train earlier this month by a commuter.
The Boston Globe reported the Massachusetts Bay Transportation Authority said some underground riders wrote in with health concerns.
Ms Moorhouse said she will pay more attention the next time she takes the snake out in public.