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Live chat replay: microbiologist Keith Warriner on dirty hotels

Last week, CBC's Marketplace uncovered antibiotic-resistant bacteria on bathroom sinks, remote controls and bed throws. Warriner's tests found C. difficile, methicillin-resistant staphylococcus aureus (MRSA) and other such bugs in every one of the 54 hotels tested.

This week, the consumer watchdog show turns its attention to hotel ice machines and air vents.

Bacterial tests found coliform bacteria in the ice, a possible sign of fecal contamination. "The minimum standard is to have clean ice, and it's not difficult. All you have to do is maintain the machine... and it's obvious they're not doing that," Warriner told Marketplace.

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