With the help of one of Canada’s top microbiologists, we tested six of the country’s largest hotel chains in three major cities: Montreal, Toronto and Vancouver. Using black light, hidden cameras, an adenosine tri-phosphate (ATP) machine that measures microbial contamination, contact plates and lab testing, we collected thousands of samples. The results were troubling: filthy bed linens and toilets, telephones and TV remote control devices - high touch areas of a hotel room – riddled with germs and bacteria, including superbugs. We discovered antibioticresistant bacteria in every hotel we tested. The Dirt on Hotels revealed the hidden health risks for hotel guests. And it prompted the industry to promise to clean up its act.