Two separate cases of Legionnaires’ disease among guests of the Rio All-Suite Hotel and Casino sparked an investigation of the hotel by the Southern Nevada Health District. The guests stayed at the hotel at different times in March and April of 2017. A water sample taken by health officials from the hotel’s water system after the two cases were reported showed presence of Legionella bacteria. The district’s environmental health supervisor, Mark Bergtholdt, reportedly stated that large buildings- such as the Rio hotel- would be common homes to Legionella bacteria due to the complex plumbing systems, in which water may lay stagnant for long periods…