Vegas Casino Warning After Legionnaire's Cases

A top Las Vegas casino resort has issued a health warning to past guests after six people came down with Legionnaire's disease, health authorities said Monday.

Citing "an abundance of caution," the Aria Resort & Casino has written to people who stayed there between June 21 and July 4 when tests showed elevated levels of Legionella bacteria in some of its guest rooms.

The Southern Nevada Health District said it was working with the resort "to notify guests and to monitor the water system" in response to reports from the U.S. Centers for Disease Control on the six cases.

"The guests were treated and have since recovered," it added, praising the Aria for being "very cooperative" and saying: "The hotel will not be closed and it is currently remedying the situation in a multi-pronged approach.

"Aria has made adjustments to its water management plans to address this issue on an ongoing basis. The Southern Nevada Health District continues to work closely with the resort on its ongoing monitoring efforts."

In a letter to customers dated July 13, Aria said that, "in an abundance of caution, we are attempting to notify guests who may have been exposed to these bacteria during this short period" of June 21-July 4.

Describing the symptoms -- fever, chills, cough, fatigue and muscle aches -- it said: "If you have developed any combination of these symptoms, we encourage you to see your doctor."

And it added: "Our most recent test results indicate that no detectable level of active Legionella bacteria was present in any of the locations tested... We will continue to monitor our water quality on an ongoing basis."