The Playboy Mansion is one of several places L.A. County public health officials are investigating in an attempt to discover why at least 170 people had fallen ill after a four-day conference in L.A.

The possible outbreak of legionellosis, or Pontiac fever, affected people connected with the DOMAINfest Global Conference held at the Fairmont Miramar Hotel & Bungalows in Santa Monica on Feb. 1-3.

"The department is investigating several locations associated with this conference, including the Playboy Mansion in Holmby Hills," the statement said. "At this time, Public Health has not determined that the source of exposure is limited to a specific location. The department is working to conclusively identify the source of exposure and the likely cause of illness for this suspected outbreak."

Conference events included a Polynesian Paradise Party at the Fairmont Hotel on Feb. 1, a Golden Era of Hollywood Party at SkyBar on the Sunset Strip on Feb. 2 and the Playboy Mansion party hosted by Playmates Jennifer Walcott and Suzanne Stokes to benefit Jenny McCarthy's Generation Rescue Autism Foundation.

The outbreak is not believed to have spread beyond the conference, officials said.

The department was notified Friday of a "suspected respiratory infection outbreak" among those associated with the conference, and officials were still identifying and contacting possible victims Monday, the statement said.

The state Department of Public Health, the Centers for Disease Control and Prevention and surrounding county health departments are providing assistance "as a number of conference attendees live outside of Los Angeles County," the statement said. "Public Health has no information suggesting that this suspected outbreak extends beyond those individuals associated with this conference."