Three new cases of measles have been confirmed in Las Vegas, in people believed infected by a contagious worker at an upscale MGM Grand Hotel and Casino seafood restaurant, Nevada public health officials said on Friday. The newly diagnosed patients, two staff members and a patron of Emeril’s New Orleans Fish House at the MGM Grand, bring to nine the total number of measles cases reported in Clark County, Southern Nevada Health District spokeswoman Jennifer Sizemore said.