HOUSTON, Texas -

A cruise ship is to set sail from a Houston-area port two days after returning from a cruise a day early with more than 180 ill passengers and crew aboard.     

The Caribbean Princess is to embark on a cruise of the western Caribbean on Saturday, two days after its early return from a similar cruise.     

Princess Cruises had said the Caribbean Princess returned early on Thursday because of a dense-fog advisory, not because of an outbreak of vomiting and diarrhea.     

A spokeswoman for the U.S. Centers of Disease Control and Prevention and Prevention says that CDC investigators had found nothing unusual or unique about the Caribbean Princess illnesses as of late Friday.