Officials with Princess Cruise Lines say a stomach virus affected nearly 100 passengers on a ship that arrived in South Florida. Meanwhile, passengers on another ship were complaining of gastrointestinal illness.A total of 92 passengers and 13 crew members on the Ruby Princess were affected by the Norovirus, which causes vomiting, diarrhea and stomach pain. The ship returns to South Florida on Sunday.Meanwhile, there has been an increase in the number of cases of gastrointestinal illness among passengers on Crown Princess, which docked Saturday at Port Everglades.Spokeswoman Julie Benson says the cases do not appear to be related. The cause of the illness has not yet been determined.All cabins and public areas on the ships are being disinfected, which will delay their next departures.