A gastro outbreak has hit nearly 200 people aboard cruise ship Ovation of the Seas, which is docked in Hobart.
Almost 200 passengers on one of the world's largest cruise ships have been treated for gastro as the liner docked in Hobart.
Ovation of the Seas, which carries more than 5800 people, had been sailing for two weeks and arrived in Tasmania on Tuesday, after a trip to Singapore.
Royal Caribbean International, which owns the ship, said 195 people received over-the-counter medication for gastroenteritis.
The ship will be "comprehensively sanitised and cleansed" once it arrives at its next port in Sydney and before new passengers board.
A video was posted on Facebook of crew members spraying the boat's hallways.
Tasmania's Director of Public Health Mark Veitch said five people from the ship had been taken to hospital but couldn't confirm whether any were suffering from gastro.
"Outbreaks of highly infectious conditions such as gastro and respiratory illness can occur in cruise ships, where a population the size of a medium-sized town mixes closely together," he said.
Ovation of the Seas is expected to leave Tasmania on Tuesday afternoon.