About 200 people have been struck down with gastro aboard a cruise ship which is set to dock in Brisbane today.

The Sea Princess, part of the Princess Cruises fleet, is completing the final leg of a two‑week round trip between Brisbane and New Zealand.

Queensland Health confirmed onboard testing found norovirus to be the cause of increased gastro cases.

In an email to passengers, Princess Cruises said it had been "carrying out a comprehensive sanitation program in coordination with several international public health authorities".

The Sea Princess can hold up to 2000 guests and 910 crew, and features a four‑storey atrium, casino, pools and sporting facilities.

Fares for the 14‑day New Zealand cruise range from $2000 to $6,600 per person.

Source: ABC