The Norwegian Dawn cruise ship is seen in a July 26, 2024 file photo as it arrives at the dock in Portland, England. FINNBARR WEBSTER/GETTY

A U.S.-owned luxury cruise ship with more than 3,000 passengers and crew was allowed to dock Monday in the Indian Ocean island of Mauritius after being quarantined offshore for a day over fears of a possible cholera outbreak onboard, authorities said.

The Mauritius government cleared the Norwegian Dawn, which is owned and operated by the Miami-based Norwegian Cruise Line company, to dock at the harbor in the capital, Port Louis, after health officials found no traces of cholera in tests conducted on samples from the ship.

Mauritius authorities blocked the ship from docking Sunday because 15 people onboard were experiencing vomiting and diarrhea. The Mauritius Ports Authority said it took the decision "in order to avoid any health risks," and sent officials onboard to collect the samples for testing.

The Mauritius government said the sick passengers who had been isolated after falling ill in fact had mild cases of the viral infection gastroenteritis.

Norwegian Cruise Line said in a statement that there were "a small number of guests experiencing mild symptoms of a stomach-related illness" and there were "no confirmed cases nor any evidence of cholera."

The Mauritius government "required testing in an overabundance of caution," it added.

Several countries in mainland southern African have experienced serious outbreaks of cholera over the last year, possibly leading to the concern from authorities in Mauritius, an island nation of about 1.2 million people off the east coast of Africa that's a popular tourist destination.

Cruise ships were problematic during the COVID-19 pandemic, with many of them reporting outbreaks of the disease and having to be quarantined at ports.

The United Nations Office for the Coordination of Humanitarian Affairs says there's a cholera epidemic in southern Africa, with a total of around 188,000 cases and 3,000 deaths in eight countries since January 2023.

Cholera spreads through food or water contaminated with the bacteria that causes the disease. Health officials were also testing the food on the Norwegian Dawn for cholera. Those tests results hadn't yet come back, but authorities said they were satisfied that there was no cholera threat after the waste water tests were negative.

There were 2,184 passengers and 1,026 crew members onboard the Norwegian Dawn when it arrived in Mauritius, the ports authority said. Around 2,000 of those passengers were due to disembark in Mauritius and end their cruise and 2,279 new passengers were due to get onboard.

Everyone leaving the ship would still be screened by health officials, said Dr Bhooshun Ori, the director of health services at the Mauritius Ministry of Health.

Norwegian Cruise Line said passengers would disembark from the ship on Tuesday.

The 964-feet long Norwegian Dawn has 14 decks, with a casino, a theater and a video game arcade among its facilities.

A regular cabin starts at around $2,000 per person for a 12-day cruise, according to the company's website. For $47,000, you can have a 3-bedroom Garden Villa that comes with a private garden, a hot tub, an outdoor dining area and your own butler service.

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