A cruise ship carrying hundreds of quarantined international holidaymakers docked in virus-hit Italy Wednesday, after a woman who tested positive disembarked in Greece, sparking fears among those on board.

"We're all very, very, very concerned," Dutch passenger Hans Rijkelijkhuizen told AFP from aboard the Costa Victoria.

The vessel has been looking for a safe port after evacuating an Argentine woman who fell ill with respiratory problems.

The vessel has been looking for a safe port after evacuating an Argentine woman who fell ill with respiratory problems
The vessel has been looking for a safe port after evacuating an Argentine woman who fell ill with respiratory problems AFP / ANDREAS SOLARO

The 726 passengers were placed in lockdown in their cabins on Monday after the woman, 63, was taken off the ship in Crete.

"There are lots of people on board with a temperature," said Rijkelijkhuizen, 78, who was on the cruise with his 74-year old wife.

Rijkelijkhuizen, who had a slight fever and a cough, said many, including he and his wife, had been given paracetamol by the ship doctor.

"Do we have the virus? We don't know," he said, standing on the tiny balcony of his cabin in a red wind jacket.

Passengers have been instructed to stay in their cabins
Passengers have been instructed to stay in their cabins AFP / Andreas SOLARO

Briton Rimal Shah, 56, was on the ship with 18 friends from London -- most of them in their 70s with pre-existing health conditions.

There was "a lot of anxiety on board", said Shah.

Civitavecchia mayor Ernesto Tedesco wants anyone infected with the virus to kept on board the cruise ship in quarantine
Civitavecchia mayor Ernesto Tedesco wants anyone infected with the virus to kept on board the cruise ship in quarantine AFP / Andreas SOLARO

"That woman with the coronavirus will have been roaming the ship for days before being disembarked," he told AFP.

The liner had been due to sail to Venice, but frightened passengers had begged not to be taken to northern Italy.

The region has been hit particularly hard by a highly infectious disease that has claimed over 6,800 lives across the country so far.

"They wanted to take us into the mouth of the virus," Shah said.

IMAGES Italy's Costa Cruises ship Costa Victoria docks at the port of Civitavecchia, some 70 kilometres northwest of Rome. Italy's Costa Cruises said it was isolating more than 700 guests on board its Victoria ship after one of them tested positive for th
IMAGES Italy's Costa Cruises ship Costa Victoria docks at the port of Civitavecchia, some 70 kilometres northwest of Rome. Italy's Costa Cruises said it was isolating more than 700 guests on board its Victoria ship after one of them tested positive for the novel coronavirus. AFP / Andreas SOLARO

Italian health authorities boarded the Victoria on its arrival, but Rijkelijkhuizen said the passengers had not been tested.

He and the Spanish and German couples in his neighbouring cabins waited anxiously for news, picking listlessly at their lunch of pasta, chips, rice and a king prawn.

Most of the liner's balconies were empty. On one, a lone figure could be seen jogging on the spot for exercise.

A message in multiple languages over loudspeaker called passengers from specific decks to the ship's theatre to have their temperatures taken, while warning all others: "Stay in your cabins."

Civitavecchia's mayor Ernesto Tedesco said he had tried to stop the liner, which has a large number of Australian and French passengers, from docking -- but had been overruled.

Those given the green light to disembark would be allowed off on Thursday morning, he said.

"I expect anyone with the virus to be quarantined on the ship. Those who disembark will not be allowed in my town. I don't want suitcase-wheeling tourists here," he said.

Those allowed off the Victoria would likely be put on coaches and taken directly to Rome's Fiumicino airport, the mayor said.

Shah said he had been lobbying the British government to fly his group home.

He had repeatedly requested Costa cancel the cruise early in the month-long trip, when stop after stop was cancelled, but had been "stonewalled".

Another Costa cruise ship with suspected coronavirus cases, the Diadema, was also making its way to Italy. It is expected to arrive in Civitavecchia on Friday.

Another with breathing difficulties had since also been disembarked and hospitalised, while five more were showing flu-like symptoms, the company said.