(CNN) Curacao health officials have tested passengers aboard the Church of Scientology cruise ship Freewinds for measles after a staff member came down with a suspected case of the disease last week.

Freewinds was quarantined after arriving at St. Lucia last Tuesday and a female crew member was placed in isolation inside the ship as health officials on the Caribbean island feared more people could be sick.

The ship was allowed to return to Curacao harbor, its home port, on Saturday morning.

A total of nine medical professionals and authorities led by Dr. Izzy Gerstenbluth went on the ship as representatives of the Curacao Health Department Sunday, according to CNN affiliate Telecuracao.

Gerstenbluth told Telecuracao the medical team had been impressed with the quarantine conditions on the ship.

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