Canadian students who took a flight to Changchun on May 2 from Canada via Beijing for exchange studies, smile and wave their hands on a coach as the quarantine ends in Changchun, capital of northeast China's Jilin Province, May 7, 2009.(Xinhua/Hao Shouzhi)

One passenger from a flu-affected Mexican flight has been kept in quarantine with a fever while the other 127 have been released at the end of their quarantine period, said China's Ministry of Health on Thursday.

The passenger has shown symptoms of fever, conjunctiva congestion and throat inflammation since Wednesday, said the ministry. 

Samples have been sent for test, although the result is not yet known, said the ministry.

A total of 166 passengers who had been on board flight AM098 on April 30 were held under quarantine on the mainland after a Mexican, one of the travelers, was confirmed to have influenza A/H1N1 on May 1 in Hong Kong.

Among them, 38 Mexicans were flown back to Mexico on Monday and the remaining 128 passengers were placed in quarantine in 18 provinces, autonomous regions and municipalities across China.

The quarantine was for seven days and expired on Thursday morning for those with no flu-like symptoms.

The ministry did not release any of details of the passenger who remains in isolation, nor where he or she is.