More than 2,000 doctors and nurses from private and state hospitals are ready to provide medical care for foreign royalty attending the 60th anniversary celebrations of His Majesty the King's accession to the throne.

Caretaker Public Health Minister Pinij Charusombat said a number of medical personnel were on standby at the medical war room, located at Lerdsin General Hospital, with more stationed at the 13 hotels where the royals are residing during their stay.

Fully equipped ambulances are also stationed at the hotels, while the surveillance system for diseases such as flu, food poisoning and accidents is the priority for the medical teams, he said.

Pinij also said that a number of doctors had been briefed to prepare for possible biological-weapon attacks.

Public Health permanent secretary Pratch Boonyawongwiroj said heart specialists were on standby at Siriraj Hospital and Chest Institute, while neurological and accident specialists were on standby at Chulalongkorn Hospital, as well as Lerdsin General and Rajvithi hospitals.

These medical teams will remain on standby until Wednesday, said Dr Suravith Techathuwanandm, deputy director-general of the Medical Services Department, adding that additional teams of doctors were also on standby in Phuket and Chiang Mai.

The visiting royals are from Bahrain, Belgium, Bhutan, Brunei, Cambodia, Denmark, Japan, Jordan, Kuwait, Lesotho, Liechtenstein, Luxembourg, Malaysia, Monaco, Morocco, the Netherlands, Norway, Oman, Qatar, Spain, Swaziland, Sweden, Tonga, the United Arab Emirates, and the United Kingdom.

Meanwhile, some 100 mobile medical units attended to about 9,000 people on the first day of the royal anniversary celebrations on Friday.

Most casualties were due to fainting.