BANGKOK – Thai authorities took nearly four days to confirm the country’s first case of Middle East respiratory syndrome (MERS), the health ministry said on Friday, a time lag likely to raise fears of a further spread of the deadly virus in Asia.
Thailand confirmed its first case of MERS on Thursday, a 75-year-old businessman from Oman, just as an outbreak in South Korea that began last month and has infected 166 people, and killed 24 of them, appeared to be leveling off.
The infected man arrived in Bangkok on Monday on an Oman Air flight for medical treatment for a heart ailment at a private hospital.
Public Health Minister Rajata Rajatanavin declined to identify the hospital and said the patient had been put in quarantine at an infectious diseases institute in Bangkok on Thursday.
“It took about four days to diagnose this case and two lab tests,” Rajata said. Authorities wanted to monitor all 106 people on board the man’s flight, he said, though it was not clear how everyone could be traced.
Among those being monitored were the man’s two sons, who were considered at high risk because of their proximity to their father. The two had been tested and results were due later on Friday, Rajata said.
Most of those under observation had been told to stay at home for 14 days.
The Thai case will compound fears in Asia of a repeat of a 2002-2003 outbreak of severe acute respiratory syndrome (SARS), which began in China and killed about 800 people globally.
MERS was first identified in humans in Saudi Arabia in 2012, and the majority of cases have been in the Middle East.
Isolated cases have cropped up in Asia before South Korea’s outbreak began last month, and Thailand is the fourth Asian country to register a case.
China has had one case recently, that of a South Korean man who traveled to China via Hong Kong despite authorities suggesting he stay in voluntary quarantine at home.
South Korea’s outbreak, the largest outside Saudi Arabia, has been traced to a 68-year-old man who returned from a business trip to the Middle East in early May.
It has spread through hospitals with all of its infections known to have occurred in health care facilities.
The outbreak in South Korea appeared to have peaked, with just one new case reported on Friday and the number of people in quarantine down 12 percent to 5,930, though authorities were taking no chances.
“Given the current developments, we have judged that it has levelled off, but we need to watch further spread, further cases from so-called intensive control hospitals,” the South Korean health ministry’s chief policy official, Kwan Deok-cheol, told a briefing in Seoul.
As part of those efforts, South Korean authorities were contacting nearly 42,000 people who had visited a hospital in the capital, Seoul, which is at the center of the outbreak, with half of the country’s infections happening there.
Thailand was screening passengers from countries seen at risk of MERS and stepping up public information about the virus, another health official said.
The Middle East is an important source of tourists for Thailand, with arrivals from the region up by nearly 50 percent in January, according to the tourism office.
Bangkok is also one of the region’s main aviation hubs.
The vast majority of MERS infections have been in Saudi Arabia, where more than 1,000 people have been infected since 2012, and about 454 have died. There is no cure.