An Australian man who recorded an elevated temperature has been told to stay at his home in Thailand after returning from the Democratic Republic of Congo, where 49 people have died of Ebola.

The unnamed man returned to Thailand on October 17 from the DRC, where he works in the oil-drilling industry.

He lives in Trat province, 312km southeast of Bangkok.

Reports on Sunday said Trat Hospital had been asked by the Thai public health office to prepare "to put a patient under investigation", after he recorded an elevated temperature when he was tested at Bangkok international airport.