China’s foreign ministry denied on Thursday that US diplomats in the country had been required to take anal swab tests for COVID-19, after media outlets reported that some had complained about the procedure.
US media outlet Vice cited on Wednesday a State Department official as saying the test was given in error and that China had said it would halt such tests on US diplomats.
“To my knowledge…China has never required US diplomatic staff stationed in China to conduct anal swab tests,” foreign ministry spokesman Zhao Lijian told a daily news briefing in Beijing.
In an email to Reuters, a State Department representative said it was “committed to guaranteeing the safety and security of American diplomats and their families, while preserving their dignity”.
A number of Chinese cities used samples taken from the anus to detect potential COVID-19 infections as screening toughened up during a spate of regional outbreaks ahead of the Lunar New Year holidays.
Last month, Li Tongzeng, a respiratory diseases doctor in Beijing, told state television that tests using anal swabs can avoid missing infections as virus traces in faecal samples or anal swabs could remain detectable for a longer time than in those from the respiratory tract.
Stool tests may also be more effective in finding infections in children and infants as their waste carries a higher viral load than adults, researchers at the Chinese University of Hong Kong said in a paper published last year.