The World Health Organisation (WHO) called on Wednesday for an immediate halt to the use of blood tests to detect active tuberculosis, saying they were faulty and leave millions of people at risk. Production of the test kits, WHO officials said, was largely by Western companies which export them to developing countries because they have not passed regulatory standards in rich nations. “Overwhelming evidence showed that the blood tests produced an unacceptable level of wrong results” which led to misdiagnosis and mistreatment, the United Nations agency said after a year-long analysis.
