TB can lie dormant years blood tests designed to detect TB active they are inaccurate and should be banned, said the World Health Organization.More than two million such tests are carried out annually, but who says that they are immoral and lead to misdiagnosis and mistreatment for patients.
Review of the Organization of these tuberculosis test kits says give wrong results in about 50% of cases.
The kits are sold mainly in the developing world.
However, the majority of the 18 teams in the market are produced in Europe and North America.
According to Dr. Mario Raviglone, director of the Stop TB Department, testing should be prohibited.
He said: "a blood test for the diagnosis of active TB disease is bad practice." "The evidence is inconsistent, inaccurate patients lives and endanger."
Evidence of work through the detection of antibodies or antigens in blood that occur in response to the bacteria.
But some of these commercial tests what has been called "low responsiveness" which leads to a large number of patients that was told to have no TB when they do.
'Immoral'Dr. Karen Weyer, who is also the Department who stop TB, added: "the evidence reviewed in the past two months shows one of every two patients will be erroneously diagnosed, either [as] false negative or false positive."
"If it is a false negative patients to obtain the clear when in fact they have TB, the disease continues to spread, and patients may die."
"Read the main storyare making very strong Governments impetus to keep in mind that TB is a threat and the use of these ineffective tests is also a threat"end quote Dr Karen Weyer, that "If, on the other hand, false positive, patients get treatment unnecessarily while the real cause of the disease remains undiagnosed".
"This would describe as a little ethics - and we are making very strong Governments impetus to keep in mind that TB is a threat and the use of these ineffective tests is also a threat."
WHO says that the tests that are manufactured in Europe and North America can not go on sale where are due to regulations that require ample evidence of accuracy.
But this is not the case in the developing world – including the India and China.
Dr Weyer added: "one of the main problems is that these developing countries often have little or very weak regulatory mechanisms to ensure that tests are registered before use at the country level."
"Another problem is that these tests are often used in the private sector, which is a difficult area regularly and as a result, there is a wide misuse, I would say these inaccurate test in the private sector in at least 17 countries that we know."
He said that it was necessary for a TB test that could be used "in bed". But he added: "Does not have a blood test for TB which can be used at the time of care level".
WHO says that the call for a ban is a highly unusual - step is the first time that the Organization has issued an explicitly political negative recommendation against a practice that is widely used in the care of tuberculosis.
Tuberculosis kills 1.7 million people each year and they are the largest cause of death for people living with HIV.
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