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The World Health Organization has released a sobering new report on the global spread of Multidrug and Extensively Drug-Resistant Tuberculosis (M/XDR-TB), and has posted a press release on their website summarizing the problem.
Drug-resistant tuberculosis now at record levels
18 MARCH 2010 | GENEVA | WASHINGTON DC -- In some areas of the world, one in four people with tuberculosis (TB) becomes ill with a form of the disease that can no longer be treated with standard drugs regimens, a World Health Organization (WHO) report says.
For example, 28% of all people newly diagnosed with TB in one region of north western Russia had the multidrug-resistant form of the disease (MDR-TB) in 2008. This is the highest level ever reported to WHO. Previously, the highest recorded level was 22% in Baku City, Azerbaijan, in 2007.
In the new WHO's Multidrug and Extensively Drug-Resistant Tuberculosis: 2010 Global Report on Surveillance and Response, it is estimated that 440 000 people had MDR-TB worldwide in 2008 and that a third of them died. In sheer numbers, Asia bears the brunt of the epidemic. Almost 50% of MDR-TB cases worldwide are estimated to occur in China and India. In Africa, estimates show 69 000 cases emerged, the vast majority of which went undiagnosed.
Encouraging signs
Tuberculosis programmes face tremendous challenges in reducing MDR-TB rates. But there are encouraging signs that even in the presence of severe epidemics, governments and partners can turn around MDR-TB by strengthening efforts to control the disease and implementing WHO recommendations.
Two regions in the Russian Federation, Orel and Tomsk, have achieved a remarkable decline in MDR-TB in about five years. These regions join two countries, Estonia and Latvia, which have reversed rising high rates of MDR-TB, ultimately achieving a decline. The United States of America and China, Hong Kong Special Administrative Region (SAR), have achieved sustained successes in controlling MDR-TB.
Slow progress
Progress remains slow in most other countries. Worldwide, of those patients receiving treatment, 60% were reported as cured. However, only an estimated 7% of all MDR-TB patients are diagnosed. This points to the urgent need for improvements in laboratory facilities, access to rapid diagnosis and treatment with more effective drugs and regimens shorter than the current two years.
WHO is engaged in a five year project to strengthen TB laboratories with rapid tests in nearly 30 countries. This will ensure more people benefit early from life-saving treatments. It is also working closely with the Global Fund to Fight AIDS, Tuberculosis and Malaria and the international community on increasing access to treatment.
Additional information
Multidrug-resistant TB (MDR-TB) is caused by bacteria that are resistant to at least isoniazid and rifampicin, the most effective anti-TB drugs. MDR-TB results from either primary infection with resistant bacteria or may develop in the course of a patient’s treatment.
Extensively drug-resistant TB (XDR-TB) is a form of TB caused by bacteria that are resistant to isoniazid and rifampicin (i.e. MDR-TB) as well as any fluoroquinolone and any of the second-line anti-TB injectable drugs (amikacin, kanamycin or capreomycin).
These forms of TB do not respond to the standard six-month treatment with first-line anti-TB drugs and can take up to two years or more to treat with drugs that are less potent, more toxic and much more expensive, from 50 to 200 times higher. While a course of standard TB drugs cost approximately US$ 20, MDR-TB drugs can cost up to US$ 5 000, and XDR-TB treatment is far more expensive.
In 2008, there were an estimated 9.4 million new TB cases, and 1.8 million TB deaths. 440 000 MDR-TB cases are estimated to have emerged in the same year with 150 000 MDR-TB deaths. No official estimates have been made on the number of XDR-TB cases, but there may be around 25 000 a year with most cases fatal. Since XDR-TB was first defined in 2006, a total of 58 countries have reported at least one case of XDR-TB.
For more information contact:
Glenn Thomas - Communication Officer
Stop TB, WHO
Mobile phone: +41 79 509 0677
E-mail: thomasg@who.int
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