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Cepheid Receives FDA Market Authorization for Xpert MTB/RIF

July 26, 2013 By Cepheid

Cepheid (Nasdaq: CPHD) has announced that it has received market authorization from the U.S. Food & Drug Administration (FDA) for its Xpert MTB/RIF test. The review decision was based on the de novo 510(k) review process, which allows novel products without predicates to be down-classified and brought to market. Xpert MTB/RIF is designed for the rapid molecular detection of Mycobacterium tuberculosis complex (MTB-complex) DNA and, in specimens where MTB-complex DNA is detected, Xpert MTB/RIF also detects rifampin-resistance associated mutations of the rpoB gene. 

“With results available to clinicians in approximately 2 hours instead of weeks, the dramatic impact of Xpert MTB/RIF on identifying TB positive patients and optimizing their drug therapy has been well documented outside of the U.S.,” said John Bishop, Cepheid’s Chairman and Chief Executive Officer. “Now, U.S. clinicians can leverage those same transformative results not only for the detection of TB (tuberculosis), but also for detecting whether the strain may be multidrug-resistant, requiring more intensive drug therapy.”

Designed for use on Cepheid’s GeneXpert Systems, Xpert MTB/RIF not only detects the presence of MTB-complex DNA, but also mutations associated with resistance to rifampin, a critical first-line drug for treatment of the disease and a reliable surrogate marker of strains that may be multidrug-resistant (MDR-TB). Patients with multidrug-resistant TB need more intensive and prolonged therapy. Xpert MTB/RIF will enable U.S. clinicians to significantly improve patient outcomes by providing rapid results that guide therapy decisions early in the course of disease, not 6 weeks later as is the case with standard laboratory methods.

“Xpert MTB/RIF is the most technologically advanced test for TB ever developed, yet it is simple enough to be performed across multiple shifts in laboratories across the country,” said David H. Persing, M.D., Ph.D., Cepheid’s Chief Medical and Technology Officer. “About one-third of the human population is infected with TB, but most do not have active disease that requires treatment. Ruling out active disease in TB suspects is a relatively common task of domestic clinical laboratories. We think that the Xpert MTB/RIF test will help to eliminate guesswork and deliver maximum medical value in the management of TB here in the U.S., as already demonstrated abroad.”

In the early 1900s TB was the leading cause of death in the United States. Tuberculosis disease and deaths have declined steadily from the early 1900s due largely to the introduction of effective antibiotics and improvements in living conditions. While some improvements in global control of TB have been achieved over the last decade, TB continues to be a leading cause of death from an infectious disease in many countries. In 1993, the World Health Organization (WHO) declared TB a “global health emergency.”

While TB in the U.S. is at its lowest level since 1953, rapid and accurate diagnosis of TB continues to be a challenge, especially among immunocompromised patients and the elderly. The symptoms of TB in its early stages are similar to many different types of infections, thus having an accurate test to rule out the disease is critical for managing patients in the U.S. According to the CDC, in 2012 63% of reported TB cases in the U.S. occurred in foreign-born persons, with case rates that were 11.5 times higher than among U.S. born persons.  Yet, any nationality can fall victim to this disease. Returning U.S. travelers may also carry the disease and it can be just as deadly, especially if it is drug resistant. The ability of Xpert MTB/RIF to provide rapid information on the presence of TB and potential drug resistance within two hours distinguishes it from other available TB tests.   

Tuberculosis remains a major global health concern, with an estimated 8.7 million new cases reported worldwide in 2011 according to the WHO. Continuing the decline in TB cases in the United States will require sustained focus on domestic TB control activities and further support of global TB control initiatives.

Xpert MTB/RIF is now available for immediate shipment in the U.S. For more information on Xpert MTB/RIF and Cepheid’s entire portfolio of molecular diagnostic tests visit www.cepheid.com.

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