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Optimer Pharmaceuticals Phase 3 Clinical Trials show Fidaxomicin is Superior to Vancomycin in Treatment of Recurrent Clostridium difficile Infection (CDI); Data Presented at ICAAC
Date:9/14/2010

onCDI has become a significant medical problem in hospitals, long-term care facilities, and in the community.  It is a serious illness caused by infection of the inner lining of the colon by C. difficile bacteria, which produces toxins that cause inflammation of the colon, severe diarrhea and, in the most serious cases, death.  Patients typically develop CDI from the use of broad-spectrum antibiotics that disrupt normal gastrointestinal (gut) flora, and thus allowing C. difficile bacteria to flourish.

Current therapeutic options for CDI include the off-label use of metronidazole and oral vancomycin, the only FDA-approved treatment.  However, approximately 20% to 30% of CDI patients who initially respond to these treatments experience a clinical recurrence following cessation of antibiotic administration.

Primary risk factors for CDI include broad-spectrum antibiotic use (such as cephalosporins and fluoroquinolones), advanced age (over 65) and exposure to emerging hyper-virulent strains (BI/NAP1/027, 078, 001) of C. difficile. Increasing incidence, higher treatment failures and recurrence with current therapies have resulted in greater awareness and concern of CDI among medical professionals and public health officials.

About FidaxomicinFidaxomicin is the first in a new class of antibiotics called macrocycles, which inhibit the bacterial enzyme RNA polymerase, resulting in the death of C. difficile. The narrow-spectrum profile of fidaxomicin may eradicate C. difficile selectively with minimal disruption to the normal intestinal flora, while the alternative antibiotics to treat CDI, metronidazole and vancomycin, disrupt the flora. Fidaxomicin may facilitate the return of normal physiological conditions in the colon which may be responsible for reducing CDI recurrence.

About Optimer PharmaceuticalsOptimer Pharmaceuticals, Inc. is a biopharmaceutical company focused on discoverin
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