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FDA Approves a New Indication for BioThrax

by Bidita Debnath on November 25, 2015 at 12:38 AM
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 FDA Approves a New Indication for BioThrax

To prevent disease following suspected or confirmed exposure to Bacillus anthracis, the bacterium that causes anthrax disease, the FDA announced that it has approved a new indication for BioThrax (Anthrax Vaccine Adsorbed).

The vaccine's new use is approved for people 18 through 65 years of age in conjunction with recommended antibiotic treatment. BioThrax was initially approved by the FDA in 1970 for the prevention of anthrax disease in persons at high risk of exposure.

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Researchers assessed levels of protective antibodies in the blood of rabbits and monkeys to predict efficacy to "predict efficacy in humans based on an assessment of the extent of antibody response achieved in human study participants."

Anthrax disease, especially the inhalation form, is often fatal if not promptly treated. Anthrax is considered one of the more likely agents to be used in a biological attack, primarily because its spores are very stable and easy to disperse.
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Although it is rare, people may contract anthrax disease through natural exposures, such as contact with infected animals or contaminated animal products.

Infected rabbits treated with post-exposure antibiotic and BioThrax had a survival rate of 70 to 100 percent, depending on the vaccine dose administered.

The safety and antibody responses to BioThrax in humans were evaluated in a multi-center study conducted in the United States. The majority of study participants generated antibody responses that correlated to a 70 percent probability of survival that was observed in animal models.

BioThrax is manufactured by Emergent BioDefense Operations Lansing LLC, based in Lansing, Michigan.

Source: Medindia
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