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FDA allows marketing of test to identify organisms that cause bloodstream infections and provide antibiotic sensitivity results
Date:2/24/2017

SILVER SPRING, Md., Feb. 23, 2017 /PRNewswire-USNewswire/ -- The U.S. Food and Drug Administration today allowed marketing of the PhenoTest BC Kit, performed on the Pheno System. This is the first test to identify organisms that cause bloodstream infections and provide information about which antibiotics the organism is likely to respond to (antibiotic sensitivity). The test also reduces the amount of time it takes to provide this important information, which can guide antibiotic treatment recommendations more quickly.

"By identifying organisms and knowing earlier which antibiotics the organism is likely to respond to, health care professionals can treat patients with bloodstream infections more appropriately," said Alberto Gutierrez, Ph.D., director of the Office of In Vitro Diagnostics and Radiological Health at the FDA's Center for Devices and Radiological Health.

Bacterial or yeast blood infections can occur in patients of all ages, but are particularly severe in infants, the elderly and those with weakened immune systems. If not treated rapidly, such bloodstream infections can lead to severe complications, such as septic shock and death. Unlike traditional identification and antibiotic susceptibility tests that may take 24 to 48 hours after detection in a positive blood culture to provide test results, the PhenoTest BC Kit can identify bacteria or yeast from a positive blood culture in approximately 1.5 hours. For certain organisms, the test also provides important information to guide treatment recommendations in approximately 6.5 hours after the organisms are detected from blood cultures.

The test can identify 14 different species of bacteria and two species of yeast that cause bloodstream infections, while also providing antibiotic sensitivity information on 18 selected antibiotics for a subset of the identified organisms as appropriate. The test will also identify the presence of two indicators of antibiotic resistance, which can occur when potentially harmful bacteria change in a way that reduces or eliminates the effectiveness of antibiotics.

The PhenoTest BC Kit works by measuring the similarity of the infection-causing organism's genetic material to DNA known to be unique to specific bacteria or yeast. Once the organism is identified, it is mixed with antibiotics and the growth of the bacteria is measured by time-lapse images. If the organism does not grow when the antibiotic is present, this means that an antibiotic can possibly be used for treatment.

The FDA reviewed the data for the PhenoTest BC Kit through the de novo premarket review pathway, a regulatory pathway for devices of a new type with low-to-moderate-risk that are not substantially equivalent to an already legally marketed device and for which special controls can be developed, in addition to general controls, to provide a reasonable assurance of safety and effectiveness of the devices. The FDA's decision to allow marketing was based largely on its review of the sponsor's primary clinical study of 1,850 positive blood cultures. In this study, the PhenoTest BC Kit provided correct identification of the bacteria or yeast in the positive blood culture more than 95 percent of the time. Results for testing whether the bacteria were sensitive to antibiotics were also accurate when compared to traditional tests.

Risks associated with use of the PhenoTest BC Kit include false positive findings, which can occur when an individual not infected with organisms that cause bloodstream infections receives a test result that incorrectly indicates that he or she is infected. Results obtained from the test should always be interpreted alongside additional laboratory test results.

The PhenoTest BC Kit and the Pheno System are manufactured by Accelerate Diagnostics Inc. in Tucson, Arizona.

For more information:
FDA: Medical Devices 
FDA: Office of In Vitro Diagnostics and Radiological Health 
Evaluation of Automatic Class III Designation (De Novo) Summaries

The FDA, an agency within the U.S. Department of Health and Human Services, protects the public health by assuring the safety, effectiveness, and security of human and veterinary drugs, vaccines and other biological products for human use, and medical devices. The agency also is responsible for the safety and security of our nation's food supply, cosmetics, dietary supplements, products that give off electronic radiation, and for regulating tobacco products.

Media Inquiries: Tara Goodin, 240-402-3157, tara.goodin@fda.hhs.gov
Consumer Inquiries: 888-INFO-FDA

 

To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/fda-allows-marketing-of-test-to-identify-organisms-that-cause-bloodstream-infections-and-provide-antibiotic-sensitivity-results-300412894.html


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