Longpicker; thanks for the new info and on topic questions, doing a couple Google searches, did find at least one other similar website on GBS.
Web site does have a couple links to Cepheid IDI-Strep B assay test, but the links appear to no longer work. Researching Cepheid site for this test did not return any results. Google search indicates FDA approved the test in roughly 2002. Therefore my impression, understanding is that this is old info and Cepheid no longer markets this test.
Cepheid appears to be marketing the Xpert GBS test for GBS at present. Per the Cepheid website:
"Cepheid's Xpert® GBS test is the only in vitro diagnostic test to fully meet CDC criteria for rapid intrapartum GBS testing. With results in just over 35 minutes for positive and 52 minutes for negative, Xpert GBS delivers 91.9% sensitivity and 95.6% specificity." Therefore this test is faster than the recently published paper by TMC-UTHSC in 6-1/2 hours, but neither is giving 100% results.
Seems to me the Cepheid PCR test can not do AST. Therefore while fast - accurate detection of GBS is helpful, then what? Nano's working on both rapid detection and AST, per the recently published 6-1/2 hour Nano test would also provide AST so that the doctors know how to actually effectively treat the disease. Do others know how Cepheid recommends to determine proper treatment after the Xpert GBS test?
Yes we all know about the GeneXpert. So does Dr. Faro and every other OB. If it did everything, and they loved it, why would he and others be putting so much time and effort into a culture based AST rapid test? Seems to me there is an unmet need.
Don't believe CPHD is in the business of making or advocating treatment decisions after a test result is produced by their instruments. Physicians call and I'd defer to the 2010 CDC GBS guidelines for treatment decisions.