On (b)(6) 2015 a customer in (b)(6), reported a false resistant result when using product chromid (tm).The patient's nasal specimen was incubated for 24 hours, there was no enrichment phase.It was confirmed the device was used prior to expiration date, plates inoculated on (b)(6) and read on (b)(6) 2015.Identification was later performed using vitek.Customer confirmed the incorrect result was not provided to the treating physician, no patient harmed but there was a 24 hour delay in providing correct results.
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Biomérieux internal investigation was conducted.Evaluation of the manufacturing qc batch records indicates no discrepancies were detected during the manufacturing, and the chromid tm mrsa agar performed in accordance with specifications as indicated in the quality certificate.Investigation testing included: vitek 2 gp id identified staphylococcus aureus.Two (2) random lots of chromid mrsa agar (customer lot was expired) using the customer submitted strain, staphylococcus aureus atcc 43300 mrsa, and staphylococcus aureus atcc 29213 mssa.There was no growth (b)(6) after 48 hours of incubation with both lots of chromid mrsa.Growth of both atcc strains was as expected for each strain and (b)(6) type.The investigation did not reproduce the customer (b)(6).This investigation concluded that performance of chromid mrsa agar reference 43451 lot 1004254660 is within specification and in accordance with the data indicated in the package insert.
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