H.6 investigation summary: this complaint is not confirmed.This complaint is for mis-identification of e.Coli atcc 35218 when using phoenix panel nmic/id-307 (449289) batch numbers 2285390 and 2249522.The customer did not provide lab reports but provided isolates and panel returns of batch 2285390 for the investigation.To investigate, five (5) retention samples of complaint batch 2285390 were inoculated with qc isolate e.Coli a35218 and evaluated in a phoenix m50 for identification results.Next, one (1) retention sample of complaint batch 2249522 were inoculated with qc isolate e.Coli a35218 and evaluated in a phoenix m50 for identification results.Then, one (1) customer returned panel of complaint batch 2285390 were inoculated with qc sample p.Aeruginosa 1a-1 and evaluated in a phoenix m50 for identification results.In addition, one (1) customer returned panel of complaint batch 2285390 were inoculated with qc sample p.Aeruginosa 1a-2 and evaluated in a phoenix m50 for identification results.Then, one (1) retention panel of complaint batch 2249522 were inoculated with qc sample p.Aeruginosa 1b-1 and evaluated in a phoenix m50 for identification results.Last, one (1) retention panel of complaint batch 2249522 were inoculated with qc sample p.Aeruginosa 1b-2 and evaluated in a phoenix m50 for identification results.All ten (10) panels identified their respective isolates accurately, therefore this complaint is not confirmed.A review of quality notifications revealed no quality notifications for the complaint batches.A review of complaints revealed one (1) additional complaint on complaint batch 2285390, which is related to this defect and no complaints on batch 2249522.Complaint trending was performed and no trends were identified associated with this defect.Bd id/ast plant quality will continue to monitor for trends and take action as necessary.Please continue to communicate any additional concerns.Bd encourages you to consider the following parameters to optimize results within your laboratory.Qc testing should only be performed on 2nd pass subcultures and avoid using colonies that have been sub-cultured multiple times isolated colonies are to be used for inoculation and carefully check purity plates to ensure the inoculum consisted of one isolate type optimum performance comes from using fresh 18-24 hour, well-isolated colonies ensure proper, sufficient inoculum density: allow bubbles to dissipate after vortexing, properly calibrate the bd phoenixspec¿ nephelometer with in-date mcfarland calibration standards, use swabs with minimal fiber shed, make the proper inoculum density for the inoculum system setting (i.E., if preparing a 0.25 mcfarland inoculum, ensure that the system is set to 0.5 inoculum mode).Volume of id broth should be visually assessed for any obvious low fills.Ensure proper incubation temperature and environment.Use the correct media type as listed as acceptable for use in the user¿s manual (note - it is helpful to disclose the media type and vendor when providing the details of the complaint).Handle panels by only touching the sides; touching the front or back of the panels may cause interference in the readings and lead to errors.Follow user¿s manual instructions for time limits on pouring inoculated id broth into the panel and placing the panel into the instrument; extended periods of time outside of the stated limitations may yield errors.
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