H6 investigation summary: catalog 442022 batch no.2013115 customer reported a false positive result.Neither photos nor returned good samples were received.The plus anaerobic/f epi plot showed low voltages prior to the positive detection.Very low voltages will cause false positives with anaerobic media.Product support recommends an fse evaluate the racks and/or leds.Upon further evaluation it was noticed that complaint received was from a product already expired.Investigation cannot be conducted to the retention samples since the product is already expired.A complaint history review was conducted and only the current complaint was found relating to the incident lot number and the ¿as reported¿ defect code.The batch history record was not reviewed as the lot is expired, nonetheless batch history records are always reviewed prior to product release.Users are cautioned in the package insert under limitation of the procedure: ¿a gram-stained smear from culture medium may contain small number of non-viable organisms derived from media constituents, staining reagents, immersion oil, glass slide and specimens used for inoculation.There are many factors that can influence the false positive rate, including blood volume, blood cell counts, environmental factors, and media lot to lot variations.Complaint is unconfirmed.No correctives actions were required.A cross functional team continually monitors all product complaints for trends and determines if any additional actions are necessary beyond the current investigation process.
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