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H.6 investigation summary: material 221716 is manufactured by rehydrating the media components with usp purified water, and thoroughly mixing until a homogeneous solution is obtained.The tubes are filled, capped, torqued, and then labeled by machine per standard operating procedure (sop).The tubes are terminally autoclaved in an air over pressure (aop) autoclave, per manufacturing instructions, using a validated cycle.Post autoclaving, tubes are packaged into final shipping configurations.The batch history record review for batch 2026705 was satisfactory and no quality notifications were generated during manufacturing and inspection.Formulation, filling, torqueing, and autoclaving processes were within specifications.Qc inspection and testing was satisfactory at time of release.Direct staining techniques are not part of qc release testing for this product.As part of the release criteria for this product, the bhr is reviewed to confirm the following: the total elapsed time between end of formulation and start of the autoclave cycle was within the specified limits.All autoclave parameters conformed to the validated cycle parameters for this product.The minimum f0 for this product was met.The complaint history was reviewed, and no other complaints have been taken on this batch for appearance.Retention samples from batch 2026705 (10 tubes) were available for inspection.No media defects such as turbid/contamination was observed in 10/10 retention samples.All retentions tubes had the expected appearance for material 221716 of light to medium light yellow, trace hazy to clear as specified in the certificate of analysis.For further investigation, two retention sample tubes were tested for contamination.One retention tube was incubated in the 20-25 degree c incubator, and one retention tube was placed in the 33-37 degree c incubator.At 7 days incubation, there were no signs of growth or turbidity from 2/2 incubated retention tubes.A gram stain was performed and no viable organisms were found.No photos were received to assist with the investigation.Returns were received to assist with the investigation.Bd carton number 0179 batch 2026705 was received bubble wrapped inside of a shipping box.There were 100/100 tubes from batch 2026705.There was no evidence of contamination or turbid media from visual inspection of 100/100 returned tubes.The media had the expected color and clarity of light to medium light yellow, trace hazy to clear as specified in the certificate of analysis.For further investigation, the return tubes 100/100 tubes were placed in the 33-37 degree c incubator.At 7 days incubation, there were no signs of growth or turbidity in 100/100 returned tubes.A gram stain was performed and no viable organisms were found.This complaint can be confirmed for non-viables.No actions are indicated at this time as no trends were observed for this defect.Bd will continue to trend complaints for appearance/non-viable organisms.Caution should be exercised in reporting direct gram stain and/or other direct microbiological stain results on tissue specimens processed with this medium due to the possible presence of nonviable organisms in the culture medium.Culture media sometimes contain dead organisms derived from medium constituents, which may be visible in smears of culture media.Other sources of dead organisms visible upon gram staining include staining reagents, immersion oil, glass slides, and the specimens used for inoculation.If there is uncertainty about the validity of the gram stain, the culture should be reincubated for another hour or two and the test repeated before a report is given.
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