QC is 10% science and 90% detective work. Sarah performed a Gram stain. The colony was pink (Gram-negative rods). She ran an Oxidase test. It turned blue. She loaded the VITEK 2 machine.
The Unseen Guardians Subtitle: A Story of Quality Control in Microbiology quality control in microbiology slideshare
“Come on,” she whispered. “Who are you?” QC is 10% science and 90% detective work
At 4:00 AM, the result printed. Ralstonia pickettii . A water bug. Not a killer, but a liar . She ran an Oxidase test
Her phone rang. It was the Production Manager. “Ship the batch. We’re behind quota.”
Sarah looked at the colony. She looked at the QC protocol. She knew the story she was about to live.
The QC data showed the truth: The batch was sterile. The contamination was in the water purification system used for the QC test itself .