Pharmaceutical Microbiology Manual
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ORA.007 Pharmaceutical Microbiology Manual
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- Revised: 25 Aug 2020 Title: Pharmaceutical Microbiology Manual
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OOD AND D RUG A DMINISTRATION O FFICE OF R EGULATORY A FFAIRS Office of Regulatory Science Document Number: ORA.007 Revision #: 02 Revised: 25 Aug 2020 Title: Pharmaceutical Microbiology Manual Page 69 of 92 For the most current and official copy, check QMiS. growth and restrict the size and height of colonies of more rapidly growing molds. d. TSA w/5% Sheep Blood Agar is beneficial for cultivating fastidious microorganisms. e. MacConkey Agar is used for the isolation and differentiation of Gram negative and enteric organisms. f. RODAC plates and Hycheck slides are used for the detection and quantification of microbiological contamination. F. Analytical Procedure 1. Approximately 100 ml of sterile media, MLB or other suitable media, should be aseptically added to each plastic bag containing a square sponge swab. Mix or swirl thoroughly. 2. Approximately 10 ml of sterile media, MLB or other suitable media, should be aseptically added to a sterile container to which the swab and its transport media are added. Mix or swirl thoroughly. 3. All swabs are incubated at 25ºC- 30ºC for at least 14 days to allow for the resuscitation of potentially stressed microbes. 4. Hycheck slides and RODAC plates should promptly be incubated at 30-35ºC for 2 days and then 20 ºC -25 ºC for 5 days. Longer incubation times may be required when contaminants are suspected to be slow growing. Check plates daily for colony formation to minimize obscuring visualization of smaller colonies by over growth. a. Count and record the number of colony forming units for RODAC plates. A representative of each colony type should be picked and re-streaked for purity and subsequently identified. b. Count the number of colonies on both sides of the paddle for the Hycheck slide. Report the colony counts for each side of the paddle and a representative of each all colony type should be picked and re-streaked for purity and subsequently identified. 5. Check all swabs/sponges daily for turbidity and subculture for isolation as turbidity is observed. All subculturing must be performed under LFH or BSC. If container does not allow for turbidity observation to be made, then subculture all environmental samples between Day 5 and 7. All environmental samples will be subcultured following day 14 incubation regardless of previous subculturing. |
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