F
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 68 of 92
For the most current and official copy, check QMiS.
Laminar Flow Hood (LFH) with an air classification at the same
rating or better than that from which the swab was collected.
2. All surfaces within the BSC or LFH must be thoroughly disinfected
with a sporicidal disinfectant followed by filter sterile 70% ethanol or
IPA prior to placing swabs under the hood and beginning analysis.
3. In order to assure that the BSC/LFH and media are free of microbial
contamination, standard open and closed controls used for sterility
testing should be performed concurrently with analysis.
4. Don as appropriate the following PPE:
a. Hair net
b. Disposable lab coat
c. Sterile disposable sleeves
d. Sterile gloves
e. Mask/beard covers
f. Lab Safety Glasses
5. Sterile gloves must be decontaminated between the processing of
each individual swab. Sterile gloves and sleeves should be
discarded and replaced as needed.
6. Sample Preparation
a. Examine swab containers for closure integrity to ensure
tampering, leakage, or potential cross contamination has not
occurred.
b. Carefully disinfect exterior of each swab container and place into
the sanitized BSC/LFH and allow to air dry.
7. Media Selection
a. Neutralizing additives (i.e. Tween/Polysorbate, Lecithin, etc.) are
utilized to neutralize inhibitory disinfectant residues transferred to
the swab during sampling that might inhibit microbial growth.
b. For a broad-spectrum recovery of microorganisms, utilize a
nutrient rich general-purpose media containing neutralizers (i.e.
MLB, MLA, etc.).
c. When targeting fungal populations only, it is necessary to use an
appropriate fungal media such as Sabouraud Dextrose or Malt
Extract media. It is beneficial to use an antibiotic (i.e.
Chlortetracycline) which will help to selectively inhibit bacterial
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