3.2.2 Food preparation and arrangements for the infection
first. Brain Heart Infusion Broth (BHI Broth) is used to test for MIC and Active infection
Formula 1 liter of culture medium containing
Brain Heart Infusion 37 g / l
distilled water and 1000 g / l
Mix well and pour into a test tube. Then the steam sterilization by steam autoclave at 121 ° c 15 minutes
2. Brain Heart Infusion Agar (BHI Agar) is used for the test. MBC
formula agar volume of one liter contains
Brain Heart Infusion Agar 37 g / l
distilled water and 1000 g / l
Mix well, stirring until gelatin dissolves, pour into bottles and then to steam sterilization by autoclave steam. 121 ° c 15 minutes
3. Thioglycollate broth Enrichment for infection received from the Department of Medical Sciences
formula agar containing 1 liter
Casein hydrolyzate Enzymic 15.0 G / L
Yeast Extract 5.0 G / L
Dextrose 5.5 G / L
Sodium chloride 2.5. G / L
L-Cystine 0.5 G / L
Sodium Thioglycollate 0.5 G / L
Resazurin 0.001 G / L
agar 0.75 G / L
water 1000 G / L
pH 7.1 ± 0.2
, mix well, stirring until gelatin dissolves. Pour into a test tube and then steam sterilized by steam autoclave at 121 ° c 15 minutes
5. Preparation of bacteria
P. acnes, the bacteria leading 5.1 in gelatin to dissolve the gelatin until dissolved, then bring Thioglycollate Broth. BHI Agar point to a 48-hour incubation in anaerobic bacteria, temperature 35-37 ° c 5.2 brings the food to feed the BHI Agar Active in BHI broth 48 hours
in anaerobic conditions, temperature 35-37 ° c.
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