Animal Bifidobacterium lactis subspecies|134318 |BNCC

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Bifidobacterium animalis subsp. lactis

Culture medium	BNCC352254
Description	BBL agar medium
Composition	Peptone:15.0g, Glucose:20.0g, Yeast Extract Powder:2.0g, Soluble Starch:0.5g, NaCl:5.0g, L-Cysteine:0.5g, Tomato Infusion Powder:5.0g, Liver Infusion Powder:2.0g, Tween 80:1.0mL, Agar:20.0g, pH:7.0±0.1(25℃)
Growth conditions	37 ℃; 24-48 hours; anaerobic
Subculture procedure	①Prepare 1-2 fresh agar plates (placed in an anaerobic environment for 24 hours of deoxygenation) with typical bacterial colonies; ② Open the safety cabinet, burn the top with an alcohol lamp, quickly drip sterile water to break it, and then use tweezers to crush it; ③ Take 0.5mL of liquid culture medium or sterile water (placed in an anaerobic environment for 24 hours of deoxygenation in advance) and transfer it into a freeze-drying tube. Dissolve it thoroughly and mix well; ④ Transfer 0.2mL of bacterial suspension into a Agar plate, apply evenly, and repeat twice to obtain two plates; ⑤ Cultivate under the above conditions, and the strain can be used once it grows.
Storage conditions	2-8 ℃
Safety level	1
morphology	Colonies were 1-2 mm in diameter, circular with an entire margin, and opaque. The colonies appeared creamy-white, convex in elevation, with a smooth, glistening, and moist surface that was easily liftable. No soluble pigment was produced. Microscopic examination revealed Gram-positive (blue-violet), rod-shaped cells. The culture was pure.
Sharing mode	Public welfare sharing