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認証
ISO 21871
品質水準
無菌性
non-sterile; Not processed or packaged aseptically
形状
medium granules
メーカー／製品名
GranuCult®
pH範囲
7.0 - 7.4 (25 °C)
アプリケーション
food and beverages
pathogen testing
保管温度
15-25°C
適合性
selective and differential for bacteria: Bacillus Cereus
詳細
GranuCult® PEMBA agar is a selective culture medium containing two indicator systems, mannitol and bromothymol blue, and egg yolk. B. cereus does not utilize mannitol and forms precipitates of hydrolyzed lecithin from the egg yolk.
B. cereus grow as turquoise to peacock blue colonies, since the medium is slightly alkalized by its metabolites (bromothymol blue reaction). The yolk reaction (by lecithinase) also leads to a precipitate surrounding the colony, which appears in the color of the agar or similar to the colony. Growth and lecithinase activity are often so strong that the precipitation is already evident before a colony is visible.
Bacillus cereus is identified by colony morphology, color, and egg yolk hydrolysis. Microscopic examination of the cell and spore morphology and the formation of intracellular lipid globules in vegetative cells is a rapid method of confirmation.
Mannitol-positive bacteria form yellow colonies with a yellow zone in the surrounding medium.
B. cereus grow as turquoise to peacock blue colonies, since the medium is slightly alkalized by its metabolites (bromothymol blue reaction). The yolk reaction (by lecithinase) also leads to a precipitate surrounding the colony, which appears in the color of the agar or similar to the colony. Growth and lecithinase activity are often so strong that the precipitation is already evident before a colony is visible.
Bacillus cereus is identified by colony morphology, color, and egg yolk hydrolysis. Microscopic examination of the cell and spore morphology and the formation of intracellular lipid globules in vegetative cells is a rapid method of confirmation.
Mannitol-positive bacteria form yellow colonies with a yellow zone in the surrounding medium.
アプリケーション
GranuCult® PEMBA agar is used for the selective isolation of viable presumptive Bacillus cereus from Food products and animal feeds and the environmental samples in the area of food production and food handling.
原理
Low concentration of nutrients and the selective inhibitory component polymyxin help to attain selectivity. Although, some Proteus spp. and Gram-positive cocci also grow in the medium. The low peptone level and the addition of the pyruvate improve the egg yolk precipitation and sporulation. Bromothymol blue acts as a pH indicator to detect mannitol utilization. Enzymatic digest of casein provides carbon and nitrogen sources. Sodium chloride maintains the osmotic balance of the medium, while agar is the solidifying agent.
脚注
We offer two media types: the superior granulated GranuCult® and the cost-efficient powdered NutriSelect® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.
法的情報
GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany
NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany
シグナルワード
Warning
危険有害性情報
危険有害性の分類
Eye Irrit. 2 - Skin Sens. 1
保管分類コード
11 - Combustible Solids
WGK
WGK 2
試験成績書（COA）
製品のロット番号・バッチ番号を入力して、試験成績書（COA） を検索できます。ロット番号・バッチ番号は、製品ラベルに「Lot」または「Batch」に続いて記載されています。
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