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词汇 Acid fast
分类 英语词汇 英语翻译词典
释义

Acid fast

原声例句
Osmosis-微生物

Because of this waxy cell wall, they're acid fast, meaning that it can hold on to a dye in spite of being exposed to alcohol, leaving in a bright red color, when as Ziehl-Neelsen stain is used.

由于这层蜡样细胞壁结构,结核分枝杆菌是一种耐酸的病原菌,这就意味着它可以在酒精中存活,我们通常会用齐-尼氏抗酸染色法来使细胞壁变为红色。

英语百科

Acid-fast

Mycobacterium tuberculosis (stained red) in tissue (blue).

Acid-fastness is a physical property of certain bacteria (and, less commonly, protozoa), specifically their resistance to decolorization by acids during staining procedures.

Acid-fast organisms are easy to characterize using standard microbiological techniques (e.g. Gram stain - if an acid-fast bacillus (AFB) was gram stained, the result would be an abnormal gram positive organism, which would indicate that further testing wasn't necessary), though they can be stained using concentrated dyes, particularly when the staining process is combined with heat. Once stained, these organisms resist the dilute acid and/or ethanol-based de-colorization procedures common in many staining protocols, hence the name acid-fast.

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