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Category: Culture Media

link to Columbia CNA Agar: Composition, Uses, and Results

Columbia CNA Agar: Composition, Uses, and Results

Columbia agar with colistin and nalidixic acid (CNA) is a selective and differential medium for isolating and differentiating pathogenic gram-positive cocci from clinical and non-clinical samples....

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link to Bacteriological Agar: Properties and Uses

Bacteriological Agar: Properties and Uses

Agar (agar agar) is a thermoreversible gelling agent extracted from the cell walls of smaller seaweeds (red algae). Agar is obtained from red algae belonging to the genera Gracilaria, Ahnfeltia,...

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link to Best Practices for Preparation of Culture Media

Best Practices for Preparation of Culture Media

Culture media are fundamental in diagnostic microbiology. Nearly all media are commercially available as ready-to-use agar plates or tubes of broth. Laboratories in high-income countries procure...

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link to Lysine Iron Agar (LIA): Principle, Composition, Results, and Uses

Lysine Iron Agar (LIA): Principle, Composition, Results, and Uses

Lysine Iron Agar (LIA) is a combination medium used for the differentiation of gram-negative bacilli (enterics) based on decarboxylation or deamination of lysine and the formation of hydrogen sulfide...

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link to Czapek Dox Agar: Principle, Composition, Colony Characteristics

Czapek Dox Agar: Principle, Composition, Colony Characteristics

Czapek medium is also called Czapek’s agar (CZA) or Czapek-Dox medium. Czapek agar is named after the Friedrich Johann Franz Czapek. He invented this medium and was later modified by Arthur Wayland...

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link to Phenylethyl Alcohol Agar: Composition, Preparation, Uses

Phenylethyl Alcohol Agar: Composition, Preparation, Uses

Phenylethyl alcohol agar (PEA) is a selective medium used to cultivate Gram-positive organisms, particularly cocci, from a sample containing a mixture of pathogens. The active ingredient, phenylethyl...

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