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,...
Category: 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...
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...
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...
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...
Tinsdale agar base medium was developed by Tinsdale for the selective isolation and differentiation of C. diphtheriae from diphtheroids. Billings later modified the medium improving its differential...
