AGAR MEDIUM TO DEFINE ACID PRODUCING BACTERIA

Improved medium for detecting deoxyribonuclease-producing bacteria.

Incorporation of methyl green dye into an agar medium containing deoxyribo-nucleic acid results in an improved medium for detecting deoxyribonuclease-producing bacteria. Use of the dye makes it unnecessary to use acid to demonstrate deoxyribonuclease activity, thus allowing subculture or reincubation of colonies. The improved medium is highly sensitive and can be used for primary isolation of S...

Acid Fuchsin Methylene Blue Agar: a New Differential Medium for Enteric Bacteria.

Despite the development of successful selective media favoring the more pathogenic members of the Enterobacteriaceae, media of primarily differential nature have not been entirely satisfactory for several reasons, such as the following: (1) Generally only colonies of lactose fermenters are colored, whereas the colorless colonies of nonfermenters tend to be masked by the diffusion of dye from fe...

Antimicrobial microbes-bacteriocin producing lactic acid bacteria

The contribution of lactic acid bacteria (LAB) to the improvement of food safety and stability of fermented foods has long been known. LAB overgrow other microorganisms of the same ecological niche in food products mainly due to lowering the pH, competing for nutrients, producing various antimicrobial substances such as organic acids, hydrogen peroxide, antibiotics and bacteriocins. Among these...

Evaluation of a chromogenic agar medium for the detection of extended-spectrum ß-lactamase-producing Enterobacteriaceae.

AIM To compare the performance of a new chromogenic agar medium CHROMagar ESBL (KC-ESBL) to chromID ESBL (SB-ESBL) for the detection and presumptive identification of extended-spectrum ß-lactamase (ESBL)-producing Enterobacteriaceae directly from clinical specimens. METHODS AND RESULTS A total of 256 specimens were screened for ESBL producers. Also, the genotypes of the ESBLs and plasmid-medi...

Studies of Agar-digesting Bacteria.