Vogel and Johnson Agar

Productcode: NCM0282A
Supplier: Neogen Europe ltd
Package size: 500 g

Product information

Vogel and Johnson Agar is used for the isolation of staphylococci. Coagulase-positive staphylococci, primarily Staphylococcus aureus, are among the microorganisms that cause spoilage or chemical changes in cosmetic products. To isolate coagulase-positive, mannitol fermenting staphylococci, Vogel and Johnson modified Tellurite-Glycine Agar by Zebovitz, Evans, and Niven. The modification included increasing mannitol and adding a pH indicator. Vogel and Johnson Agar selects and differentiates coagulase-positive staphylococci that ferment mannitol and reduce tellurite

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For more information from Labema’s specialist. The specialist for this product is Iiris Ylöstalo.

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Keywords

Microbiological Culture Dry Culture Media and Supplements Neogen Europe ltd

Researchs

Evaluation of Chromogenic Media for Detection of Methicillin-Resistant Staphylococcus aureus

Five chromogenic media were evaluated and compared for the potential for MRSA detection: Brilliance MRSA agar (Oxoid), ChromID (bioMérieux), MRSASelect (Bio-Rad), CHROMagar (CHROMagar Microbiology), and BBL-CHROMagar (BD Diagnostics). Randomized samples were spiral plated on each medium and independently scored by five investigators for characteristic colonies at 24 and 48 h of incubation. For an arbitrary MRSA prevalence of 5% and based on patient sample evaluations, the positive predictive values for BBL-CHROMagar and CHROMagar (about 84%) were the highest. The negative predictive values of all of the media were >92% for MRSA prevalences ranging from 5% to 30%. In conclusion, BBL-CHROMagar and CHROMagar gave the best overall results for detection of MRSA, irrespective of the sample concentration, investigator, or incubation period.

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