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

Contact our specialist

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

Send request

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.