New agar detects Lactose positive Salmonella
The recent revision of ISO 6579 for Salmonella testing is a result of the growing incidence of Lactose positve Salmonella spp. isolated from cases of food poisoning.
Traditionally Salmonella are considered to be non-lactose fermenting organisms - however a small but important number of this highly diverse group are capable of lactose fermentation & may be incorrectly identified or missed altogether by conventional Salmonella selective media.
CHROMagar Salmonella Plus agar has been introduced to meet the requirements of ISO 6579 & provides clear, easilly visible identification of Salmonealla spp. including lactose positve Salmonellae, S.typhi and S.paratyphi.
The newly revised International Standard ISO 6579 for the detection of Salmonella spp. applies to all types of food and feed marketed for human and animal consumption as well as environmental samples taken from food production and handling areas.
A new requirement introduced with the revision of ISO 6579 is that tests must now be capable of detecting lactose positive strains of Salmonella as well as non-lactose fermenters.
Traditional Salmonella selective fermentation media, along with most chromogenic media were developed to detect the majority of Salmonella spp. - normally incapable of lactose fermentation. The last decade has however seen an increase in the occurrence of lactose positive strains of Salmonlla implicated in outbreaks of food poisoning.
The new chromogeninc agar, CHROMagar Salmonlla Plus from CHROMagar, Paris is designed to meet the requirments of ISO 6579 and provide clear,simple & distinctive detection of both lactose negative and lactose positive Salmonlla spp.
Salmonella give rise to distinctively coloured Mauve colonies, E.coli colonies remain colourless whilst other coliform colonies are blue. Results are developed within 24 hours, with stable colours which are clearly visible under normal lighting conditions.
For full product details and specification contact: info@m-techdiagnostics.ltd.uk
NEW CHROMagar VRE agar
