HiTouch™ Listeria Count Flexi Plate™

Principle And Interpretation

HiTouch Flexi Plates are specially developed for the microbial testing in food, pharmaceutical, cosmetic, dairy, hospitals, water works, environmental testing etc. These plates are handy and ready to use sterile media supplied in flexible disposable plates, 55 mm in diameter. It is grid scored on the base and is irradiated to ensure perfect sterility. Medium is filled aseptically and each plate is packed in pre-sterilized plastic bag. HiTouch Flexi Plate is then packed in plastic pouch wrapping. The unique flexible plate configuration ensures close contact even with uneven surfaces. Where not only counts are obtained but it is also possible to select and differentiate between groups of microorganisms like coliforms (both E. coli and non E. coli). These plates are specially developed for microbial testing, The Flexi plate medium formula is suitable for isolation of Listeria species and the grids enable direct reading on the plates of the number of colonies per cm2.

Listeria monocytogenes is the only species of the genus Listeria that is important as a human pathogen. Listeria seeligeri, Listeria welshimeri and Listeria ivanovii have been related with animal diseases. In any case, all the species are pathogenic between the ovine and bovine cattle. Positive diagnosis of listeriosis can be obtained only by the isolation and cultivation of the responsible bacteria from blood or CSF samples of the affected organisms. Listeria Oxford Medium Base is based on the formulation described by Curtis et al (1) for isolation of L. monocytogenes from clinical and food specimens.