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Important Information: LAB211

LAB211 (Half Fraser Broth Plus) LOT 203988 & 204017 Clarity Statement

With relation to product LAB211 LOT 203988 and 204017, these batches can present a slight precipitate causing the media to look slightly cloudy upon reconstitution and a fine white precipitate upon standing. The specification of LAB211 states that there should be no precipitate however the above lots present a slight precipitate due a reduced solubility of one of the media constituents, specifically the disodium hydrogen phosphate. Investigations carried out by Technical Services have shown that the specific batch of the phosphate component can present a minor precipitate when combined with the other phosphate component, potassium dihydrogen phosphate. The above lots have passed the bacteriological requirements of the internal QC test protocols, successfully recovering the test panel of organisms stated on the certificate of analysis and meet the require physical characteristics, specifically the pH of the prepared media. Whilst it is possible for these lots to present a precipitate, the performance of the media is unaffected and will still perform according to ISO 11133 and ISO 11290. As a corrective action all lots of phosphate will be pre-tested prior to use in LAB211 to prevent future issues.


Should you require any further information, please do not hesitate to contact Neogen Heywood Technical Services.
Yours sincerely,
Dr. Ez Elmerhebi
Technical Services Manager – Heywood

Article first published : 5/10/2018