Development of a rapid method for the detection of Yersinia enterocolitica serotype O:8 from food.

In this study, a new and alternative method based on monoclonal antibodies (MAbs) for the rapid detection of Yersinia enterocolitica O:8 was developed. This microorganism is an emerging foodborne pathogen causing gastrointestinal disease in humans. The transmission can occur through contaminated food such as raw or undercooked meat, milk and dairy products, water and fresh vegetables. Nine MAbs (46F7, 54B11, 54C11, 62D10, 64C7, 64C10, 72E8, 72E10, 72G6) were characterized and selected versus Y. enterocolitica O:8, and only 2 of them showed also a weak cross-reaction with Campylobacter jejuni. The MAb 54B11 was used for the development of Y. enterocolitica capture-ELISA in food matrices, i.e. meat and dairy products (n = 132). The method was validated by ISO 16140:2003 and compared with the official method for the detection of presumptive pathogenic Y. enterocolitica (ISO 10273:2003). Relative accuracy, sensitivity and specificity corresponded to 100%. The selectivity was evaluated on other food samples (n = 126) showing a lower confidence limit of 90.3% and an upper confidence limit of 100%. The results from this study demonstrated that the developed method was rapid and cheap, specific and sensitive for the screening of the pathogen in food.