SPECIES DIVERSITY OF LACTIC ACID BACTERIA FROM CHILLED COOKED MEAT PRODUCTS AT EXPIRATION DATE IN BELGIAN RETAIL Wim Geeraerts1, Vasileios Pothakos1, Luc De Vuyst1 and Frédéric Leroy1 1 Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
[email protected] Abstract – The bacterial communities of a wide (e.g., salt) and additives (e.g., sodium lactate). variety of chilled cooked meat products (29 different However, current practices often intend to reduce products), originating from pork and poultry, were the amount of salt and additives in view of subjected to extensive sampling. Samples were increasingly stringent consumer demands [1]. As a stored at 4 °C and analyzed at expiration date. result of the typical conditions prevailing in the Bacterial isolates were obtained from MRS agar, packaged and chilled cooked meat products, modified MRS agar, and M17 agar. Next, a specific microbiota develop. Usually, these procedure consisting of (GTG)5-PCR fingerprinting of genomic DNA followed by numerical clustering microbiota mostly consist of psychrophilic and was performed and for each cluster the identity of a psychrotolerant lactic acid bacteria (LAB), in selection of representative isolates was determined particular species of the genera Carnobacterium, by sequencing of the 16S rRNA gene. Based on the Enterococcus, Lactobacillus, and Leuconostoc [2- preliminary results, seven lactic acid bacterium 5]. Some of these LAB have only moderate effects (LAB) species were retrieved and belonged to the on the sensory status, whereas others have a clear following genera: Carnobacterium, Leuconostoc, ability to cause spoilage, including slime Lactobacillus, and Vagococcus.