Abstract: The present invention relates to novel strains of Lactiplantibacillus plantarum as well as preparations and compositions, such as fermentation broths, protective cultures, final food or feed products comprising a strain of the species Lacticaseibacillus rhamnosus in combination with a strain of the species Lactiplantibacillus plantarum. The present invention further relates to methods for the controlling of growth of a contaminant, such as yeast or mould by using these novel strains and combinations.

Abstract: A nucleic acid aptamer comprising the nucleotide sequence shown herein as SEQ ID No. 5, 6, 7, 8, 9, 10, 1, 2, 3 or 4 or a fragment thereof or a sequence which is at least 80% identical therewith and use of nucleic aptamers to detect the presence of pathogenic bacteria in a sample, particularly in a complex matrix—such as a food system.