title: Metataxonomics:dairies:Brazil
design: For HTS, the 90 samples were grouped and pooled into four categories, to achieve at least 5 ng/l of total DNA for 16S Metagenomic Sequencing Library Preparation, according to Illumina (San Diego, USA). Table 1 shows the number of samples included in each category, comprising 12 raw material (group A - raw milk, pasteurized milk, brine), 29 final products (group B - soft and semi-hard cheeses), 27 food-contact surfaces (group C - shelves and worker gloves) and 22 non-food contact surfaces (group D - sink, drain, floors and staffs boot).