Samples are separated in DNA (metagenome) and RNA (metatranscriptome) folders. First number in the file name correspond to patient number. Second number after dot correspond to visit. Example: DNA_8.1_R1_Progressing_sites, are the DNA sequences from patient 8 at the first visit (baseline). Visits' codes: .1 = Baseline .2 = 2 months visit .3 = 4 months visit Reference Yost S, Duran-Pinedo AE, Teles R, Krishnan K, Frias-Lopez J. 2015. Functional signatures of oral dysbiosis during periodontitis progression revealed by microbial metatranscriptome analysis. Genome Med. In press.