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Phylogenetic tree of S1, S5, S12 and S14 strains based on 16S rDNA sequences. a. PCR results. b. The ratio of each strain in the samples. c. The phylogenetic tree based on the 16S rDNA sequences. Reference sequences were obtained from the GenBank nucleotide sequence database (NCBI), including KR066436.1, EF097420.1.1396, DQ824024.1, KX519704.1, GQ853416.1, DQ014606.1, EU791061.1, EF096774.1, AB934477.1, GU295951.1, AB702765.1, DI343235.1, DQ808601.1
