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    Bacillus anthracis bacteria — Stock Photo
    Bacillus anthracis bacteria
    Porphyromonas gingivalis oral bacterium, 360 degree panorama view computer illustration. P. gingivalis (formerly known as Bacteroides gingivalis) is part of the normal flora of the mouth, intestine and urogenital tract — Stock Photo
    Porphyromonas gingivalis oral bacterium, 360 degree panorama view computer illustration. P. gingivalis (formerly known as Bacteroides gingivalis) is part of the normal flora of the mouth, intestine and urogenital tract
    Bacteria forming strands and colonies — Stock Photo
    Bacteria forming strands and colonies
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin