Among them, the metastatic group specimens only contain Shigella , Staphylococcus aureus , and Neisseria gonorrhoeae , and the number of Gram-negative bacteria in cancer patient samples shows an increasing trend ( 61 ).
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Cross-disciplinary communication between oral and gut microbiota in head and neck cancer.
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For instance, the abundance of Bacteroidetes (mainly Prevotella ) and Veillonella tends to increase with age, whereas bacteria such as Granulicatella show a decreasing trend ( 4 ).