Significance of the bacterial flora indigenous to man.
D001419:Bacteria / Q000276:immunology / Q000472:pathogenicity; D005075:Biological Evolution; D007109:Immunity; D007239:Infections; D007422:Intestines / Q000382:microbiology; D009055:Mouth / Q000382:microbiology; D013559:Symbiosis; D014815:Vitamins / Q000096:biosynthesis
D014815:Vitamins