Normal flora
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found abundantly on skin, mucosal surfaces of the upper respiratory tract and the GI tract (particularly the large intestine) and vagina
diverse bacterial and yeast species with preponderance of obligately anaerobic bacteria
absent in
lower respiratory tract (lung parenchyma/alveoli)
sterile bodily fluids: blood, CSF, bile, urine, pleural/peritoneal fluid
in certain circumstances, normal flora can cause disease
lung abscess, endocarditis, abdominal infections
Category: Microbiology Notes
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