Microorganisms and Disease
Mucus helps in protecting against pathogens by

lowering the pH
sequestering Iron
facilitating the growth of normal flora
blocking access and attachment of pathogens to mucosal surfaces

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Microorganisms and Disease
What is common in catheters and ventilators?

They are used primarily in neonatal intensive care units
They bypass important defenses of the body
Bacteria responsible for associated infections are usually susceptible to antibiotics
They predispose patients to viral rather than bacterial infections

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