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Infection control
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Body Defenses Against Microorganisms/Germs

 External natural defenses

 Skin as mechanical barrier

 Mucous membrane

 Cilia – fine microscopic hairs in nose

 Coughing and sneezing

 Hydrochloric acid in stomach

 Tears

 Internal natural defenses

 Phagocytes

 Inflammation

Spread of Microorganisms

 Direct contact: transmitted directly from one

person to another

 Indirect contact: transferred from one object to another

How Microorganisms Spread

 Airborne: carried in the air

 Oral route: enters body through water, food dirty

hands

 Insects and Pests: picked up on insects and pests

and transferred

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