NSE 12A/B Lecture Notes - Lecture 7: Personal Protective Equipment, Asepsis, Human Microbiota
Document Summary
At the end of this week the student will be able to: Immune response = protective rxn that neutralizes pathogens + repairs body cells: describe the role of normal flora as a defense against infection. Normal flora (nf) = microorganisms (mos) that reside on surface + in deep layers of skin, in saliva + oral mucosa, in gi + genitourinary tracts. The skin also has a large population of resident flora - nf which do not typically cause disease when residing in their usual area + participate in maintaining health. Large # of nf in large intestine (li): secrete anti-bacterial substances w/in intestine walls. Skin"s nf provide protective action by inhibiting mo growth (cid:3450) mouth + pharynx are also protected by similarly acting flora. Nf maintains sensitive balance w/ other mos to prevent infection (cid:3450) disrupting this balance (cid:3449) risk of acquiring infection.
