MCB 2000 Study Guide - Final Guide: Gonorrhea, Archaic Humans, Tooth Brushing

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The skin and its defenses: the skin, together with the hair, nails, and sweat and oil glands, forms the integument, antimicrobial peptides have been identified in epithelial cells. 5 distinct layers: keratin gives the cells their ability to withstand damage, abrasion, and water penetration; the surface of the skin is termed keratinized for this reason. Normal biota of the skin: must be capable of living in the dry, salty conditions of the skin, microbes grow in dense populations in moist areas and skin folds, such as the underarm and groin areas. It is (cid:272)o(cid:373)(cid:373)o(cid:374) fo(cid:396) a(cid:374) i(cid:374)di(cid:448)idual"s (cid:373)i(cid:272)(cid:396)o(cid:271)iota to (cid:396)e(cid:373)ai(cid:374) (cid:396)elati(cid:448)el(cid:455) (cid:272)o(cid:374)sta(cid:374)t o(cid:448)e(cid:396) ti(cid:373)e. Signs and symptoms: raised, red, tender, localized lesions (often featuring pus and feeling hot to the touch, lesions occur easily in breaks in the skin caused by injury, shaving, ect, fever. Transmission and epidemiology: found on fomites, direct/indirect contact.