Micro 04-09-08 - Whitney Barter Ch. 21 R 1-4, 6, 11-14...

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Whitney Barter Ch. 21 – R 1-4, 6, 11-14 4/14/08 1. Discuss the usual mode of entry of bacteria into the skin. Compare bacterial skin infections with those caused by fungi and viruses with respect to mode of entry. Bacteria usually enter through inapparent openings in the skin. Fungal pathogens (except subcutaneous) often grow on the skin itself. Viral infection of the skin (except warts and herpes simplex) most often gain access to the body through the respirator tract. 2. What bacteria are identified by a positive coagulase test? What bacteria are characterized as group A beta-hemolytic? Staphylococcus aureus is identified by a positive coagulase test. Streptococcus pyogenes is characterized as group A beta-hemolytic. 3. Compare and contrast impetigo and erysipelas. Impetigo – caused by Staphylococcus aureus , the symptoms are vesicles that rupture and crust over, the treatment is hexachlorophene and it may be epidemic. Erysipelas –
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Micro 04-09-08 - Whitney Barter Ch. 21 R 1-4, 6, 11-14...

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