PHA3801 Lecture Notes - Lecture 13: Tinea Nigra, Thymol, Astringent
24 Jul 2018
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Disinfection: aims to remove/destroy pathogenic microorganisms (no longer able to pass on an infection) dec # Prerequisite: should reliably disinfect in short-time, broad spectrum, well tolerated on skin, mucous membrane and wounds, not toxic after being absorbed, no bad odour, not being inactivated by wound exudates, body fluids, blood etc. Main uses: dec levels of microorganisms on the skin + mucous membrane (by dec # allows immune system to then take over). Normally, these membranes are host to a large number of usually harmless microorganisms. When skin or mucous membranes are damaged, antiseptics can be used to disinfect the area and dec chances of infection. Hand washing (chlorhexidine gluconate and povidone iodine solutions), pre-op skin disinfetion. Hydrogen peroxide (h2o2): short term action, broken to h2o + o2, 3% solution for wound disinfection. Organic disinfectant agents: alcohols (inc bactericidal potency methanol- propenol: need to contain water). K-permanganate (kmno4): oxidising agent w disinfectant, deodorising and astringent properties.
