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OTHER NON-SPECIFIC FACTORS: 1. Physical Barriers: Skin and mucous membranes, mucous, ciliary ladder, coughing , sneezing, diarrhea, peristalsis, Bony encasements eg. skull, ear wax and other secretions. 2. Chemical Barriers: pH of the skin, urogenital tract, in males length of the urethra prevents UTI's, females not as lucky. pH of earwax about 4, or female urogenital system about 4---secretion of glycogen in mucous with hydrolysis and fermentation by lactobacilli keep pH down. Disruption may result in yeast infections. Transferrin binds iron at the first sign of an infection. For many organisms the result is too little iron for growth. In semen there is spermine, in tears lysozyme, often clots form due to infection to wall off the invader. There are also some white blood cells and macrophages which eat anything (non-specific) others are specific and only eat things tagged with antibody.
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Unformatted text preview: SYNERGISTIC GAS GANGRENE Communicable and Non-Communicable Diseases: Classify these: TB, Influenza, Measles, Tetanus, Appendicitis, botulism. Communicable diseases: can be sporadic, endemic, or epidemic. Epidemiologists study communicable disease incidence and prevalence. Prevalence is the proportion of people in a population with a disease. Incidence is the amount of people with the disease. Epidemiology studies why and how people within populations get a disease and how the disease progresses through the population. They study ways to stem a disease so that it affects fewer people and try to stop it. The Communicable Disease Center in Atlanta studies epidemiology and reports every week on the state of health and the progress of various diseases across the United states. Would you like to read the weely issue? Click here for a copy of this week's. Free subscriptions too at:...
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