MICR 221 Lecture Notes - Lecture 22: Fomite, Streptococcus Mutans, Staphylococcus Epidermidis
24 Apr 2018
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Native= normally found in body introduced= suddenly arrive. Nose- mucous, staphylococcus aureus (leading cause of bacterial disease in human) kept under control by staphylococcus epidermis which forms biofilm but can become pathogenic in wound infection, bacteremia, otitis. Mouth: 10^10 organisms, controlled by ph, saliva, temp, immune sys, prevotella sp. have natural antibiotic resistance attach to epithelial cells and cause large infection, streptococcus mutans cause dental cavities, candida albicans yeast causes oral infection called thrush. Skin: 2m2 of skin supports 1o12 bacteria, microbes recolonize after washing, controlled by acidic sweat and antimicrobial peptides, malassezia spp causes black skin instead of pink in dogs. Git: 1014 flora, not susceptible to many antiobiotics, clostridium difficile creates inflammatory plaques painful and hard to quarantine, e coli in si cause infection, Secrete + synthesize vit like k and b12 form enteric bacteria. Prevent colonization by pathognes- body already saturated in bacteria. Prevent infection- prolonged use of antibiotics causes imabalnce ex. candida albicans.
