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Medical Micro

Important Info.

Prevalence Portion of persons infected in a population at a given time
Incidence number of new infections per unit time
Endemic usual presence of disease in a population
Pandemic world-wide epidemic of disease
Index Case the case serving as the source of infection (Thyphoid Mary)
Incubation Period time between exposure amd evidence of symptoms
Zoonosis infection naturally transmitted from animals to man
clinical diagnosis indentification of disease by observing it
Epidemic number of cases per time exceeds endemic rate
coccobacilli between rod and cocci
vibrio comma shaped
filamentous "stringy" long
fusiform short elongated
strept cocci in chains
staph cocci in clusters
diplo cocci in pairs
faculatative anaerobes can use oxygen for respiration; prefer anaerobic environments
obligate anaerobes can't grow in the presence of oxygen
cell wall specializations capsule, flagella, pili(fimbriae),glycocalex,exotoxins,endospores
gram positive bacteria thick peptidoglycan, teichoic acid outside, stain:purple
gram negative bacteria thin peptidoglycan, periplamic space between 2 layers, stain:pink
Acid-Fast bacteria lack cell wall, resist gram-stain, respond to carbofuchsin, only a cell membrane, bacteria:mycobacterium, mycoplasm
growth stages lag, log, stationary, death
changes in temp psycrophiles, mesophiles, thermophiles
psycrophiles <5*C
mesophiles 20-40*C (human body range)
thermophiles >45*C
Staphylococcus S. Aureus, S. Saprophyticus, S. Epidermidis
S. Aureus -normal flora of our skin/ area around nose -coagulase positive skin infections: impetigo, folliculitis, abscesses -mamitol-salt agar
S. Saprophyticus -coagulase neg. -main cause of urinary tract infections in young, sexually active females
S. Epidemidis -normal flora of our skin -coagulase negative - can cause endocarditis
Created by: Necole



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