امتیاز کاربران

Part of normal body flora, colony morphology: opaque, round, buttery, golden

yellow, convex, beta hemolytic, ferments manitol salt agar, small variant colonys

may appear after antibiotic treatment, coagulase pos, DNase, thermonuclease pos.

diseases: impetigo, toxic shock syndrome, food poisoning, pneumonia,

meningitis, colonizes medical equipment (IV, catheters), Methicillin resistant

staph arueus: nosocomial infections.

creamy white, beta hemolytic colonies typical of Staphylococcus aureus

Opaque:مات

Buttery: روغنی

Convex: محدب

Staphylococcus aureus virulence factors

a)    Alpha hemolysin: lyses RBC, skin cell death, nerve damage

b)    Beta hemolysin: lyses RBC

c)     Gamma hemolysin: lyses RBC, neurtrophils, macrophages

d)    Delta hemolysin: lyses RBC, cell membranes

e)    Toxic shock syndrome toxin 1: fever, t lymph proliferation, lethal effect of endotoxin

f)     Staph enterotoxins: vomiting, t-lymph proliferation, fever

g)    Leukocidin: lyses neutrophils and macrophages

h)    Exfoliative toxins: shedding of epidermis, t-lymph proliferation

gram stained of Staphylococcus aureus