Gram stain results for a staphylococcus, GPC in
pairs
chains
clusters
catalase test is a single enzyme test that breaks down hydrogen peroxide to water and oxygen
Micrococcus is a...
strict aerobe
strict anaerobe
facultative aerobe
facultative anaerobe
Staphylococcus is a...
strict anerobe
facultative anerobe
Staph aureus is found in 20% of peoples nose.
S. epidermidis is acquired through...
hospitals
schools
in washrooms
Which is a urinary pathogen?
s. epidermidis
s. aureus
s. saprophyticus
s. lugdunensis
what is acquired through blood cultures?
most pathogenic organism is...
S. aureus virulence factor
exotoxin
endotoxin
Exotoxins are released by the cell or when the cell is lysed
Leukocidins kill phagocytes
Enzymes promoting tissue destruction and spread
hyaluronidase
protease
lipase
lactase
Hyaluronidase...
spreads through connective tissue
targets lipids on the skin surface
has protein A to bind to IgG
Lipase...
has enzyme A
uses IgE
Latex agglutination positive =
Novobiocin...resistant =
coag neg staph
is staph going to grow on macconkey without crystal violet?
yes
no
staph aureus is...
alpha hemolytic
beta hemolytic
non hemolytic
has "stingy" colonies
s. lugdenensis
has a slightly "domed" center
Tube coagulase..
fibrongen -> fibrin
NADH -> NADPH
NAD -> NADH
clear zone around growth area on a DNAse plate means...
organism degrades DNA
organism cannot utilize DNA
Staph aureus is known as a bad boy
Staph aureus can ferment mannitol
Coag Neg can ferment mannitol
Coag Neg can grow in salt
Infections caused by S. Aureus includes...
Folliculitis
Boils
Impetigo
Scalded Skin Syndrome
Inflammation
Burning sensations
What is folliculitis?
infected hair vacuole
pus filled abscess
local redness
exfoliative toxin
What is a boil?
pus-filled abscess
infected hair follicle
burning sensation
osteomyelitis is...
invasion into bones
pus filled abscesses
infected follicles of the hair
