MUST KNOW Flashcards
fever producing and flesh-eating bacteria
Streptococcus pyogenes
serological test to detect recent infections with S. pyogenes
Anti-streptolysin O
<200 Todd units/mL (+)
solubilizes the ground substance of mammalian tissues
hyaluronidase
oxygen stable, non-antigenic hemolysin responsible for the SURFACE hemolysis on BAP
streptolysin S
principal virulence factor of group A strep
protein M
oxygen-labile, antigenic hemolysin responsible for the SUBSURFACE hemolysis on BAP
streptolysin O
what binds to plasminogen to activate plasmin?
streptokinase
degrades proteins and mediated rashes caused by scarlet fever
Exotoxin B (cysteine protease)
how to diagnose strep throat?
throat swab (culture) or direct antigen detection
symptom of scarlet fever
strawberry colored tongue
susceptibility test for scarlet fever and positive result
Dick’s test (erythrogenic toxin test)
(+) erythema or redness of skin
confirmatory test for scarlet fever and its positive result
Schultz-charlton (anti-erythrogenic toxin test)
(+) blanching phenomenon
T or F.
cellulitis is a noncommunicable infection of subcutaneous skin tissue characterized by redness and edema
F.
cellulitis is CONTAGIOUS
acute infection of the dermal layer of the skin with swollen reddish spots
erysipelas
a complication of pharyngitis
rheumatic heart fever
may lead to necrotizing fasciitis, also known as galloping gangrene or flesh eating bacteria
impetigo
also known as bright’s disease; inflammatory disease of the renal glomeruli
acute glomerulonephritis
Differentiates S. pyogenes from other beta hemolytic; Helpful for identifying group A in throat culture, and; Groups C and G are also susceptible
Bacitracin Disk Test (0.04 units) or Taxo A
whole organ shuts down and leads to death
streptococcal toxic shock syndrome
positive result of SXT
(+) develops resistance
–> Group B (resistant)
MNEMONICS:
Be Resistant! C Sensitive
this test is more specific than bacitracin. what is its positive result?
Pyrrolidonyl Arylamidase Test
(+) cherry red
T or F
Group A streptococci is NOT part of the indigenous microbiota
T
it is a NOT normal flora
group of streptococci that is part of the normal flora of the female genital tract and lower gastrointestinal tract
Group B
–> transmitted nosocomially or vertical transmission from mother to fetus
