Derm- microbiology Flashcards
what colour is staph aureus
golden
what colour is coagulase neg staph
white
how are staphylococcus sp arranged
gram positive cocci in clusters
which staph is coagulase positive
only staph aureus
antibiotic of choice for staph aureus infections (MSSA)
flucloxacillin
how are streptococcus species arranged
gram positive cocci in chains
which type of haemolysis shows complete haemolysis
beta-haemolytic
which type of haemolysis shows partial haemolysis
alpha haemolytic
which type of haemolysis shows no haemolysis
gamma/non-haemolytic
what is MSRA resistant to
flucloxacillin
what is ‘virulence’
The ability of an organism to cause disease within a host
name 5 virulence factors
adhesins
impedin
invasin
aggressin
modulin
what are adhesins
bacterial cell surface components that help organism stick to host
what are invasins
enable organisms to invade host tissue
what are impedins
help organism avoid defence/immune response in host tissue
what are aggressins
cause direct damage to host tissue and immune cells
what are modulins
cause indirect damage by turning immune system in on itself
staph aureus virulence factors
fibrinogen (adhesins)
leukocidicin
TSST-1
Give an example of a superantigen released by MRSA
TSST-1 (toxic shock syndrome)
Where in the body is Strep. pyogenes normally found?
throat
