1Vocab Flashcards
(21 cards)
post-exponential phase
detect a quorum and create exotoxins
flagellae
motor & whip for motility; never on G+ cocci
lag phase
enzymes being induced to allow growth
aerotolerant anaerobe
can grow in presence or absence of O2, but only ferment (no SOD or catalase)
protoplast
G+ bacteria without its cell wall
spheroplast
G- bacteria without is cell wall
log phase
exponential growth; 20 min to 2 days
obligate anaerobes
need absence of O2, fement (no SOD or catalase)
obligate aerobes
need O2, oxidative metabolism, have superoxide dimutase and catalase
minimum bactericidal concentration
minimum conc. of antibiotic that reduces bacteria by 3 fold
exotoxin
secreted protein
facultative anaerobe/aerobe
can grow in presence or absence of O2, have superoxide dimutase and catalase
endotoxin
LPS or LOS; part of G- cell wall
microaerophiles
aerobes that prefer reduced O2 levels
siderophores
iron scavengers
minimum inhibitory concentration
minimum conc. of antibiotic to stop growth
fimbriae
fuzz layer on cells for adhesion
mesophiles
can survive at body temp (37-42)
stationary phase
nutrients used up, growth stops
death phase
obligate fermenters die quickly in culture, oxidative live longer
dermatophytes
cannot grow at 37, so confined to skin
