Food Poisoning Flashcards
1
Q
S. aureus
A
G+ cocci; grape-like clusters
catalase + (diff from strep)
coag + (diff from other staph)
beta hemolytic
2
Q
S. aureus virulence
A
enterotoxin (serotypes A-D) heat stable resistant to acidity and gast enzymes stim peristalsis stim vomiting can stim TSS and mediate cytokine storm
3
Q
S. aureus food poisoning
A
1-6hrs after eating
N/V/D/sweating/headache/cramps
watery and nonbloody diarrhea
antibios not indicated
4
Q
Bacillus cereus
A
G+ rod spore-forming resist to dry heat and chemical changes grains including rice esp reheated rice (spores germinate when warmed)
5
Q
B. cereus food poisoning
A
emetic --> 4hrs heat stable enterotoxin contaminated rice self limiting diarrheal --> 24hrs resembes clostridial gastroenteritis heat labile toxin --> inc cAMP contam meat, veggies, gravies self limiting
6
Q
Clostridium botulinum
A
G+ rod obligate anaerobe spore-forming found in soli, ponds and such home canning and home smoked fish honey w/ newborns
7
Q
C. botulinum virulence
A
neurotoxic exotoxin –> prev ACh release –> flaccid paralysis
8
Q
C. botulinum food poisoning
A
Food --> preformed toxin ingestion descending paralysis with other Sx Wound --> lack GI Sx Infantile --> honey with spores; most common form in US antibio not recommended
