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20 Cards in this Set
- Front
- Back
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What g+ rod is a spore former?
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Bacillus
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What bacteria causes black eschar?
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B. anthracis
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How is B. anthracis tmitted?
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inhalation
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What are symptoms of B. anthracis?
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cough, chest pain, fever, nausea, vomitting blood
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Describe anthrax toxin
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AB toxin - A is effector and B is attachment; 3 components - protective Ag enabling entry, edema toxin in cAMP, lethal factor kills cells
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What are 2 types of food poisoning caused by B. cereus?
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diarrheal and emetic
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Describe diarrheal food poisoning caused by B. cereus
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starts 6-15 hrs after ingestion, diarrhea rarely vomitting, from meats and veggies, heat labile toxin - inc cAMP allowing water into lumen
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Describe emetic food poisoning caused by B. cereus
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30mins - 6 hrs after ingestion, vomitting rarely diarrhea, from starchy foods, heat stable toxin; tx - replace fluids, prevention - proper food handling
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What g+ rod causes eye infections?
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B. cereus, following trauma w/ soil contamination, rapidly progressive w/ loss of light perception in 48 hrs
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How is Corynebacterium diptheriae tmitted?
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resp droplets, facilitated by crowding, immune can be asymptomatic carriers
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What are the main characteristics of diptheria?
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upper resp inf w/ sore throat and low grade fever, pseudomem formation in tonsils, pharynx, and nasal cavity
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What is most common cause of death w/ Corynebacterium diptheriae inf?
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myocarditis
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What causes psedomem formation w/ diptheria inf?
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bacterial toxin kill epi forming fibrosupprative exudates that coagulate, bleed if dislodged, can extend into trachea obstructing breathing
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Describe diptheria toxin
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phage encoded, AB toxin, Fe dependent, inactivates EF-2 essential for ptn synthesis -> rapid cell death
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What is the source of Listeria monocytogenes?
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GI of poultry, cattle, sheep, 5-10% are carriers
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Who is at risk for Listeria inf?
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pregnant women and fetuses, immune compromised
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What bacteria causes still birth and septecemia, meningitis, encephalitis in newborns?
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Listeria monocytogenes
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What are the dx's caused by Listeria in immune compromised?
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meningitis, fever, nausea, diarrhea
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How is Listeria tmitted?
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ingest unpasteurized dairy, congenital during labor
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What bacteria can grow at fridge temps and is motile?
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Listeria monocytogenes
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