Clinical Bacteriology II Flashcards
botulism
clostridium botulinum
heat labile toxin - inhibit ACh release - at NMJ
flaccid paralysis
floppy baby
canned food and honey (kids)
honey in kids
botulism - spore ingestion
floppy baby
canned food in adults
botulism - preformed toxin ingestion
flaccid paralysis
tx botulism
antitoxin
gas gangrene
clostridium perfringes
alpha toxin - mynecorsis and hemolysis
pseudomembranous colitis
clostridum dificile infection
two toxins
A - bind brush border of gut
B - cytoskeletal disruption - actin depolymer - pseudomembranous formation
secondary to antibiotic use
C. dif
tx of C. dif
metrondiazole
oral vancomycin
anthrax
bacillus anthracis
gram positive spore forming rod
polypeptide capsule bacteria
only one - bacillus anthracis - D-glutamate
cutaneous anthrax
painless papule surrounded by vesicle - ulcer with black eschar
bacillus anthracis
pulmonary anthrax
inhale spores
-flu-like sx - rapid progress to fever, pulmonary hemorrhage, mediastinitis, shock
death
nausea and vomit after eating rice
bacillus cereus
nausea and vomiting 1-5 hours - preformed toxin cereulid
diarrhea watery, nonbloody, within 8-18 hours
cereulide
preformed toxin bacillus cereus
rocket tails
actin polymer - with listeria monocytogenes
-allow intracellular movement and cell to cell spread
listeria monocytogenes
facultative intracellular
unpasteurized dairy, cold deli meat, transplacental, vaginal during birth
meningitis with listeria
infant, immunocompromised, elderly
tx - ampicillin
actinomyces class
long branch filament
gram positive anaerobe
not acid fast
normal oral flora
oral facial abscess drain through sinus tracts - yellow sulfur granules
tx - PCN
nocardia class
long branching filament
gram positive aerobe
acid fast
found in soil
pulm infection in immunocompromised
cutaneous infection after trauma - immunocompetent
tx - sulfonamides
tx of actinomyces
PCN
tx of nocardia
sulfonamides
ghon complex
primary TB
-lower to mid zones of lung
also see hilar nodes with primary TB
heals - by fibrosis
secondary TB
fibrocaseous cavitary lesion - upper lung lobe
pott disease
TB to vertebral body