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48 Cards in this Set

  • Front
  • Back
bordetella
small gram neg cocci
aerobic,
REQUIRE SPECIAL MEDIA:
Is there bordetella pneumonia?
no
other pertussis organisms?
parapertussis (mild diseaes)
bronchiseptica (cats and dogs)
virulence factors?
fimbrae hemagluttinin
like fimbrae but shorter and essential for colonization!
Also, fha is major component of vaccine
toxins....
Pertussis toxin (another major vaccine component)
tracheal cytotoxin
adenylate cyclase toxin
Pertussis toxin
b subunit binds to phagocytic cells and triggers endocytosis which gets A subunit into cytoplasm. S1 inhib monocyte and neut activation. incs cyc amp in cell. S1 is an adp ribose transferase.
Also causes lymphocytosis
tracheal toxin
stops ciliated cells from beating
adenylate cyclase toxin
adds bacterial adenylate cyclase into host cell to further increases camp
where does it live?
human carriers?
transmission?
nasopharynx
Not much at all to speak of
person to person, inhalation and shared secretions
other pertussis effects
seizures, secondary infections of ears and sinuses lungs
best detection technique
pcr
culture is bordet gengou blood agar or regan-lowe culture
regan low is agar with blood and charcoal and abs
treatment
erythromycin
environmental bacteria: legionella , pseudomonas, acinetobacter
yes
pseudomonas
gram neg rods, obligate aerobes, motile (can't tell from ecoli and klebsiella, etc)
where found
soil and water
pseudomonas major disease causing in what pop?
immunocomp and
cystic fibrosis
which species major pathogens?
p aeruginosa, stenotrophomonas maltophilia, burkholderia cepacia account for 80%
I say CF you say?
p aeruginosa pneumonia
bio terrorism possibilities?
burkholderia mallei and pseudomallei; acute severe pneumonia
aeromonas hydrophila
common cause of wound infections, especially in fresh water
purple colonies?
chromobacterium violaceum
elizabethking meningosepticum:
can cause meningitis
acinetobacter baumannii
first emerged as wound/bloodsttream infection in soldiers in iraq, trnsmitted from soil and water.
Nosocomial pneumonia
p aeruginosa
very resistant to many disinfectants and antibiotics
virulence factor
major one?
capsule: antiphagocytic
slime layer: polysacc, easly lost
Can change and make a mucoid capsule: alginate polysacchardide exclusive for cf strains
others?
a bunch of toxins
(he mentioned 4 specificall but we don't have to know the names)
elastase
degrades elastin and degrades alpha one anti tryp which makes neutrophils worse
pigments?
blue and yellow (possibly green)
pseudomonas in cystic fibrosis
doesn't go to blood stream
burns?
pseudomonas again
pseudomonas color of pus?
green
uti
pseudomonas associated with catheter
whirlpools can give you?
pseudomonas dermatitis (folliculitis)
pseudomonas can also give you?
swimmer's ear (acute otitis externa)
also get?
malignant otitis externa (associated with diabet)
corneal infections?
yes, especially through mascara brush damages
endocarditis?
IV drug users
diagnosis?
the general stuff
treatment?
piperacillin/tazobactam, 3 gen cephs, carbapenems, fluoroquin, aminoglycosides
legionella
yes
disease?
atypical pneumonia
where does it live?
inside aquatic protozoa
which most common disease?
l pneumophila

lp serogroup 1 only legionella in community acquired infections
distinctive props
gram neg rods
fastidious (need chocolate agar)
slow growth and strict aerobe
Intracellular growth inside lungs happens in macrophages!!!! (he said we should remember this)
pontiac fever:
legionella mild respiratory disease
diagnosis
atypical; have to leave legionella specific tests;
urine antigen test very important now.
trtmnt
azithromycin, now better survival with fluoroquins....can combine