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48 Cards in this Set
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- Back
bordetella
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small gram neg cocci
aerobic, REQUIRE SPECIAL MEDIA: |
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Is there bordetella pneumonia?
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no
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other pertussis organisms?
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parapertussis (mild diseaes)
bronchiseptica (cats and dogs) |
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virulence factors?
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fimbrae hemagluttinin
like fimbrae but shorter and essential for colonization! Also, fha is major component of vaccine |
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toxins....
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Pertussis toxin (another major vaccine component)
tracheal cytotoxin adenylate cyclase toxin |
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Pertussis toxin
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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 |
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tracheal toxin
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stops ciliated cells from beating
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adenylate cyclase toxin
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adds bacterial adenylate cyclase into host cell to further increases camp
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where does it live?
human carriers? transmission? |
nasopharynx
Not much at all to speak of person to person, inhalation and shared secretions |
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other pertussis effects
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seizures, secondary infections of ears and sinuses lungs
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best detection technique
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pcr
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culture is bordet gengou blood agar or regan-lowe culture
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regan low is agar with blood and charcoal and abs
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treatment
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erythromycin
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environmental bacteria: legionella , pseudomonas, acinetobacter
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yes
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pseudomonas
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gram neg rods, obligate aerobes, motile (can't tell from ecoli and klebsiella, etc)
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where found
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soil and water
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pseudomonas major disease causing in what pop?
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immunocomp and
cystic fibrosis |
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which species major pathogens?
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p aeruginosa, stenotrophomonas maltophilia, burkholderia cepacia account for 80%
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I say CF you say?
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p aeruginosa pneumonia
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bio terrorism possibilities?
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burkholderia mallei and pseudomallei; acute severe pneumonia
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aeromonas hydrophila
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common cause of wound infections, especially in fresh water
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purple colonies?
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chromobacterium violaceum
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elizabethking meningosepticum:
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can cause meningitis
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acinetobacter baumannii
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first emerged as wound/bloodsttream infection in soldiers in iraq, trnsmitted from soil and water.
Nosocomial pneumonia |
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p aeruginosa
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very resistant to many disinfectants and antibiotics
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virulence factor
major one? |
capsule: antiphagocytic
slime layer: polysacc, easly lost Can change and make a mucoid capsule: alginate polysacchardide exclusive for cf strains |
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others?
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a bunch of toxins
(he mentioned 4 specificall but we don't have to know the names) |
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elastase
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degrades elastin and degrades alpha one anti tryp which makes neutrophils worse
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pigments?
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blue and yellow (possibly green)
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pseudomonas in cystic fibrosis
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doesn't go to blood stream
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burns?
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pseudomonas again
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pseudomonas color of pus?
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green
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uti
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pseudomonas associated with catheter
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whirlpools can give you?
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pseudomonas dermatitis (folliculitis)
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pseudomonas can also give you?
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swimmer's ear (acute otitis externa)
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also get?
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malignant otitis externa (associated with diabet)
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corneal infections?
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yes, especially through mascara brush damages
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endocarditis?
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IV drug users
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diagnosis?
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the general stuff
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treatment?
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piperacillin/tazobactam, 3 gen cephs, carbapenems, fluoroquin, aminoglycosides
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legionella
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yes
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disease?
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atypical pneumonia
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where does it live?
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inside aquatic protozoa
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which most common disease?
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l pneumophila
lp serogroup 1 only legionella in community acquired infections |
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distinctive props
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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) |
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pontiac fever:
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legionella mild respiratory disease
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diagnosis
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atypical; have to leave legionella specific tests;
urine antigen test very important now. |
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trtmnt
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azithromycin, now better survival with fluoroquins....can combine
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