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28 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Most common isolate from dog and cat bites
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Pasteurella multocida
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General Characteristics:
Pasteurella |
Gram (-), coccobacilli
non-motile toxin producing requires cysteine to culture |
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General Characteristics:
Capnocytophaga canimorsus |
--Gram (-) fusiform bacilli (toothpick)
--requires CO2 for growth --Produces a substance that modifies PMN cell chemotactic activity |
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Common Anaerobes in animal bite wounds
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Bacteroides (think first)
Actinomyces Fusobacteria |
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Gram (-) bacilli or coccobacilli
polysaccharide capsule Produces SOD (can survive in O2) |
Bacteroides sp.
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Gram (+) bacilli
Filamentous |
Actinomyces sp.
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Anaerobic
Gram (-) bacilli pleomorphic occasionally only species involved (i.e. osteomyelitis) |
Fusobacterium sp.
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Human bite infxn
Gram (-) pleomorphic bacillus or coccobacillus produces bleach like odor Oxidase (+);Catalase(-); Urease (-); Indole(-) Facultative anaerobe Immune compromised |
Eikenella corrodens
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HACEK group
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Peptostreptococci
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Anaerobic Gram (+) cocci
Human bites inherant antibiotic resistant |
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B. fragilis required media
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BBE
(Bacteroides Bile Esculin) |
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Cat Bite/Scratch ---First thought
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Bartonella henselae
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Unilateral regional lymphadenitis in a child
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Bartonella henselae
Cat-scratch fever |
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Stain to dx Bartonella henselae
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Warthin-Starry silver stain
Do NOT culture |
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Bartonella henselae
Characteristics? |
Aerobic
pleomorphic, short gram (-) rod |
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Causative agents of Rat bite fever
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Streptobacillus moniliformis
Spirillum minor |
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Streptobacillus moniliformis
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aerobic, Gram (-) bacillus
Forms chains like strep Pleomorphic |
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Culture medium requirements for Streptobacillus moniliformis
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15% blood
20% serum 5% Ascitic fluid |
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Spirillum minor
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Spiral Shaped
Darting motility Cannot Culture |
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Spiral Shaped
Darting motility |
Spirillum minor
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How to dx Streptobacillus moniliformis
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BC
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Dx of Spirillum minor
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dark field preperations
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How to tell based on incubation time, what the causative organism is causing Rat bite fever
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Streptobacillus moniliformis <10 days
Spirillum minor 2 weeks |
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Rabies Virus
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Rhabdovirus
(-)ssRNA Bullet shaped |
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Dx of Rabies
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Postmortem:
presence of Negri Bodies in cytoplasm |
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Rat bite fever w/
headache, myalgias, arthralgia, arthritis |
Streptobacillus moniliformis
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Rat bite fever w/ lymphagitis, lymphadenopathy
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Spirillum minus
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Rabies viral replication occurs where
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DRG
and muscle at site of bite |
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Rabies Ig and active vaccine given in two sites on day 0. When are the next doses of the active vaccine given.
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3, 7, 14, 28
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