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19 Cards in this Set
- Front
- Back
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What organism is
-Non-spore forming Gram-positive bacilli -Related to Listeria spp |
Erysipelothrix
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What organism is
– Agent of swine erysipelis, widespread disease in pigs – Cause of erysipeloid, |
Erysipelothrix rhusiopathiae
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what is the size of Erysipelothrix
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Small Gram-positive bacilli (0.2 - 0.5 microns wide
by 0.8 – 2.5 microns long) |
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What media is associated with Erysipelothrix
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Wide temperature range growth on complex nutrient
media like Sheep blood agar |
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What organism has the characteristics
• Occur singly, in short chains or filaments • Aerobic or facultative anaerobic oxygen requirements • Non- motile • Catalase negative |
Erysipelothrix
(Resists cold and alkaline environment) |
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What is a cutaneous infection consisting of localize cellulitis following acquisition through skin abrasion, injury or bite?
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erysipeloid
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What is the specimen of choice for suspected Erysipeloid?
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Skin biopsy
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What media is used to cultivate Erysipelothrix
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Sheep Blood Agar with 5-10% CO2
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what not effective against Erysipelothrix?
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Aminoglycosides, sulfa and vancomycin
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What meds are used to treat Erysipelothrix?
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-Penicillin is drug of choice
• Various beta lactam antibiotics, tetracyclines and fluoroquinalones are effective |
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What organisms are dry and resembles “Chinese letters”
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Corynebacterium
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what is the most Significant human pathogen of Corynebacterium?
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C.diphtheriae
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how is C.diphtheriae transmitted?
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acquired from person to person and
is spread through close contact with carriers who harbor organisms either |
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What is a hallmark of C.diphtheriae (presents as a respiratory disease)
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Adherent membrane
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What complications are associated with C.diphtheriae disease.
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- Myocarditis
– Kidney and liver inflammation – Peripheral neuropathy – airway obstruction – death (occurs in 5%-10% of respiratory cases) |
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What is the specimen of choice for C. diphtheriae
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-Throat and nasopharyngeal
– Material under pseudomembrane useful |
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What is used to treat C. diphtheriae
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penicillin and erythromycin
(Antimicrobial susceptibility testing not commonly performed) |
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Corynebacterium other than C. diphtheriae is only signficant if
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-Isolated from otherwise sterile body sites
– If clearly predominant in mixed flora culture results grown from well collected sample – If recovered in high count (>104 cfu/ml) from urine as single organism |
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Significance of Corynebacterium other than C.diphtheriae is enhanced if:
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– Multiple specimens positive for same organism
– Coryneform bacteria seen on direct gram stain with strong leukocytic reaction |
