Gram Positive Rods Flashcards
Erysipelothrix rhusiopathiae causes disease in what type of animals?
Fish and birds
How is Erysipelothrix rhusiopathiae transmitted to humans?
Occupational exposure, excreta of animals, rose-growers
Erysipelothrix rhusiopathiae is catalse ___ (pos/neg), indole (pos/neg), bile esculin (pos/neg), urease (pos/neg), nitrate (pos/neg), VP (pos/neg)
Negative for all!
Erysipelothrix rhusiopathiae produces what biochemical?
H2S
What is the gram stain morphology of Erysipelothrix rhusiopathiae?
Long, branching, pleomorphic gram positive rod
What are the three clinical infections caused by Erysipelothrix rhusiopathiae
Septicimia, endocarditis, and erysipeloid (lesions)
In a gelatin stab cx, what org has a “pipe-cleaner” and “test tube brush” apperance?
Erysipelothrix rhusiopathiae
Nocardia asteroides can cause three types of clinical infections
Nocardiosis– pulmonary (immunocomp), lymphocutaneous, and skin abscesses
This branching, gram positive rod is an intracellular pathogen
Nocardia
What genre produces a “musty basement odor”
Nocarida
Describe the colony morphology of Nocardia asteroides
Orange, glaborous, wavy colonies on 7H11
What is the species of Nocardia that DOES NOT hydroloze caesin, tyrosine, or xanthine?
Nocarida asteroides
What species of Nocardia hydrolyzes caesin and tyrosine, but NOT xanthine?
N. brasiliensis
What acid-fast organism is POSITIVE for caesin, tyrosine, and xanthine hydrolysis?
Streptomyces
What genre has a “dry and chalky” morphology?
Nocardia
Nocardia can grow up to what temperature?
50C
Listeria monocytogenes is _____ (motile/nonmotile), hydrolyzes _________ (biochemical), and has what type of hemolysis?
Motile (tumbling), bile esculin, beta
Describe the motility of Listeria monocytogenes on wet mount
Tumbling motility
Describe the motility of Listeria monocytogenes in semisolid agar
Umbrella
What is the preferred incubation temperature for Listeria monocytogenes?
25C
Where is Listeria monocytogenes found?
Dairy products and deli meats
Does bacillus species form spores?
Yes
Bacillus anthracis is _____ (non-motile/motile), _____ (hemolytic/non-hemolytic) and catalase ____ (pos/neg)
non-motile, non-hemolytic, catalase positive
What type of anthrax: Industrial or non-industrial?
The cutaneous inoculation or inhalation of anthrax spores by individuals cleaning or industrially processing contaminated leather hides, wool, or bone from contaminated animals.
Industrial
What type of anthrax: Industrial or non-industrial?
The acquisition of the organism from close contact with infected animals or with their carcasses or tissues
Non-industrial
What is the main way that you get anthrax?
Handling contaminated wool hides
What differential Corynebacterium media contains eggs
Loffler’s
What confirmation test is required to confirm toxicity of C. diptheriae before reporting
ELEK test
