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21 Cards in this Set
- Front
- Back
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Name the disease caused by C. Diptheriae
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Diptheria
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Describe C. diphtheriae virulence
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Spreads hematogeneously via toxin
Toxicity due to potent exotoxin carried by phage - Toxin causes peripheral nerve paralysis, myocarditis and death |
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Name 2 tubed media; 3 plates to help isolate C. diphtheriae
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Loeffle's serum slant
Pai coaggulated egg slant Blood agar chocolate agar Tinsdale or Tellurite Media |
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Name the stain for showing C. diphtheriae features
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Methylene Blue
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Describe C. diphtheriae classic morphology when stained
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X and V forms
Metachromatic granules and banding of cells - granules are phosphate reserves (babes ernst granules) |
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Describe the exotoxin and its targets
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Interferes with protein synthesis
Causes Fatty degeneration and circulatory collapse Neurological paralysis of soft palate - difficulty swallowing |
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Name 2 methods to prove virulence in C. diphtheriae
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Elek Toxin Test
Schick Test |
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Describe the catalase and motility reaction of C. diphtheriae
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Catalase +
Non Motile |
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Name 3 infections caused by Listeria
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Neonatal and adult Meningitis
Primary Bacteremia is pregnant women Food Poisoning |
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Describe Listeria colonies and hemolysis on a BAP
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Resembles S. Agalactiae
Weak beta hemolysis, gray translucent colonies |
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List the catalase and motility reactions of Listeria
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Catalase +
Motile |
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Describe Listeria growth in motility stab
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Umbrella - like appearance
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Describe the catalase, motility, H2S reactions for Erysipelothrix
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Catalase -
Non Motile H2S + in TSI slab |
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Describe the environment conducive to erysipeloid infections
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Microaerophilic
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Describe erysipelothrix appearance in gelatin stab
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Test tube brush appearance
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Name the aerobic spore forming genus
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Bacillus
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Name the most pathogenic aerobic spore forming species
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B. Anthracis
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Name and Describe three infections caused by B. anthracis
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Cutaneous Anthrax
Inhalation Anthrax ( Woolsorter's disease) Gastrointestinal Anthrax |
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Name the chemical component of capsule for B. anthracis
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D- Glutamic acid Polypeptide
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Describe the exotoxin of B. anthracis
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Edema Factor
Protective Factor Lethal Factor |
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B. anthracis Colony morphology
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Nonhemolytic
Medusa head colony (large, gray, tenacious) Appears like beaten egg when lifted |
