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18 Cards in this Set
- Front
- Back
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What causes Scarlet fever?
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Streptococcus pyogenes. It is G+ and occurs in encapsulated chains.
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Where do most Scarlet fever infections begin?
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As infections of the respiratory tract with spread to the blood.
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Do the bacteria produce a toxin?
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Yes. Erythrogenic toxin that causes a skin rash. Penicillin is therapeutic.
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What are complications of Scarlet fever?
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Damage to heart valves(rheumatic heart disease)) or joint disease(rheumatic fever).
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What causes Erysipelas?
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Strep. pyogenes.
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Where do lesions begin in Erysipelas?
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On the skin and grow with sharp borders. Penicillin is employed.
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What causes Impetigo contagiosum?
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It is causes a species of Strep, Staph and others. It occurs frequently in children.
Penicillin is recommended. |
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What is Madura foot?
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It is a general name for foot infections, one or both.
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What causes Madura foot?
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Soil organisms belonging to the genera of Nocardia, Actinomyces and Streptomyces.
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What type of lesions are caused by Madura foot?
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They cause granular lesions that spread and may invade muscle and bone.
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In Madura foot, what is the significance of sulfur like granules?
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They represent accumulations of microorganisms in the pus.
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What is Gas gangrene?
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It is a deep skin disease caused by Clostridium perfringens, C. novyi and C. septicum.
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How are the rods transferred to the wound?
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They are transported in spore form. They germinate and grow in dead and necrosed tissue which is anerobic, that putrfies the proteins and fermenting the carbohydrtaes to produce gas.
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When exactly does gangrene begin?
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The gas causes the tissue to expand, and as the cells die from lack of O2, gangrene begins. Antibiotics and O2 therapy with immune treatment is often obbligatory.
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What causes cat-scratch fever?
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Bartonella henselae(Rochalimaea Afipia has not been confirmed as a possible cause.
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What is Rat bite fever.
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It is caused by the bite of a rat. It may be caused by Spirillum minor or Streptobacillis monilformis.
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Is the Spirillum species flagellated?
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Yes The Streptobacillis is a Gram neg rod in chains.
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What are symptoms of Rat bite fever?
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Skin lesions, intermittent fever and a skin rash. Arthritis may also be present.
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