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BACTERIOLOGY & MYCOLOGY LECTURE > ERYSIPELOTHRIX > Flashcards

ERYSIPELOTHRIX Flashcards

1
Q

Other term for Erysipelothrix rhusiopathiae

A

Swine rotlauf bacillus

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2
Q

Common disease caused by Erysipelothrix rhusiopathiae

A

Swine erysipelas in young pigs

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3
Q

What are the disease forms of Erysipelothrix rhusiopathiae?

A
  1. Diamond skin disease
  2. Septicemia
  3. Polyarthritis
  4. Endocarditis
  5. Abortion
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4
Q

What do you call the skin lesions in human caused by E. rhusiopathiae?

A

Erysipeloid

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5
Q

Give the morphology of E. rhusiopathiae.

A
  • Gram (+) but easily decolorized and stain unevenly
  • Rough forms exhibit long filaments
  • No spores, no flagella
  • Cell wall does not contain DL-diaminopimelic acid (differentiated
    from L. monocytogenes)
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6
Q

On BAP, what discoloration does E. rhusiopathiae induces?

A

First a greenish discoloration and later a definite clearing

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7
Q

Colonies of E. rhusiopathiae appear what form on serum or blood agar?

A

Tiny, clear, and glistening

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8
Q

How many serotypes of E. rhusiopathiae are existing? What types are most commonly found in cases of septicemia and in tonsils?

A

22 serotypes; 1 and 2

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9
Q

What is the protective antigen of E. rhusiopathiae?

A

Glycoprotein

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10
Q

E. rhusiopathiae is common in areas with acidic soil. True or Fale?

A

False, alkaline

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11
Q

E. rhusiopathiae is resistant to drying, smoking, pickling, and salting. True or False?

A

True

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12
Q

E. rhusiopathiae is commonly caried in what body structures?

A
  1. Tonsils
  2. Reticuloendothelial tissue
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13
Q

What are the predisposing factors of E. rhusiopathiae infection?

A

Excessive heat and humidity

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14
Q

Give the route of infection of E. rhusiopathiae.

A
  1. Oral
  2. Skin scarification
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15
Q

Give the form of E. rhusiopathiae with the given conditions:

  • Deep red patches on skin particularly in ears, abdomen, inside
    of legs
  • Spleen and lymph nodes enlarged and reddened
  • Stomach and intestines inflamed, hemorrhagic
  • Kidneys with ecchymotic hemorrhages
  • High mortality
A

Acute

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16
Q

Give the form of E. rhusiopathiae with the given conditions:

  • Urticarial skin lesions -> red rhomboidal blotches in abdomen -
    > diamond-shaped (diamond skin disease) -> areas become
    necrotic _> dries into dense scabs and peel off -> bleeding if
    removed too soon
A

Less severe form

17
Q

Give the form of E. rhusiopathiae with the given conditions:

  • Increased levels of SGOT and marked hypoglycemia
  • Increased RBC destruction, decreased Hb and PCV
  • Late stages spleen enlarged and pulpy
  • Hemagglutinating activity
  • Neuramidase associated with generalized coagulopathy -> thrombi
    in blood vessels, fibrin in joints, heart valves and muscles
  • High fever due to endotoxin, a glycoprotein which produces shock effect
A

Severe septicemic phase

18
Q

Give the form of E. rhusiopathiae with the given conditions:

  • Vegetative endocarditis -> mitral valves eroded and covered with
    fibrin deposits -> functioning seriously impaired
A

Chronic form

19
Q

Give the form of E. rhusiopathiae with the given conditions:

  • Older animals, sequel to more acute forms of disease
  • Joint enlarged and painful -> reluctant to move , gaits stilted, growth
    stunted
  • Synovial lining hypertrophy with villous projections into joint space
  • Erosion of cartilage, increase in synovial fluid with high neutrophil
    content
  • As disease advances, organism difficult to isolate
  • More severe in vaccinated swine and with autoantibodies
    (rheumatoid factor)
A

Arthritic form

20
Q

Give the diseases induced by E. rhusiopathiae in sheep.

A
  1. Polyarthritis
    (route of entry: docking and castration)
21
Q

Give the diseases induced by E. rhusiopathiae in cattle.

A
  1. Arthritis: tibio-tarsal, stifle, carpal joints
22
Q

Give the diseases induced by E. rhusiopathiae in birds.

A
  1. Bluecomb, cyanotic skin
  2. Droopy, develop diarrhea and die
  3. Massive hemorrhage and petechiae in muscles of breast and legs
23
Q

Give the diseases induced by E. rhusiopathiae in lab animals

A
  1. White mice highly susceptible (??)
24
Q

Give the diseases induced by E. rhusiopathiae in aquatic animals.

A

Crocodile, bottle nosed dolphins

25
Q

Give the immunization methods against E. rhusiopathiae.

A
  • Protective immunity: serum and cell-mediated
  • Growth-agglutination test Wachstumsprobe test
  • First attenuated vaccine by Pasteur and Thiullier
  • EVA erysipelas vaccine avirulent -> attenuated vaccine
  • Killed vaccines
26
Q

Give the diagnoses of Erysipelas.

A
  1. Bright and alert
  2. Continue to eat
  3. Not common
  4. Spleen enlarged, bluish-red
  5. Stomach highly inflamed, dark, bluish
  6. Lymph node not congested
  7. Ecchymoses
27
Q

Human erysipeloid and erysipelas is caused by what bacteria?

A

Hemolytic streptococci sp.

BACTERIOLOGY & MYCOLOGY LECTURE (10 decks)

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