Chronological Appearance of Skin Lesions Quiz
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Questions and Answers

What is the appearance of colonies of Erysipelothrix rhusiopathiae on serum or blood agar?

  • Greenish and slimy
  • Large and opaque
  • Small, clear, and glistening (correct)
  • Red and rough

Which animal is commonly affected by Erysipelothrix rhusiopathiae?

  • Dogs
  • Rabbits
  • Cats
  • Turkeys (correct)

What is the unique characteristic of the cell wall of Erysipelothrix rhusiopathiae?

  • Contains spores for reproduction
  • Does not contain DL-diaminopimelic acid (correct)
  • Has flagella for movement
  • Contains DL-diaminopimelic acid

What disease form is Erysipelothrix rhusiopathiae known for causing?

<p>Polyarthritis (D)</p> Signup and view all the answers

What is the total number of serotypes identified for Erysipelothrix rhusiopathiae?

<p>22 (D)</p> Signup and view all the answers

What is the appearance of Erysipelothrix rhusiopathiae colonies on gelatin medium?

<p>Bottle brush-like (A)</p> Signup and view all the answers

What is the appearance of Listeria monocytogenes under the microscope?

<p>Coccoid forms (B)</p> Signup and view all the answers

Why is acid-fast staining technique not applicable for Listeria monocytogenes?

<p>It does not retain the stain applied (B)</p> Signup and view all the answers

What is the movement of Listeria monocytogenes under the microscope primarily due to?

<p>Flagella (B)</p> Signup and view all the answers

Why is the surface colonies of Listeria monocytogenes described as small, flat, round, transparent, and glistening?

<p>Specific colony characteristics (C)</p> Signup and view all the answers

Which feature of Listeria monocytogenes colonies indicates the presence of individual bacterial colonies or clusters that are too small to be easily discerned?

<p>Minute points (D)</p> Signup and view all the answers

What does a narrow zone of beta-hemolysis around Listeria monocytogenes colonies indicate?

<p>Limited red blood cell lysis (C)</p> Signup and view all the answers

What is the route of entry for polyarthritis in sheep?

<p>Docking and castration (C)</p> Signup and view all the answers

Which factor contributes to the development of vegetation on the heart valves in vegetative endocarditis?

<p>High fibrin content in the blood (A)</p> Signup and view all the answers

Which symptom indicates the presence of arthritis in cattle?

<p>Reluctance to move (C)</p> Signup and view all the answers

What is the effect of synovial lining hypertrophy in arthritic form of the disease?

<p>Erosion of cartilage (D)</p> Signup and view all the answers

When does cyanotic skin appear as a sign in birds?

<p>At initial stages of illness (D)</p> Signup and view all the answers

What characteristic feature is observed in joints affected by chronic forms of the disease?

<p>Enlarged and painful joints (D)</p> Signup and view all the answers

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