Mycobacterium avium in Domestic Animals
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Questions and Answers

At what temperature does M.avium growth occur?

  • Above 60°C
  • 42°C - 55°C
  • 25°C - 42°C (correct)
  • 15°C - 25°C
  • What is the primary host of Mycobacterium avium?

  • Sheep
  • Birds (correct)
  • Pigs
  • Cattle
  • How is M.avium's acid-fast staining described?

  • Strongly acid-fast (correct)
  • Weakly acid-fast
  • Not acid-fast
  • Moderately acid-fast
  • Which bird-associated serotypes are frequently found in cattle according to the text?

    <p>Serotypes 1 and 2</p> Signup and view all the answers

    What type of lesions can M.avium cause in birds?

    <p>Gastrointestinal lesions</p> Signup and view all the answers

    How do birds become infected with M.avium according to the text?

    <p>By ingesting contaminated water or feed</p> Signup and view all the answers

    Which organ is generally enlarged in infected birds?

    <p>Spleen</p> Signup and view all the answers

    Where can ulcers be found in birds infected with tuberculosis?

    <p>In any part of the intestine</p> Signup and view all the answers

    What is a common characteristic of liver lesions in infected birds?

    <p>They contain caseous areas</p> Signup and view all the answers

    Which age group of pigs is more susceptible to M.avium infection?

    <p>Pigs between 4-8 weeks old</p> Signup and view all the answers

    How does the M.avium organism enter swine's body?

    <p>Through the tonsils or intestine lining</p> Signup and view all the answers

    Where do miliary lesions caused by M.avium commonly develop in cattle after entering through the portal circulation?

    <p>Liver</p> Signup and view all the answers

    What is the effect of M. avium on lymph nodes in cattle?

    <p>Causes minimal lesions</p> Signup and view all the answers

    Which animal species have reported cases of progressive tuberculosis caused by M. avium?

    <p>Sheep, goats, dogs, and cats</p> Signup and view all the answers

    In chickens, what type of immune response is observed with high or intermediate virulent strains of M. avium?

    <p>Both cell-mediated and humoral response</p> Signup and view all the answers

    What antibodies do cattle produce about 1 to 1.5 weeks after M. avium infection?

    <p>Agglutinins and complement-fixing antibodies</p> Signup and view all the answers

    How are typical lesions examined for the presence of acid-fast bacilli in the diagnosis of M. avium infection?

    <p>Ground in sterile broth</p> Signup and view all the answers

    Which method is used to detect M. avium infection in swine?

    <p>Ziehl-Neelsen method</p> Signup and view all the answers

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