Muscle Pathology II: Causes and Pathology
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Questions and Answers

Which of the following is NOT a cause of muscle necrosis?

  • Infection (correct)
  • Toxins
  • Ischemia
  • Trauma
  • What is a common gross feature of muscle necrosis?

  • Bright yellow coloration
  • Swelling with red streaks
  • Dark red to black coloration (correct)
  • White discoloration
  • Which disease can lead to muscle necrosis without hemorrhage resulting in dark red to black muscle tissue?

  • Exertional Rhabdomyolysis (correct)
  • Vitamin E/Selenium deficiency
  • Toxicosis due to ionophores
  • Downer Cow Syndrome
  • What is a common cause of muscle necrosis in animals suffering from external trauma or sports injury?

    <p>Oxygen deprivation</p> Signup and view all the answers

    Which infectious agent is responsible for Blackleg in young ruminants?

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

    What is the major mechanism of muscle necrosis?

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

    What disease is characterized by antibodies against type 2M myosin in dogs?

    <p>Masticatory myositis</p> Signup and view all the answers

    Which infectious agent can transmit protozoal myopathy to puppies in utero?

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

    What type of muscle neoplasm is most common in the heart of piglets?

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

    Which immune mediated disease causes exercise intolerance and muscle weakness in adult dogs of various breeds?

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

    Which nematode encysts in myocytes, causing inflammation and eosinophilia?

    <p>Trichinella spiralis</p> Signup and view all the answers

    What is the major economic importance of Trichinella spiralis?

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

    What are the clinical signs of masticatory myositis if left untreated?

    <p>Muscle weakness and atrophy</p> Signup and view all the answers

    What microscopic feature is common in muscle necrosis?

    <p>Loss of cross striations</p> Signup and view all the answers

    Which animal is susceptible to extensive ischemic necrosis within a short period of time?

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

    What is the result of external pressure on muscles for prolonged periods?

    <p>Collapse of veins and arteries</p> Signup and view all the answers

    What can cause a 'Rabbit leg' condition in animals?

    <p>Repeated efforts to rise or single force trauma</p> Signup and view all the answers

    Which species is highly sensitive to ionophore toxicity?

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

    What deficiency can cause 'White Muscle Disease' or 'Nutritional Cardiomyopathy' in young animals?

    <p>Vitamin E and selenium</p> Signup and view all the answers

    What is a common outcome of stress during capture and translocation in wildlife?

    <p>Capture myopathy</p> Signup and view all the answers

    What is the cause of sudden onset of stiff gait, swelling of affected muscle groups, and reluctance to move in horses?

    <p>Exertional rhabdomyolysis</p> Signup and view all the answers

    What is a feature commonly observed in acute rhabdomyolysis in horses?

    <p>Coagulative necrosis and regeneration</p> Signup and view all the answers

    Which deficiency can lead to 'Nutritional Myopathy' characterized by pale or 'white' muscles in young animals?

    <p>Vitamin E and selenium</p> Signup and view all the answers

    What condition results in exercise-induced myonecrosis in any species, causing reluctance to move and non-specific signs of pain and discomfort?

    <p>Exertional Myopathy</p> Signup and view all the answers

    What is a common cause of muscle necrosis in animals suffering from external trauma or sports injury?

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

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