Spirochete : Brachyspira

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Questions and Answers

What is the primary species of Brachyspira that causes Swine Dysentery in pigs?

  • Brachyspira burgdorferi
  • Brachyspira hyodysenteriae (correct)
  • Brachyspira suis
  • Brachyspira coli

Where is Brachyspira hyodysenteriae commonly found in pigs?

  • Bloodstream of infected pigs
  • Respiratory tract of normal and affected pigs
  • Intestinal tract of both clinically affected and normal pigs (correct)
  • Urinary tract of carrier pigs

How is Swine Dysentery primarily transmitted?

  • Fecal-oral transmission from asymptomatic carrier pigs (correct)
  • Airborne droplets
  • Direct skin contact between pigs
  • Through contaminated water sources only

Which of the following plays a role in amplifying Swine Dysentery?

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

Which of the following can act as a mechanical vector for Swine Dysentery?

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

What is an essential virulence factor of Brachyspira hyodysenteriae?

<p>Motility in mucus (C)</p> Signup and view all the answers

What role do bacterial proteases play in the pathogenesis of Swine Dysentery?

<p>They disrupt the colonic mucosa, contributing to disease development. (B)</p> Signup and view all the answers

Which statement is true about Brachyspira hyodysenteriae’s survival in the environment?

<p>It does not survive well in the environment but can persist in anaerobic conditions. (B)</p> Signup and view all the answers

At what age are pigs most commonly affected by Swine Dysentery?

<p>6-12 weeks (C)</p> Signup and view all the answers

What is the primary clinical sign of Swine Dysentery?

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

What are the other clinical signs noted in swine dysentery?

<p>Dehydration, weight loss and emaciation</p> Signup and view all the answers

What is a common observation in pigs that recover from Swine Dysentery?

<p>Large amounts of mucus in feces (C)</p> Signup and view all the answers

Which diagnostic method involves staining fecal samples or tissues with Giemsa or silver stain?

<p>Direct staining and observation of spirochetes (B)</p> Signup and view all the answers

What type of culture is required to grow Brachyspira hyodysenteriae for diagnosis?

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

What is the most definitive molecular diagnostic test for Swine Dysentery?

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

How is Swine Dysentery primarily treated in affected pigs?

<p>Antibiotics in drinking water (C)</p> Signup and view all the answers

Which of the following is NOT a control measure for Swine Dysentery?

<p>Vaccination with a widely accepted and highly effective bacterin vaccine (D)</p> Signup and view all the answers

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