Gram-Positive Bacilli
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Questions and Answers

Which species of Gram positive bacilli is motile?

  • B.anthracis (correct)
  • B.subtilis
  • B.cereus
  • All species are motile

Which of the following is NOT a characteristic used to classify Gram positive bacilli?

  • Spore formation and Catalase production
  • Cell morphology and arrangement
  • Atmospheric needs
  • All of above (correct)

What type of colonies does B.anthracis produce on blood agar?

  • Beta-hemolytic colonies
  • Non-hemolytic colonies (correct)
  • Alpha-hemolytic colonies
  • Gamma-hemolytic colonies

Which type of anthrax is caused by inhalation of spores?

<p>Pulmonary anthrax (A)</p> Signup and view all the answers

What is the cardinal feature of cutaneous anthrax?

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

Which of the following is the most effective decontamination solution for spills involving material suspected to be contaminated with B. anthracis?

<p>0.5% hypochlorite solution (B)</p> Signup and view all the answers

Which of the following stains is NOT used for the laboratory diagnosis of anthrax?

<p>Not of above (D)</p> Signup and view all the answers

Which of the following is the correct treatment regimen for cutaneous anthrax?

<p>Ciprofloxacin 500mg BD for 7 days (D)</p> Signup and view all the answers

Which of the following vaccines is effective in animals?

<p>Sterne's (B)</p> Signup and view all the answers

Which of the following is the correct minimum infective dose for inhalational anthrax?

<p>8,000-10,000 (C)</p> Signup and view all the answers

Which of the following is NOT a characteristic used to classify Gram positive bacilli?

<p>Cell morphology and arrangement (A)</p> Signup and view all the answers

Which of the following is the correct habitat for Bacillus species?

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

Which of the following is the correct mode of transmission for cutaneous anthrax?

<p>Contact with spores or spore contaminated materials (D)</p> Signup and view all the answers

Which of the following is the correct incubation period for cutaneous anthrax?

<p>1-7 days (C)</p> Signup and view all the answers

Which of the following is the correct clinical feature of cutaneous anthrax?

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

Which of the following is the correct method for handling laboratory specimens suspected to be contaminated with B. anthracis?

<p>Perform lab tests in a Class II Biological Safety Cabinet (A)</p> Signup and view all the answers

Which of the following is the correct decontamination solution for spills involving fresh clinical samples contaminated with B. anthracis?

<p>0.5% hypochlorite solution (C)</p> Signup and view all the answers

Which of the following is the correct treatment regimen for inhalational anthrax?

<p>Ciprofloxacin 500mg BD for 60 days (C)</p> Signup and view all the answers

Which of the following is the correct vaccine for high-risk individuals against anthrax?

<p>Michigan AVA (BioportR) vaccine (A)</p> Signup and view all the answers

Which of the following is the correct method for decontamination of spills involving lab samples contaminated with B. anthracis?

<p>Gently cover spill and soak for one hour (B)</p> Signup and view all the answers

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