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?

Pulmonary anthrax (A) Signup and view all the answers

What is the cardinal feature of cutaneous anthrax?

Painless swelling (D) 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?

0.5% hypochlorite solution (B) Signup and view all the answers

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

Not of above (D) Signup and view all the answers

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

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

Which of the following vaccines is effective in animals?

Sterne's (B) Signup and view all the answers

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

8,000-10,000 (C) Signup and view all the answers

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

Cell morphology and arrangement (A) Signup and view all the answers

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

Saprophytes (D) Signup and view all the answers

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

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

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

1-7 days (C) Signup and view all the answers

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

Painless swelling (C) 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?

Perform lab tests in a Class II Biological Safety Cabinet (A) 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?

0.5% hypochlorite solution (C) Signup and view all the answers

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

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

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

Michigan AVA (BioportR) vaccine (A) 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?

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

Flashcards

Habitat of Bacillus species?

Bacillus species typically live in the environment, feeding on decaying organic matter.

Transmission of cutaneous anthrax

Acquired through contact with spores or spore-contaminated materials.