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12 Questions

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Bacillus anthracis Characteristics

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Questions and Answers

What is the main pathogenic species mentioned in the text?

Streptococcus pyogenes

Bacillus subtilis

Bacillus cereus

Bacillus anthracis (correct)

How do Bacillus anthracis cells appear in tissue samples?

Short chains with rounded ends (correct)

Long chains with square ends

Single round cells

Clusters of oval-shaped cells

At what temperature do the spores of Bacillus anthracis form?

60-70°C

Above 50°C

Below 0°C

15-40°C (correct)

What gives the colonies of Bacillus anthracis a 'Medusa-head' appearance under low power magnification?

Locks of wavy hair-like growth Signup and view all the answers

Where are major anthrax enzootic zones located according to the text?

Tropics and subtropics Signup and view all the answers

How do the vegetative cells of Bacillus anthracis respond to high temperatures?

They are killed at 60°C for 30 mins Signup and view all the answers

What is the primary source of infection for anthrax?

Bone meal and vegetable protein Signup and view all the answers

What is the role of Protective antigen (PA) in anthrax infection?

Necessary for biological activity of Edema factor (EF) and Lethal factor (LF) Signup and view all the answers

How does anthrax toxin complex affect phagocytes?

Kills them Signup and view all the answers

Which symptom is associated with the peracute form of anthrax?

Hemorrhaging Signup and view all the answers

What is the method used to diagnose anthrax by detecting the capsular antigen?

Capsular antigen detected by agar gel precipitation test (AGPT) Signup and view all the answers

Why is blood sampling from the ears veins recommended for diagnosing anthrax?

To release a minimum number of organisms in the environment Signup and view all the answers