12 Questions
What is the main pathogenic species mentioned in the text?
Bacillus anthracis
How do Bacillus anthracis cells appear in tissue samples?
Short chains with rounded ends
At what temperature do the spores of Bacillus anthracis form?
15-40°C
What gives the colonies of Bacillus anthracis a 'Medusa-head' appearance under low power magnification?
Locks of wavy hair-like growth
Where are major anthrax enzootic zones located according to the text?
Tropics and subtropics
How do the vegetative cells of Bacillus anthracis respond to high temperatures?
They are killed at 60°C for 30 mins
What is the primary source of infection for anthrax?
Bone meal and vegetable protein
What is the role of Protective antigen (PA) in anthrax infection?
Necessary for biological activity of Edema factor (EF) and Lethal factor (LF)
How does anthrax toxin complex affect phagocytes?
Kills them
Which symptom is associated with the peracute form of anthrax?
Hemorrhaging
What is the method used to diagnose anthrax by detecting the capsular antigen?
Capsular antigen detected by agar gel precipitation test (AGPT)
Why is blood sampling from the ears veins recommended for diagnosing anthrax?
To release a minimum number of organisms in the environment
This quiz covers the characteristics of Bacillus anthracis, such as its morphology, pathogenicity, and modes of infection. Learn about the appearance of B. anthracis under different conditions and its impact on different animal species and humans.
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