Q. Which one of the following can not be used for preparation of vaccines against plague?

A) Formalin-inactivated suspensions of virulent bacteria
B) Avirulent live bacteria
C) Synthetic capsular polysaccharide material
D) Heat-killed suspensions of virulent bacteria
Explanation

[Solution from source] Plague vaccines have been made from killed Yersinia pestis (heat-killed or formalin-inactivated) and from live avirulent (attenuated) strains. Capsular polysaccharide vaccines are used against encapsulated bacteria such as pneumococcus, Haemophilus and meningococcus, not against plague. Answer (3).

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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