This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
All of the following are therapeutic uses of penicillin G, except 
Select and explain. 
A. Bacterial meningitis, B. Rickettsial infection, C. Syphilis, D. Anthrax
B: Rickettsial infection
Answer: B: Rickettsial infection 
Explanation: Ans. is 'b' i.e., Rickettsial infection Penicillin G is the DOC for 1. Meningococcal meningitis 7. Leptospira 2. Bacillus anthracis (anthrax) 8. Actinomyces israelii (Actinomycosis) 3. Clostridium perfringens (gas gangrene) 9. Borrel i a burgdorferi (Lyme disease) 4. Clostridium tetani (tetanus) 10. Enterococci 5. Corynebacterium diphtheriae 11. Streptococci 6. Treponema pallidum (syphilis) 12. Susceptible pneumococci