This document summarizes several microbial diseases that can affect the nervous system, including bacterial, viral, and prion diseases. It discusses bacterial meningitis caused by organisms like Haemophilus influenzae, Neisseria meningitidis, and Streptococcus pneumoniae. It also covers tetanus, botulism, and leprosy. For viral diseases, it mentions poliovirus and how the Salk and Sabin vaccines were developed for polio. Rabies virus and arboviral encephalitis transmitted by mosquitoes are also summarized. Finally, it briefly discusses prion diseases like scrapie, Creutzfeldt-Jakob disease, and mad cow disease.

1. Chapter 22 Microbial Diseases of the Nervous System