What is the most common type of organism to cause infection of the brain. Name the organism which causes venereal warts. A person immunized with BCG vaccine will test positive with ppd.
Bacterial meningitis is less severe but more common than viral meningitis.
List the three modes by which infectious agents reach the lung to cause pneumonia. Name two of the virulence factors expressed by the bacterial causes of meningitis. List three reasons why the incidence of sexually transmitted diseases in increasing. Syphillis, which is caused by Treponema pallidum , has 3 stages of infection. Describe and differentiate the 3 stages.