@alisha-- The incubation period for viral and bacterial meningitis is similar. It's usually about ten days for both but it can range anywhere from two days to two weeks depending on the cause of the meningitis and the individual.
There is also fungal meningitis, but fungal meningitis is different. Apparently, fungal meningitis can have an incubation period of several months. I didn't know this either until last year. Several people died of fungal meningitis and there was a detailed article about it in the news.
Fever and stiff neck are the major symptoms of all kinds of meningitis. Even though the causes can be different, the symptoms are not going to change because meningitis means the inflammation of meninges-- the layers found in our spine and brain. So regardless of what's causing the inflammation, the signs and symptoms of meningitis will be the same.