Can tell me what is the period from getting the germ to the time meningitis becomes fatal to the person?

We do not know the time interval from acquiring the bacteria to developing meningitis. It is thought to be relatively short - 1-2 days after the bacteria infects the nose and throat. Most deaths from meningitis occur very rapidly - in less than a day from onset of the fever. Fortunately, such rapidly fatal cases occur in only a small proportion of all cases.