Meningococcic meningitis in nonepidemic periods is essentially a disease of childhood. During epidemics and sharp outbreaks, the age incidence is considerably higher. The reason for this I do not know. Table 1 shows the age incidence in more than 1,300 cases of meningococcic meningitis. The distribution by age and etiology of the other more than common forms of meningitis is also shown. Table 2 shows the distribution by age and etiology of more unusual types of meningitis. Table 1 shows that by far the largest number of these cases of meningococcic meningitis occurred in the first year of life. It is at this age that the diagnosis is most difficult in the early stages of the disease and the case fatality is the highest. The same statement applies in a modified degree to children in the second year of life.
The clinical picture in older children follows closely that in