[A meningococcal epidemic in Ankara].

The meningococcal meningitis epidemic has been observed in Ankara in the last 3 years. Cases were from all parts of the country. Most of the strains isolated were from group B, while many could not be classified, and some of them were from group C, A and D. Because of fewer cases from group A and more from group B and C, the epidemic was not the classical meningococcal meningitis, but an intermediate one. Many cases could not be classified with the classical A, B, C, and D antisera. This showed that different serological groups existed in the country and should be taken into consideration in laboratory work.