Use of Antipneumococcus-Serum-Agar for the Identification of Pneumococcal Types.

Abstract

A medium consisting of 1% dextrose beef infusion agar pH 7.8 and type specific antipneumococcus serum is presented. Pneumococci of the homologous type when grown in the depths of the immune serum-agar plate develop well defined annular opacity surrounding each colony. The development of the annular opacities has been found to be strictly type specific.