SPECIAL BACTERIOLOGY 
133 
Recently Krumwiede* of New York has described 
a much simpler precipitin test. 
X. Immune Treatment 
The various vaccines and immune serums up to date 
are not of much value, but the serum prepared recently 
by Cole for Type I pneumococcus infection is very effi¬ 
cient and should be tried in all cases where the Type I 
has been identified. 
XI. Summary of Important Characteristics 
A Gram-positive, capsulated organism, occurs in pairs, 
grows only on *‘rich” media, causes no hemolysis on 
blood plates, but forms greenish colonies, ferments inulin, 
is bile soluble; there are four types of strains, the Type 
III being the most dangerous but occurring in the small¬ 
est number of cases ; serum treatment is efficient for Type 
I; produces endotoxin. 
♦Jour. Am. Med. Assn., 1918. 
