BACILLUS MALLEI 535 



Immunity. — Recovery from a glanders infection does not confer 

 immunity against a second inoculation.' Artificial active immunization 

 has been variously attempted by treatment with attenuated cultures, 

 with dead bacilli, and with mallein, but without convincing results. 



The serum of subjects suffering from glanders contains specific 

 agglutinins.^ These are of great importance diagnostically if the tests 

 are made with dilutions of, at least, 1 in 500, since normal horse serum 

 may agglutinate B. mallei in dilutions lower than this. 



1 Finger, Ziegler's Beitrage, vi, 1899. " Oaltier, Jour, de m.6d. v6t., 1901. 



