420 



BACTERIOLOGY. 



located. (See Fig. 69.) From Neisser's observations 

 and those of others, 1 as well as from personal experience, 

 it seems safe in the vast majority of cases to regard all 

 bacteria that do uot stain in the way described as distinct 

 from bacterium diphtheriw. 2 



Blumenthal and Lipskerow 3 compared all the known 

 staining methods that had been suggested for the differ- 

 entiation between bacterium diphtheria and bacterium 

 pseudodiphtheriticum. They decide that the method 



FIG. 69. 



Bacterium diphtheria:, stained by Neisser's method. 



which yields the most satisfactory results is one whieh 

 had not heretofore been published, but which Dr. Lju- 

 binsky communicated to them. This method consists in 

 the fixation of the preparation for from one-half to two 



1 Frankel : Berliner klin. Wochenschrift, 1897. No. 50. 



2 Bergey : Publications of the University of Pennsylvania, New Series, 

 No. 4, 1898. 



3 Blumenthal and Lipskerow: Centralblatt f. Bacteriologie, Bd. 

 xxxviii., p. 359. 



