232 BACTERIOLOGY. 



and the same long bacteria were again found in the 

 inoculated animals accompanying widespread infil- 

 tration, starting from the point of inoculation. 

 Inoculation of guinea-pigs and rabbits gave doubt- 

 ful results. The bacteria were found in the deeper 

 stratum of the diphtheritic patches. 



Bacterium of diphtheria of pigeons {Bacillus 

 columbarum, Loffler). Short rods with rounded 

 ends, mostly in irregular masses. In plate-cultiva- 

 tions on nutrient gelatine they formed whitish 

 patches on the surface, and compact, ball-like 

 masses when embedded in the gelatine. They 

 were also cultivated on blood serum and potatoes. 

 Subcutaneous inoculations in pigeons with a pure 

 cultivation produced local inflammation and 

 necrosis ; inoculation in the mucous membrane of 

 the mouth gave the appearances of the original 

 disease. Other animals were only locally affected, 

 except mice, in which characteristic symptoms 

 and death resulted. They were isolated from 

 the diphtheritic exudations in pigeons, and in 

 sections were found in the vessels of the lungs 

 and liver. 



Bacterium cholerae gallinarum (Micrococcus 

 cholerce gallinarum t Zopf. Bacterium of Fowl- cholera. 

 Microbe du cholera des poules}. Cocci 2 3 p, in diam., 

 short rods staining deeply at either pole, and longer 

 beaded rods (Figs. 79, 80). In the tissues they appear 

 mostly as rods 2 to 3 /x in length and 5 p, in diam., 

 with their extremities stained more deeply than 



