THE CLASSIFICATION OF BACTERIA 353. 



6. Mycobact. murisepticum (Fliigge) 



B. murisepticus Fliigge : Die Mikroorganismen, 1886. 



B. Septikamie hei Mausen Koch : Aetiol. Wundinfectionsk., 1878. 



B. marinus Schroter: Kryptogamenflora Schlesien, III, 1886, 162, 



Probably identical with the preceding. 



7. Mycobact. malei (Loffler) Migula 



B. mallei Loffler: Arbeiten Kaiserlich. Gesundheitsamte, I, 1886, 141, 



Morphology. Bacilli small, slender, bent, 0.25-0.4:1.5-3 /«,; may occur as 

 coccoid elements. According to Marx (Centralblatt f. Bakteriol., XXV, 

 274), may show diphtheria-like and branched forms. Stain badly. Grow 

 best on glycerin agar ; a scanty growth on blood serum. 



Agar slant. In 24-48 hours at 37° C. whitish translucent watery colonies. 



Gelatin colonies. After weeks the gelatin begins to soften and small funnels- 

 are formed. Grows with an acid reaction of the medium. 



Potato. Growth yellowish — reddish brown ; show pleomorphic, anthrax- 

 like threads which become swollen involution forms. Indol doubtful. 



Pathogenesis. Rabbits but slightly affected, white and gray mice immune. 

 Intraperitoneal inoculations of 1-2 cc. into male guinea pigs cause death 

 in 12-15 days; testicles swollen and reddened, tubercles on tunica 

 vaginalis, suppurating organ contains the bacilli from which pure cultures^ 

 can be made. 



Habitat. Secretions and ulcers and tubercles in glanders in men, horses,, 

 cats ; sheep, goats, dogs, and rarely swine ; cattle and birds immune. 



8. Mycobact. lactis 



A Bacillus resembling B. dipktheri<B found in milk and American cheese Park-Beebe- 

 Williams : Sci. Bull. No. 2, Health Dept., New York City, 1895. 



Morphology. Bacilli more or less regular in shape and size resembling 

 diphtheria, but slightly thicker and of more variable length. On LofHer's- 

 blood serum bacilli like diphtheria, except slightly thicker and a little- 

 more irregular. 



Gelatin colonies. In 24 hours minute, punctiform ; microscopically, round, 

 entire, sharp, yellow, granular. No liquefaction. 



Gelatin stab. In depth, growth finely granular, white ; on the surface, growth, 

 abundant, light yellow, becoming deeper yellow. 



Agar colonies. In 24 hours at 20° small, punctiform, cream-colored, which 

 microscopically are coarsely granular, entire, grayish ; later the surface- 

 colonies are a little larger and have a decided yellow color. 



2A 



