EXEECISE 59. SAPEOPHILIC CLASS. 95 



Bacillus vulgatus Trevisan. 



Synonyms. Bacillus mesentericus vulgatus Fluegge ; Potato 

 bacillus. 



Explanatory. This is a widely distributed organism which was 

 first described by Fluegge in 1886. Its spores are very resistant and 

 can almost invariably be found on potatoes. It can usually be ob- 

 tained by boiling potatoes for a half an hour, halving them and incu- 

 bating in a sterile moist chamber. 



References. Fluegge: Die Mikroorganismen, 1886; C. 271; L. 

 & N. 323 ; Mig. 2 : 556. 



MOKPHOLOGICAL CHAEACTEKS : 



1. Poem and abkangement: 

 u. Bouillon 



Sketches. 



6. Agar . 



c. Gelatin 



d. Other media. . 



2. Size: 



3. Staining powers: 



tt. Aqueous gentian- violet. . 



b. Loeffler's methylen-blue. 



c. Gram's stain 



d. Special stains 



4. Motility : 



a. Character of movement. . . 

 6. Flagrella stain 



5. Spores:. 



Special charaoteks: — 



u. Capsules 



6. Involution forms 



u. Deposits or vacuoles. . 

 iZ. Pleomorphism 



