EXERCISE 63. ZYMOGENIC CLASS. iqq 



Bacterium acidi-lactici Zopf. 



Common Name. Lactic acid bacillus. 



Explanatory. This organism may be taken as a type of the 

 bacteria causing sour milk, of which there are a very large number. 

 It was first described by Hueppe in 1884. It is very widely dis- 

 tributed. 



Repeeences. Hueppe, Mitteil. aus dem Kaiserl. Gesundheits- 

 amte, 1884, Bd. II. p. 1837 ; C. 149 ; Cn. 189 ; L. 222 ; L. & N. 220. 

 Mig. 2 : 327. 



Morphological characters : 



1. Poem and arrangement: 

 u. Bouillon 



Sketches. 



6. Agar . 



c. Gelatin. 



d. Other media. . 



2. Size: 



3. Staining powers : 



u.. Aqueous gentian- violet. . 



b. Loeffler's methylen-blue. 



c. Gram's stain 



d. Special stains 



I. Motility : 



a. Character of movement. . . 

 6. Plagella stain 



5. Spores: 



Special CHARACTERS:. .. 



ci. Capsules 



6. Involution forms 



II. Deposits or vacuoles., 

 d. Pleomorphism 



