EXERCISE 79. SARCINA GROUP. 163 



Sarcina tetragena (Gaff ky) Mig. 



Synonym. Micrococcus tetragenus Gafpky. 



ExPLANATOEY. First described in 1883 by Gaffky. It is found 

 in phthisical aavities and in sputum, and it occasionally occurs in 

 mixed infections as abscesses connected with carious teeth, about the 

 neck, jaws, and middle ear ; rarely elsewhere. 



References. Gaffky, Langenbeck's Archiv, 1883, 28, 500; A. 

 326 ; C. 84 ; Fl. 2, 155 ; H. 172 ; L. & N. 171 ; Mig. 2, 225 ; M. & R. 187 ; 

 M. & W. 133 ; McF. 571 ; P. 472. 



Morphological, chaeactees : 



Sketches. 



1. Form and areangement: 

 u-. Bouillon 



6. Agar . 



c. Gelatin. 



d. Other media.. 



2. Size: 



3. Staining powers: 



a. Aqueous gentian- violet.. 

 b- Loeffler's methylen-blue. 



c. Gram's stain 



d. Special stains 



4. Motility : 



a. Character of movement. . , 

 h. Plagella stain 



5. Spores: 



6. Special charaotees: 



W-. Capsules 



6. Involution forms 



t. Deposits or vacuoles.. 

 d. Pleomorphism 



