EXEECISE 85. PNEUMONIA GROUP. 207 



Bacterium pneumoniae (Weichselbaum) Mio. 



Synonyms. Fraenkel's pneumococcus ; diplococeus pneumoniae 

 Weichselbaum ; Streptococcus laneeolatus Gamalelv. 



Explanatory. First described by Sternberg in 1880. Found 

 in saliva and in the nasal secretion of healthy persons— from 20 to 50 

 per cent. Usually present in "rusty sputum" of pneumonia 

 patients. 



References. Weichselbaum, Wiener Med. Jahrbuecher, 1886; 

 Welch, Johns Hop. Hosp. Bulletin, 1892, 3, 125; A. 321; C. 63; 

 H. 310 ; K. & W. II, 823 ; L. & N. 143 ; Mig. 2, 347 ; M. & R. 208 ; 

 McF. 289 ; P. 498. 



MOEPHOLOQIOAL CHARACTERS : 



Sketches. 



1. Form and arrangement: 

 u. Bouillon 



6. Agar . 



c. Gelatin. 



d. Other media.. 



2. Size: 



3. Staining powers: 



11. Aqueous gentian- violet. . 

 6. LoefBer's methylen-blue. 



c. Gram's stain 



d. Special stains 



4. Motility: 



u. Character of movement. . , 

 b. Plagella stain 



6. Spores: 



6. Special Characters:.... 



a. Capsules 



6. Involution forms 



c. Deposits or vacuoles. . 



d. Pleomorphism 



