44 Catarrhal Inflammation 



The organisms are not motile and they have no flagella. 



Staining. The cocci stain by ordinary methods, but not 

 by Gram's method. 



Cultivation. The organism can be easily cultivated, 

 and thus differentiates itself from the fastidious gonococcus. 

 The colonies are large, white, irregular in outline, elevated at 

 the center, not viscid, and grow readily at room temperatures 

 upon all the culture-media, the best upon blood agar-agar. 

 The vitality of the organism in culture is not great. Very 

 often transplantations made after from four to six days fail 



Fig. 136. Micrococcus catarrhalis in smear from sputum (F. T. Lord; 

 photo by L. S. Brown). 



to grow; and in the cultures one usually finds many deeply 

 staining, supposedly living cocci, and many poorly staining, 

 supposedly dead organisms. 



Agar=agar. The culture in general resembles that of 

 Staphylococcus albus. When blood is added to the agar- 

 agar, the growth is more luxuriant, whitish, and usually 

 consists of closely approximated colonies which do not 

 become confluent. 



Gelatin. This medium is not liquefied. 



Bouillon. At the end of the first day no growth seems 



