296 BACTERIOLOGY. 



stained by the special method of Lijffler (see this 

 method in chapter on Stainings) is seen to possess very 

 delicate locomotive organs in the form of fine, hair-like 

 flagella, which are given off in large numbers from all 

 parts of its surface (see Fig. 57). These flagella are 

 not seen in unstained preparations, nor are they ren- 

 dered visible by the ordinary methods of staining. 



In patients suffering from this disease it has been 

 found during life in the blood, urine, and feces, and at 

 autopsies in the tissues of the spleen, liver, kidneys, 

 intestinal lymphatic glands, and intestines. 



Gelatin Plates. — Its growth, when seen in the 

 depths of the medium, presents nothing characteristic, ap- 

 pearing simply as round or oval, finally granular points. 

 On the surface it develops as very superficial, blue-white 

 colonies, with irregular borders. They are a little denser 

 at the centre than at the periphery. When magnified, 



Fig. 58. 



Colony of bacillits typhi dbdominalis on gelatin. 



the colonies present wrinkles or folds, which give to 

 them, in miniature, the appearance seen in the relief 

 maps made to represent mountainous districts. These 

 colonies have sometimes the appearance of flattened 

 pellicles of glass-wool, and usually present more or less 

 of a pearl-like lustre. 



On Agar- AGAR the colonies present nothing typical. 



