TYPHOID FEVER. 313 



stained by the special method of Loeffler (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. 61). 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 faeces, 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, 

 appearing simply as round or oval, finely 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, the colonies present wrinkles or folds, which 



FIG. 62. 



Colony of bacillus typhi abdominalis on gelatin. 



give to them, in miniature, the appearance seen in the 

 relief maps made to represent mountainous districts 

 (Fig. 62). These colonies have sometimes the appear- 

 ance 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. 



