82 



BACTERIOLOGICAL EXAMINATION 



the tube touches nothing. This is best held by an assist- 

 ant during catheter ization, so that it will not be 

 contaminated. 



Collection of Feces. The best method of collecting 

 feces is to have them passed directly into a sterilized 

 Mason jar. This, however, is not always practicable, 

 and they may be received in a thoroughly cleansed 

 bed-pan or chamber and transferred afterward to the 

 Mason jar by pouring or by a pair of forceps sterilized 



FIG. 24. Forms of hypodermic syringe: A, Koch's syringe; 

 B, syringe of Strohschein; C, Overlack's form. 



by passing through a flame. The cleansing of the 

 receptacle should be done by soap and water, alcohol, 

 and sterile w r ater. 



Collection of Blood for Widal Test. In preparing for 

 a Widal blood test (see Typhoid Fever) the finger or 

 ear lobe is cleansed with soap and water and alcohol. 

 It is then pricked with a needle and the blood collected 

 on unglazed paper, glass slides, or in glass tubes. For 

 direct examination of the blood the procedure with 

 the patient is the same. 



