130 HOG CHOLERA 



jected in the ham, and young pigs and shoats are 

 not injected behind the ear. Sometimes serum 

 is administered in the flank, or in the loose tissues 

 immediately back of the elbow, but we believe 

 neither practice has much to recommend it. 



Rapid and complete absorption of serum is 

 greatly to be desired, because it gives the highest 

 and most prompt immunizing effect, and tends to 

 prevent abscess formation. Some will inject no 

 more than 20 mils of serum in a place, believing 

 that a greater quantity will be absorbed but 

 slowly, but it is the placing and distribution of 

 the dose, much more than its size, that govern ab- 

 sorption. In real small pigs it is well to divide 

 the dose, and whenever possible the practice may 

 be followed in older animals. In injecting young 

 pigs the parts that receive the serum should be 

 kneaded gently after the needle is withdrawn; in 

 larger animals the needle should be thrust deeply 

 into the loose tissues immediately behind the ear, 

 and after the injection is completed the ear should 

 be drawn forward and vigorous massage applied 

 in order to distribute the dose. Serum injected 

 immediately beneath the skin, forming a distinct 

 welt, absorbs but slowly, and when it fails to 

 spread in the deeper tissues, as evidenced by un- 

 due pressure required in making the injection, 

 rapid absorption cannot be expected. A syringe 



