528 



DISEASES AND THEIR TREATMENT. 



and a constant dribbling of urine, and involuntary fecal .passage. Temperature 103* 

 to 108°. No perceptible change of color in urine. In Azotaria the animal has sud- 

 denly partial loss of sensation, the urine and feces not voided. No perceptible rise 

 in temperature. The urine, if withdrawn from the patient, will be of a coffee- 

 brown color. The animal is uneasy, struggling and sweating over the flanks, and in 

 great pain. 



This difficulty is usually found in short-necked horses that are fed too much 

 grain. Scarcely ever find horses in moderate condition subject to it. — Dr. Meyer. 



Tetanus, or, Lock-jaw.' 



\ . ' 



This disease is wholly of a nervous character, being a peculiar 



irritability of the ner- 

 vous system, inducing 

 constant spasmodic 

 contraction of the vol- 

 untary, and after a 

 time the involuntary, 

 muscles, and is very 

 fatal unless treated 

 skillfully and careful- 

 ly. It is more com- 

 mon in the extreme 

 South than in the 

 North; and is more 

 liable to occur during 

 the warm months. 

 Symptoms. — In the, first, stage there is a disinclination to move ; 

 then the tail becomes erect and quivers, the ears -set back, and the 

 conjunctiva is thrown over the pupil of the eye, and the head is el- 

 evated, with" the muzzle and facial muscles contracted, the nostrils 

 open, and the whole expression of the countenance haggard and-ex- 

 cited, evincing great suffering. (A good idea is given by Fig. 839.) 

 As the disease advances, the muscles all over the neck and 

 body become stiff and rigid, and the legs have the appearance of a 

 four-footed stool. The animal has little or no power to move. 



For the fii'st few days the teeth remain apart, but as the disease 

 advances, the muscles of the jaw become so contracted as to bring 

 fheni close together. Hence the name " locked-jaw." 



The bowels are constipated, the urine scanty, and passed with 

 difficulty. The pulse is usually not very high, but is easily raised 

 by excitement ; he is very nervous, starts and quivers when any 

 one approaches him. His appetite remains good, and from inability 



Pig. 839.— Symptoms of Lock-jaw. 



