476 PRINCIPLES OF VETERINARY SURGERY 



limbs may also be observed. The muscles may be the seat 

 of ti'aumatic alterations, ruptures of the fibres, ecchymoses, 

 hasmorrhagic infarcts and degenerative changes caused by 

 the contractions. They are deep red, blackish, infiltrated 

 and full of numerous ecchymoses. They are baked, so to 

 speak. Microscopic examination shows them to be granu- 

 lar. The striations cannot be seen and they are tumefied 

 and implicated in fatty or vitreous degeneration.. The lungs 

 show lesions of asphyxia. They exhibit congestion, super- 

 ficial ecchymoses, hsemorrhagic infarcts and finally pneu- 



FiG. 49. 



monia from foreign bodies, the consequence of false deglu- 

 tition, which is so frequent in tetanus. 



The mucous membrane of the respiratory tract exhibits 

 inflammatory lesions of variable intensity. Ecchymoses and 

 haemorrhagic foci are found in the pericardium, endocardium 

 and myocardium. The spleen is congested and the kidneys 

 are the seat of h^emorrhagic foci and of a more or less violent 

 inflammation. Every mu.cous membrane may exhibit ecchy- 

 motic spots and hjemorrhages. 



These lesions are the result of secondary infections. Most 

 of the investigations have been directed to the nervous sys- 

 tem with the aim of ascertaining the specific lesions. In the 

 pase of both spontaneous and experimental tetanuSv micro- 



