CHAPTER V 



POST-MORTEM EXAMINATION, PATHOLOGICAL 



ANATOMY, AND PATHOLOGICAL 



HISTOLOGY 



Post-mortem Examination and Patholog-ical Anatomy. 



— In making a post-mortem examination of a case of 

 Johne's disease one should follow the ordinary proce- 

 dure. It is well in the case of a cow to examine 

 the supramammary lymphatic glands for evidence of 

 tuberculosis. The abdominal cavity should be opened, 

 and the stomachs and intestines, together with their 

 lymphatic glands, must be removed for a closer 

 scrutiny. The remaining abdominal organs, the thorax 

 with its contents and glands, and the pharyngeal lym- 

 phatic glands, should also be inspected for evidence of 

 tuberculosis and other pathological conditions. The 

 stomachs having been opened, they should be examined 

 for any abnormalities ; this applies particularly to the 

 abomasum, in which strongyles may be found. 



The intestines must be slit up their entire length 

 with bowel scissors, or with a sharp knife with a cork 

 on its point, and lightly washed to rid them of ingesta, 

 a large sink being convenient for this purpose. 



Perhaps the most striking feature of this disease is 

 the insignificant character of the lesions met with in 

 comparison with the state of emaciation to which 

 affected animals are, as a rule, reduced, and the fact 



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