200 Report 8. A. A. Advancement of Science. 



monia associated with pleurisy generally supervenes, and the animal 

 may die from this cause, or may ultimately recover, cilthough cases tjf 

 recovery when lung complications make their appearance are extremely 

 rare. 



Instances in which no visible indisposition has been observed, and 

 in which the animal is found dead with a frothy discharge from the 

 nostrils are, we believe, cases of some standing which have passed 

 unnoticed through the febrile stage, and collapsed subsequently, when 

 secondary pulmonary oedema sets in. 



In some atypical cases the duty undertaken by the kidneys in 

 typical cases, of excreting the blood pigment derived from the broken- 

 down blood corpuscles, seems to be undertaken by the bowels, and in 

 such tlie dung becomes black and tarry in colour, and when bowel 

 lesi<^)ns are severe, extensive luemorrhage results, apparently from 

 perforation of the walls of the internal blood-vessels by an ulcerative 

 progress, enormous casts of coagulated Ijlood being passed otf in the 

 dung, or found on post mortem in the lumen of the intestine. The 

 anaemia induced by these bowel h?emorrhages may, and <jften d<jes, 

 lead to death from exhaustion pure and simple. 



Post Mortem Appearances. 



These vary in detail, but it is possible to have almost e\ery organ 

 of the body affected, more or less, and in general it is one set which 

 show the lesions in the most marked degree. Thus the intestinal 

 tract may be mainly involved and the spleen and liver almost normal 

 to the naked eye examination, or the intestine may appear normal and 

 the spleen and liver be enormously congested. The kidney lesion is 

 extremely constant and the lyniphatic glands almost invariably affected. 

 Just as there are typical and at3'pical cases seen dui-ing life, so typical 

 and atypical post mortems are to be met with. 



The lesions on post mortem all tend to the impression that this is 

 a much more severe type of the disease than the redwater met with in 

 the Cape Colony, and one lesion, viz., that in the lungs, we have not 

 met with before in anj^thing like so iiuirked a degree 



Typical Case. — Post Mortem. 



Great pallor of subcutaneous tissues and of the visible mucous 

 membranes. If the carcase is well n<»urished the fat has generally a 

 yellowish or brownish yellow tinge. 



Hpleen. — Much enlarged, pulp diffluent and soft in appearance : it 

 has been aptly compared to black currant jam, its colour being darker 

 than normal and the white points or Mal])ighian bodies met with in a 

 healthy organ obliterated by swelling of surrounding pulp. The organ 

 may weigh from 10 to 15 lbs. (normal weight \\ to 2 ll)s.). 



JAver. — Enlarged, more friable than iiormal, and of a mahogany 



