OVINE CASEOUS LYMPH-ADENITIS l6l 



Nelson, Experimental studies of the Koch test for tuberculosis. 

 New Jersey. 1895. 



Nelson. The suppression and prevention of tuberculosis of cattle 

 and its relation to human consumption. Bui. iiS. New Jersey. 1S96. 



Nesom. Tuberculosis of cattle. Bui. 50. S. C. 1900. 



PE.-vr.SON. Tuberculosis of cattle. Bui. 29. Penn. 1S94. 



Russell. Tuberculosis and the tuberculin test, Bui. 40. Wiscon- 

 sin. 1894. 



Russell. The history of a tuberculous herd of cows. Bui. 78. 

 Wisconsin. 1S99. 



Russell .\nd H.\stings. Bovine tuberculosis in Wisconsin. Bui. 

 S4. Wisconsin. 1901. 



SlWLKER .\ND NiLES. Investigation of bovine tuberculosis with 

 special reference to its existence in Iowa. Bui. 29. Iowa. 1895, 



Thorne. Bovine tuberculosis. Bui. loS. Ohio. 1S99, 



Williamson and Emery. Tuberculosis and its prevention. Bui. 

 117. N. C. 1S95. 



OVINE CASEOUS LVMPH-ADENITIS. (PSEUDO TUBER- 

 CULOSIS IN SHEEP.) 



S 119. Characterization. Caseous h-mph-adenitis is a 

 disease of adult slieep wliich until recently was designated as 

 pseudo-tuberculosis. It lias been claaracterized by an enlarge- 

 ment of one or more lymphatic glands wliich contain foci 

 of a greenish-yellow, caseous or purulent substance. It is 

 rarely found in young animals. The mortality is very low 

 due, perhaps, to the fact that the sheep are slaughtered before 

 the disease has time to develop. It does not occur in epizootic 

 form although it is more prevalent in certain localities than in 

 others. 



^ 120. History. The name "Ovine Ca.seous Lymph Aden- 

 itis" was proposed by Norgaard and Mohler in 1899. These 

 writers found the lesions and the accompanying microorganism 

 to correspond with those described b}- Preisz and Guinard in 

 1 89 1 as pseudo-tuberculosis. The bacterium was fully described 

 by Preisz in 1S94. The organism has been found and identified 

 from a large variety of lesions in a number of species of ani- 

 mals. It appears that at least many of the cases of lymphatic 

 gland enlargement heretofore called pseudo-tuberculosis in 

 sheep belong to this disease. Cherry and Bull describe it as 

 caseous lymphatic glands and Sivori as caseous broncho-pneu- 

 monia ; the bacterium of Preisz being found as the probable 

 cause in each case. 



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