Lung Plague of Cattle. 60 1 



ease on each occasion. This was true also of Schlesvvig so long 

 as it remained a part of Denmark, but the infection entered in the 

 cotnmisariat parks of the German army in 1864, and the princi- 

 pality remaining in German hands, the lung plague became per- 

 manently established. 



Mecklenburg-Schwerin and Oldenburg also maintained vigor- 

 ous suppressive measures and for long kept clear of the infection. 



Into Brooklyn, lung plague was introduced in 1843 through the 

 purchase of an English ship cow by a dairyman (Peter Dunn). 

 From this centre the infection spread until it prevailed in Con- 

 necticut, New York, New Jersey, Rhode Island, Pennsylvania, 

 Maryland, Virginia, District of Columbia, Ohio, Indiana and Illi- 

 nois. 



In 1879, measures were taken in New York and New 

 Jersey to extirpate the disease but failed to receive the requi- 

 site continued support and were practically abandoned. It 

 was only in 1887 when the infection had reached Chicago, the 

 largest cattle market in the world, that the National and State 

 Governments were aroused to the gravity of the danger, and, 

 the Federal Government supplying the funds and the Illinois 

 Government the authority, the beginning of a real attempt 

 at extinction was seriously undertaken. The author acted as 

 chief of the national veterinary force in Illinois in 1887, and takes 

 great pleasure in recording that at the end of three months from 

 the date of his arrival, the last acute case of the disease had been 

 disposed of and the frightful danger that had threatened the 

 nation through the Chicago stock yards had been removed. The 

 supervision was maintained for a year later, and some old seques- 

 tra were later found in the lungs of cattle slaughtered, but no 

 acute nor dangerous cases of the disease. This was followed by 

 vigorous suppressive work in other infected states and by Septem- 

 ber, 1892, the quarantine was raised and the nation pronounced 

 free from lung plague. The last cases were met with in New 

 Jersey, early in 1892. In this last anti-lung-plague crusade the 

 National Government inspected 1,605,721 cattle in 166,951 herds, 

 made 356,404 necropsies, purchased 21,961 head of cattle, and 

 disinfected 4,128 premises. 7,438 cattle were found affected at 

 the necropsy. 



Another line of infection was started by 4 Dutch cows, landed 

 at Boston in 1859, and before the end of the year the infection 



