36 
PLEURO PNEUMONIA IN CATTLE. 
stables, and dairy herds is incessant; hence, too, it is far more 
likely to disappear, burnt out by its own tires, when located in 
country herds on inclosed farms, where no cattle are sold nor 
bought. (See our last year’s report, pages 9-31.) 
The first requisite, therefore, to the stamping out of the pes¬ 
tilence, is to prevent the commingling of fresh and susceptible 
cattle with those from infected herds. In other words, no store 
cattle should be allowed on a highway or exposed place in an in¬ 
fected district; and no two herds should be allowed to pasture on 
the same or adjacent fields in such infected district, without a 
special license granted after professional examination of the herd, 
and a certified history for the preceding six months showing an 
absence of changes, and, above all, of unexplained or suspicious 
changes in the personnel of the herd. 
The second requisite is in keeping, namely : no market for store 
cattle should be allowed to admit any animals from infected dis¬ 
tricts. 
These measures assured , the further conduct of the work is 
easy. The absence of these measures of control has been the 
grand reason of the comparative inefficiency of the work for the 
suppressing of lung plague in the different infected States, and of 
the continued prevalence of that pest after four years of effort. 
With these two measures efficiently applied in New York City in 
1870, three months sufficed to circumscribe the disease to the last 
four herds, and as these were all known they should have been 
wiped out in a day ; but the subsequent suspension of this control 
has permitted a renewal and general diffusion of the contagion. 
(See our last year’s report, pages 61-68.) 
Further measures are demanded as set forth in our report of 
last year, namely: 
1st. To compel the slaughter of all cattle in public markets to 
which cattle from infected districts are freely admitted. 
2d. To inspect all herds, abattoirs, rendering works, &c., in 
infected localities. 
* 3d. To slaughter all cattle found suffering with lung plague, 
and even the whole exposed herd when found expedient. 
4th. To indemnify the owners liberally for cattle thus slaugh¬ 
tered to prevent the maintenance and spread of the contagion. 
