Z22, 



escape of the infection can be effectively guarded against, should 

 be allowed the practise of any method which carries with it the 

 dissemination of pathogenic (disease producing) organisms. 



CONTROLLING CARRIERS OF CHOLERA INFECTION. 



By J. W. CoNNAWAY, University of Missouri. 



Breeder's Gazette, Sept. 30, 1915, pp. 548-550. 



The most dangerous distributors of hog cholera infection with 

 which the farmers have to deal are the sick and the exposed hogs. 

 And if the farmers will devote greater attention to the control of 

 these primary carriers and distributors of cholera infection, and 

 will carry out the measures of control recommended herein, relat- 

 ing to dead hogs and infected feedlots, there will be but little 

 danger from the distribution of cholera by the several secondary 

 carriers that will be mentioned ; for there will be but little infec- 

 tion to carry. 



It is far more important to watch the hogs than the buzzards. 

 The driving of sick hogs upon the highways to market is pro- 

 hibited by law, but the law is sometimes broken by those, who are 

 ignorant of the provisions, and sometimes by those who know 

 the requirements of the law, but ignore them, and have no regard 

 for the rights of their neighbors. Sick hogs should never be 

 removed from the farm, but should be closely quarantined until 

 they have recovered or died. The infection and infected carcasses 

 should be destroyed. The shipment of sick hogs to the market, 

 even when hauled to the shipping station, spreads the disease, 

 and increases the dangers at the local and large central stockyards, 

 as well as being a source of danger to the farms lying along the 

 railroad lines. 



Healthy hogs that have been exposed to sick hogs in the same 

 feeding pens may communicate the disease from contamination 

 of their feet and bodies, and should not be driven over the road- 

 ways to market. They should always be hauled to the shipping 

 station. If driven to market the farms along the highway are 

 endangered. vStreams, crossing the highway and passing through 

 one or more farms, may become sufficiently contaminated from 

 the feet and bodies of the hogs to start an outbreak. Only 

 healthy hogs, from clean farms, should be driven to market, and 

 it is probably a good practice to haul these, on account of the 

 shrinking in weight from driving. 



It is possible for cattle that have been fed in feedlots where 

 hogs have been dying of cholera to carry the infection on their 

 feet, when driven to market, and to spread the virus along the 

 highway, whence it may find its way to adjacent farms.. The 

 feet of cattle may be easily disinfected by driving the animals 

 through the dehorning chute, in the floor of which every farmer 



