886 EXPERIMENT STATION RECORD. 



The control of hog cholera by slaughter methods, G. Hilton {Amer. Vet. 

 Rev., 44 (1914), No. 5, pp. 573-580). — In Canada the "premises on which this 

 malady is suspected, as well as adjacent ones, are promptly quarantined and 

 measures taken to establish a diagnosis. Directly this is accomplished, all 

 infected and contact hogs are slaughtered. The carcasses of the hogs which 

 have shown evidences of the disease, together with all debris, are cremated, 

 and when this procedure is impracticable they are covered with lime and deeply 

 buried. The apparently healthy hogs are suitably slaughtered on the owner's 

 premises, the carcasses carefully inspected, and a license issued permitting the 

 removal for sale purposes of any which are considered wholesome. It Is, how- 

 ever, not customary to remove the carcasses of hogs which have been in direct 

 contact with those showing symptoms of the disease. 



"As soon as all carcasses and contact matter have been satisfactorily disposed 

 of, the cleansing and disinfection of the premises is proceeded with; this is 

 done under the supervision of the veterinaiy inspector in charge of the outbreak, 

 and must be performed in a manner entirely satisfactory to him. Cheap, 

 crudely constructed, insanitary hog houses are burned, while proper measures 

 are taken to disinfect effectively the more modern structures. The yards to 

 which hogs have had access are covered with lime and carefully plowed under, 

 and the trees in the orchards or yards and fences are also disinfected from the 

 ground to a suitable height. No hogs are permitted to be brought to any farm 

 until a period of three months has elapsed from the completion of disinfection." 



Compensation is paid only for animals which are slaughtered at the request 

 of the inspector, and " a maximum valuation of $50 is allowed for registered 

 pure-bred hogs, and $15 for grades, the value In each case being adjusted by the 

 inspector whose decision is final." 



The distribution of the disease in Canada is also discussed. The importation, 

 manufacture, sale, or use of hog cholera serum is prohibited in Canada. 



Suggestions relative to the prevention of hog cholera, J. H. Kastle and 

 R. Geaham (Kentucky Sta. Bui. 181 (1914), PP- 149-155). — This paper includes 

 a tabular summary of I'esults obtained from the use of antihog-cholera serum 

 at the station during the month of June, which shows as low a mortality attend- 

 ing and following the inoculation as has been obtained elsewhere in the United 

 States. Of 3,180 hogs treated in 100 herds, reports of which were received, 

 2,961 or 93.1 per cent survived. 



About infectious abortion in pigs and hog cholera, Doerwachter (Mitt. 

 Ver. Bad. Tierarzte, 12 (1912), No. 10, pp. 149-153) .—During the last few years 

 (1911-12) abortion has oc-curred in hogs without giving any clue to the causa- 

 tive factors. As a premonitory sign in some animals the vagina was swollen 

 and an exudate was present. In other animals these phenomena were entirely 

 absent, but after abortion in all animals an odorless, grayish-yellow exudate 

 was present. Marked constitutional disarrangement was hardly ever present 

 before abortion took place. The fetuses and the afterbirths were often eaten 

 by the hogs. The boars used for serving the animals in no case .showed signs 

 of a diseased condition. The clinical appearances are described in detail in 

 the article with the methods of disinfection and isolation. 



A little later a very malignant form of the disease occurred and as a result 

 many sows died. The remarkable part of this enzootic was the presence of an 

 acute endometritis which is often noted in animals affected with hog cholera. 

 The pathologic anatomy resembled endometritis with a subsequent septicemia. 

 The bacteria noted in the uterine secretions at first appeared to be diplococci 

 but closer observation showed them to be bacilli with rounded ends. Whether 

 the organism in question was the Bacillus aiortus (Bang), B. suisepticus, B. 

 suipestifcr, or B, hipolaris septicus was not established. 



