184 HOG CHOLERA 



5. The virus may be carried b}' buzzards, crows and 

 other birds. There is no positive proof that the virus has been 

 disseminated in this waj' although there is much evidence to 

 support such a theory, particularly in the South. Several out- 

 breaks have been attributed to this method of introducing the 

 virus, The hypothesis emphasizes the necessity for promptly 

 disposing of the dead animals instead of leaving them as prey 

 for scavengers. If they cannot be burned it is best to cover 

 the bodies with a liberal amount of lime and bur}' them. 



§ 140. Specific treatment. A large number of inves- 

 tigations have been made to find a protective vaccine method 

 for this disease and also to find a specific serum treatment. 

 Thus far satisfactorj- experimental results have not been 

 obtained. In a number of instances where the practical 

 applications of the "serum treatment" has been made, most 

 satisfactory results followed, but the reports fail to give evi- 

 dence of an accurate diagnosis of the disease treated. In 

 these cases, the better management of the animals, in addition 

 to the serum, would suffice to check the disease if the trouble 

 was of a dietary nature. There is need for additional inves- 

 tigation along these lines. 



REFERENCES. 



1. BiLi,iNGS. Bulletins Neb. Agric. Expt. Station 18SS. Also many 

 special publications and contributions to various veterinary journals. 



2. Dawson The serum diagnosis of hog cholera. New York Med. 

 lout. Feb. 20. fSgj. 



3. DE SCHWEiNiTz, The production of immunity in guinea pigs 

 from hug cholera by the use of blood serum from imnjunized r.ninials. 

 Annual Report of the Biireau of Animal Industry, U. S. Dept. of Agri- 

 culture. iS()S. 



4. Peters. Serv.m therapy in hc:g cholera. Bulletin No. 4J. 

 Univ. of Neb. Agri. Exper. Station. iSgy. 



5. Sai,mon and Smith. Annual Reports of the Bureau of Ani- 

 mal Industry. iSS^-iSc)^. 



6. Salmon. Special Report on hog cholera, its History, Nature 

 and Treatment. U. S. Bureau of Animal Industry. iSSg. 



7. Smith. Zur Kenntniss des Hog cholera Bacillus. Anlralhlatt 

 fur Bakter. u. Parasitenk-unde. Bd. IX. (1891)8. 253, 



S. Smith. Hog cholera group of bacteria. Bulletin No. 6 U. S. 

 Bureau of Animal Industry. 1894. p. 9. 



9. Smith and Moork. Experiments on the production of immu- 

 nity m rabbits and guinea pigs with reference 10 Ijog cholera and swine 

 plague bacteria, fbid. p. 41. 



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