58 SWINE PLAGUE 
must be remembered, however, that bacteria not readily distinguish- 
able from the swine-plague organism exist in the normal upper air 
passages, from whence they could be brought into the lung and in 
such a case it might appear as a secondary invader only, or, it 
might have been primarily the cause of the lesions. It is not im- 
probable ‘that the disease may start from these sporadic cases, 
although conclusive proof of this is still wanting. It seems, how- 
ever, that the presence of this organism in the lung tissue of a spor- 
adic case should be considered in the light of the distribution of 
these organisms and not necessarily as the beginning of an enzodtic. 
Prevention. The well animals should be promptly separated from 
the sick and placed in suitable pens or yards, protected against subse- 
quent infection, and given wholesome food and water.* It is well to 
remove the sick animals to other pens. The infected pens should be 
thoroughly disinfected before they are again occupied. 
Specific biologic treatment. Although several attempts have been 
made to produce a specific biological remedy for swine plague, they 
have not been successful. 
REFERENCES 
1. ve Scuwemrrz. Serum therapy. Proceedings Society for the Promotion of 
Agricultural Science, 1896, p. 47. 
2. peScuwetntrz. The serum treatment of swine plague and hog cholera. Bulle- 
tin No. 28, U. 8. Bureau of Animal Industry, 1899. 
3. Evans. Hamorrhagische Septikamie des Elephanten. The Jour. of Tropical 
Vet. Science, Vol. 1, p. 283. 
4. Jorst. Schweineseuche und Schweinepest. Jena, 1906. 
5. Lorrrter. Arbeiten a. d. Kaiserlichen Gesundheitsamte, Bd. I (1885), S. 51. 
6. Moors. Pathogenic and toxicogenic bacteria in the upper air passages of 
domesticated animals. Bulletin No. 3. U.S. Bureau of Animal Industry, 1893. 
7. Moors. Concerning the nature of infectious swine diseases in the State of New 
York with practical suggestions for their prevention and treatment. Report of the 
New York State Commissioner of Agriculture, 1897. 
V8. Smirx. Preliminary investigations concerning infectious pneumonia in swine 
(Swine plague). Ann. Rpt. Bureau of Animal Industry, U. S. Dept, of Agriculture, 
1886, p. 76. 
9. SmitH. Special report on swine plague. Bureau of Animal Industry, U. 8S, 
Dept. of Agriculture, 1891, p. 47. 
\( 10. Sarrnx_anp Moors. Experiments on the production of immunity in rabbits 
and guinea pigs with reference to hog-cholera and swine-plague bacteria. Bulletin 
No. 6, Bureau of Animal Industry, U. 8. Dept. of Agriculture, 1894, p. 65. 
11. Weicn ano Crements. Remarks on hog cholera and swine plague. First 
International Veterinary Congress of America. Chicago, 1893. 
*As swine plague is frequently associated with hog cholera. it is recommended by 
many that the well pigs should be immunized against that disease. 
