NECROBACILLOSIS 225 
11. Report of the committee on the Nomenclature of Swine Diseases. Report of 
the U. S. Live Stock Sanitary Association, 1911, p. 142. (The name Salmonellosis 
was recommended and accepted by the Association.) 
12. Satmon. Special report on hog cholera, its history, nature and treatment. 
U. 8. Bureau of Animal Industry, 1889. 
13. Smirn. On a pathogenic bacillus from the vagina of a mare after abortion. 
B. A. I. Bul. No. 8, 1893, p. 53. 
14, Smrrx. Other Bacilli not found in outbreaks of Hog Cholera, which belong 
to the same group. B. A. I. Bul. No. 6, 1894, p. 17. 
15. Smrra anp Moors. Experiments on the production of immunity in rabbits 
and guinea pigs with reference to hog cholera and swine-plague bacteria. B. A. I. 
Bul. No. 6, 1894, p. 41. 
16. TuomassEnN. Une nouvelle septicémie des veaux. Ann. del’ Inst. Pasteur, 
Vol. I (1897), p. 523. 
17. Turner. A new cattle disease. The Veterinary Journal, Vol. XXXVI 
(1893), p. 239. 
NECROBACILLOSIS 
Characterization. Necrobacillosis is a name given to the various 
lesions caused by Bacillus necrophorus in different species of animals. 
It is characterized by more or less sharply circumscribed areas of 
necrosis or by a progressive destruction of tissue. It may occur in 
any organ or tissue of the body and nearly if not all species of animals 
are susceptible to it. In the internal organs the necrotic areas usually 
remain quite firm and on microscopic examination B. necrophorus 
may be found in greater or less numbers. 
History. This organism was first observed by Koch in 1881. It 
was later isolated and studied by Loeffler who found it to be the 
probable cause of the condition designated by Dammann as calf 
diphtheria. Bang called attention to its ability to produce a coagula- 
tion necrosis which led him to give it the name of Necrobacillus. 
In 1876 Dammann published the results of his investigation of caseo- 
necrotic inflammation of the mouth, throat and upper air passages of 
young calves. The appearance of the lesions was similar to that of 
diphtheria in man. Schiitz working with Bang on a severe epizodétic 
generally known at that time in Denmark as swine diphtheria, found 
in the caseous inflammations of the intestines long thread-like bacilli 
which he considered to be the cause of the deeply penetrating intes- 
tinal necrosis. He called it Bacillus filiformis and thought it was 
identical with the microérganism of calf diphtheria. He believed it 
to be the cause of all the caseous necrotic lesions occurring in the 
intestine in cases of hog cholera. In his work on hog cholera, Smith 
refers to “large bacilli following the course of the blood vessels in the 
