206 INFECTIOUS ABORTION IN CATTLE 
Schreiber reports good results in the production of immunity with 
an extract of the Bang organism. He points out also the necessity 
for great care in cleanliness and thorough disinfection. 
Mohler and Traum found that cows rarely abort more than twice 
or three times, after which they develop a tolerance or immunity to 
the infection. 
Bang carried out many experiments for immunizing cattle against 
abortion with both living and killed cultures. His results were in 
part favorable and in part unsatisfactory. He considers the best 
method to combat the disease is isolation and disinfection. 
Olaf Bang reports a large number of immunizing experiments with 
various serums and vaccines made by veterinarians, in Denmark, 
not reported in our literature. The results were variable, some being 
favorable and others not. The use of vaccines has thus far been un- 
satisfactory. 
In Norway infectious abortion is scheduled under the so-called 
“‘milder contagious diseases.” The owner is obliged to report when 
such a disease appears in his herd, and he is not allowed to bring such 
animals to fairs or cattle shows. 
REFERENCES 
1. Ascott. Uber die Reinziichtung des Bangschen Bacillus. Zeit. f. hyg. u. infek:, 
Bd. LXXV (1913), S. 172. 
2. Batt. Uber die Agglutinationswirkung des normalen Rinderserums. Cent. f. 
bakt. paras. u. infek., Bd. LI (1909), S. 170. 
3. Banc, B. Das seuchenhafte Verwerfen der Rinder. Arch. f. wiss. u. prak. 
Tier., Bd. XX XIII (1907), S. 312. 
4. Bane. The etiology of epizodtic abortion. The Jour. of Comp. Path. and 
Therap., Vol. X (1897), p. 125. 
5. Bane. Infectious abortion in cattle. The Jour. of Comp. Path. and Therap., 
Vol. XIX (1906), p. 191. 
6. Beurantr. Uber den Wert einiger neuer Diagnosemittel beim infektidsen 
Abortus. Zeit. f. Infek. para. Kran. u. Hyg. d. Haust., Bd. XII (1912), S. 1. 
7. Cuester. 7th Annual report, Del. Agric. Exp. Station. 
8. Corron. The persistence of the bacillus of infectious abortion in the tissues of 
animals. Amer. Vet. Rev., Vol. XLIV (1913), p. 307. 
9. Datrympie. Bulletin No. 10, 2d Series, La. Agr. Exp. Station, 1891. 
10. Desmonp. An outbreak of epizodtic abortion in cattle. Amer. Vet. Rev., 
Vol. XLII (1913), p. 604. 
11. Fasyan. A contribution to the pathogenesis of B. abortus, Bang. Jour. 
of Med. Research, Vol. XXJ (1912), p. 441. 
12. Fasyan. The persistence of B. abortus, Bang, in the tissues of inoculated 
animals. Jour. of Med. Research, Vol. XXVIII (1913), p. 81. 
13. Fasyan. A note on the presence of B. Abortus in cow’s milk. Jour. of Med. 
Research, Vol. XXVIII (1913), p. 85. 
