G14 STATE BOARD OF AGRICULTURE. 



ting. of the sexual hairs observed, in which instances the matting could 

 not be attributed to Bact. ahortus. 



CONCLUSIONS. 



Agglutinating and corapleuient fixing bodies for Bact. ahortus are 

 very rarely demonstrated in the blood of calves as a result of ingesting 

 naturally infected milk. 



Calves may give a positive reaction to the complement fixation test 

 immediately after birtli. The reaction probably signifies a pre-natal 

 infection. 



There is favorable evidence that antibodies circulating in the body 

 of the mother are not transmitted to the fetus in utero. 



The data strongly emphasize the necessity of testing the blood of 

 calves at birth in order to differentiate between positive reactions that 

 may be due to the ingestion of milk and positive reactions that may be 

 present at birth. 



There appears to be no connection, whatever, between the feeding of 

 milk and the matting and staining of the sexual hairs of new born calves. 



REFERENCES. 



1. Schroeder, E. C. and Cotton, W. E. The Bacillus of infectious abor- 



tion found in milk, 28th Keport Bureau of Animal Industry, p. 

 134-183, 1912. 



2. Evans, Alice C. The bacteria of milk freshly drawn from normal 



udders. Jour. Infect. Disease. Vol. 18, Ko. 5, pp. 437-47G, 191G. 



3. Cooledge, L. H. Agglutination test as a means of studying the 



presence of Bact. abortus in milk. Jour. Agri. Research, Vol. 5, 

 No. 19, pp. 871-875, 191G. 



4. Williams, W. L. Researches upon contagious abortion in Cattle. 



Report of New York KState Vet. College, pp. 03-101, 1914-15. 



5. Pfoundler, M. Die Antikorperiibertragung von Mutter auf Kind, 



Arch f. Kind, S. 2G0-28G, 1907. 

 G. Marshall, F. H. A. Physiology of Reproduction, pp. 435-43G, 1910. 



7. Cooledge, L. H. Is Bact. alortus (Borg) pathogenic for human be- 



ings? Jour. Med. Research, Vol. 34, No. 3, pp. 459-467, 191G. 



8. Talamon and Castaigne. Obstetrique, Paris, cf. ibid., p. 58, 1898. 



