638 



STATE BOARD OP AGRICULTURE. 



TABLE VIII.— HISTORY OF MILK FROM A COW THAT HAS ABORTED. 



(Agglutination reaction at middle of milking, when various quantities of milk were added to test tubes 



containing bacterial suspension.) 



(a) Guinea pigs inoculated intra-abdominally with milk from each quarter had typical Bad. abortus 

 lesions and blood reactions. 



(b) Aborted an 8 months foetus. 



In Table IX is given the record of milk from a cow that has never 

 aborted. On Jnne IG, 1915, agglutinins had appeared in all but the left 

 front quarter. Guinea-pig inoculations made on June 30 were positive 

 for infectious abortion in all but the left front quarter. On October 16, 

 1915, the reaction had spread to the left front quarter. 



TABLE IX.— HISTORY OF MILK FROM A COW THAT HAS NEVER ABORTED. 



(Agglutination reaction at middle of milking, when various quantities of milk were added to test tubes 



containing bacterial suspension.) 



(a) Guinea pigs inoculated intra-abdominally with milk from each quarter had typical Bad. abortus 

 lesions and blood reactions, with exception of left front quarter, which was normal. 



When the antibodies for Bad. ahortus were found present in the milk, 

 especially in great concentration this organism was usually found also. 

 That the organism was not always found when the antibodies were 

 found the writer thinks may be due to the fact that the infection was 

 disappearing or was so slight that there Avere not enough organisms 

 present to cause the disease in guinea pigs with the 5 cc. of milk used 

 for inoculation. 



In Table X will be found the record of milk that had a positive anti- 

 body content but in which Bad. ahortiis was not demonstrated by guinea 

 pig inoculation. 



