184 EXPERIMENT STATION RECORD. [Vol. 40 



Ann. Ig. [Rome], 28 (1918), No. 5, pp. 233-237).— Observations are reported 

 leading to the conclusion that the rabic virus of dogs naturally infected can be 

 transmitted to the fetus by filtration through the maternal plasma. This filtra- 

 tion, at least in dogs, does not produce an attenuation of the virulence of the 

 virus. 



Recent aspects of streptococcus infection, F. P. Gay (Jour. Lab, and Clin. 

 Med., 3 (1918), No. 12. pp. 721-757).— This review of tbe present status of 

 knowledge of streptococcus infection includes a bibliography of six pages, 

 arranged alphabetically by authors. 



An experimental study of serum therapy in trichinosis, M. C TIat.t. and M. 

 WlGDOB {Arch. In1. Med.. 22 (1918), No. 5, pp. 601-609).— •" Our experiments 

 bear <>ut the conclusions of Schwartz I K. S. II.. 37, p. 7S41 to the effect that 

 serum from animals convalescent from trichinosis, when injected into other ani- 

 mals or fed to them mixed with trichinous meat, does Dot inhibit the customary 

 development of trichina 1 . 



"On the other hand, theoretic considerations, tbe clinical observations of 

 Salzer, 1 and the longevity data from our experiments lead us to the conclusion 

 that such a serum may be of decided value In combating tbe toxic features 

 of trichinosis, a conclusion which is in general agreement with Salzer's belief 

 in the value of such a serum." 



Further studies on Bacterium abortus and related bacteria. — III. Bacterium 

 abortus and related bacteria in cow's milk. Alice C. Evans {Jowr. Infect. 

 Diseases, 23 (1918), No. !,. pp. .854-372).— This is a report of studies by the 

 Dairy Division of the U. s. Department of Agriculture, carried on In continua- 

 tion of those previously noted (E. S. 11.. 30. p. 2S0). 



" B. lipolyticvs and other abortUS-llke bacteria were isolated from the milk 

 of 10 of 124, or 41.7 per cent, of cows which had not aborted. The cows he- 

 long to a herd in which there was an occasional abortion, but no general out- 

 break. Tbe same kinds of bacteria were isolated from the milk of 100 per cent 

 of 12 cows which bad aborted as a result of natural infection. B. UpolytiOUS 

 was cultivated from the milk of 66.6 per cent of these cows, and other ahortus- 

 Uke bacteria were cultivated from the milk of B0 per cent of them. 



"Typical virulent strains of li. abortus could not be isolated from the milk 

 of either of the groups mentioned above. Typical B. abortus was found to be 

 present In very large numbers in the milk of two cows that had been re- 

 peatedly Inoculated with a mixture of strains of that organism. It was found 

 only once, in rather small numbers (450 per CC.), in the milk of a cow which bad 

 aborted after being inoculated once with the same mixture of strains of 

 B. abortus. It was not found in the milk of another cow which aborted after 

 receiving one inoculation. The data indicate that virulent strains of It. 

 abortus are not eliminated continuously in large numbers In the milk of cows 

 which have aborted, even though the blood serum continues to react posi- 

 ti ely to the agglutination test 



"^The characteristics of B. UpolytiOUS and other abortus-like bacteria are 

 described, and their relation to the typical B. abortus is discussed. The possi- 

 bility that some of these strains may cause abortions in those cases in which 

 the blood serum reacts negatively to B. abortus antigen Is also discussed. 



"The bacterial flora of the udders of a herd in which there existed an out- 

 break of abortions was found to be abnormal in the large number of Udders 

 which were infected with streptococci, and it was also abnormal in showing 

 a general infeclon with a streptothrix. Abortus-like bacteria were found in 66.6 



»Jour. Amcr. Mod. Assoc, 67 (191G), No. 8, pp. 579, 580. 



