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Scientific Proceedings (129) 



by its morphological appearance and its manner of growth. The 

 failure of B. pnenmosintes to produce gas does not help in the 

 differentiation since the bacterium we are describing frequently 

 fails to show gas. I do not believe the cooked meat medium was 

 used by Olitsky and Gates. (2) It is filterable through tested 

 filters. Olitsky and Gates do not give any method by which their 

 filters were tested. (3) It is found in the oral cavities of man 

 and rabbits, and thus could lead to confusion with B. pneumo- 

 sintes from these sources. (4) Comparable experiments to those 

 done by Olitsky and Gates will have to be carried out to deter- 

 mine whether this common, extremely small anaerobe will alter 

 the blood picture after intratracheal injection, or lower the re- 

 sistance of the lung to secondary invasions by other common 

 micro-organisms of the respiratory tract, or will show any sero- 

 logical or other relationship to B. pneumosintes. 



135 (2095) 



Anaphylactic reactions in isolated canine organs. 

 By W. H. MANWARING, R. C. CHILCOTE, and V. M. HOSEPIAN. 



[From the Laboratory of Bacteriology and Experimental Path- 

 ology, Stanford University, California.] 



If the isolated organs of horse serum sensitized dogs are per- 

 fused with Locke's solution containing 0.5 to 1 per cent, horse 

 serum, the following reactions are observed : 



(a) Hind quarters: Slight increase in perfusion resistance, 

 reducing the rate of perfusion flow about five per cent. No 

 demonstrable edema, except on genitalin (female). 



(b) Intestines: Increased perfusion resistance, reducing the 

 perfusion flow about twenty-five per cent. Increased peristaltic 

 movements; distinct edema of intestinal wall; increased volume 

 of intestinal contents. 



(c) Liver: Increased perfusion resistance, reducing the per- 

 fusion flow about twenty-five per cent. Distinct hepatic edema. 



