8 QUATERCENTENARY STUDIES IN PATHOLOGY 



— pigeons by intramuscular injections. Kovdrzik considers that his 

 bacillus is most nearly related to Lochmann's B. caseolyticus. 



Lochmann (3) has described a bacillus which, he believes, is closely 

 related to B. coli, and which he isolated from 4 guinea-pigs dead of 

 experimental tuberculosis. Culturally and morphologically it resembled 

 B. coli. It differed, however, from the typical colon bacillus in the 

 production of alkalinity in milk, by the absence of the indol reaction and 

 by its pathogenicity for animals by feeding. Greyish-white deposits were 

 frequently observed in the liver and spleen of experimental animals. It 

 is very probable that Lochmann's bacillus is identical with those 

 referred to above, and that it would be more accurate to place it in the 

 B. enteritidis group, and indeed Lehmann and Neumann, in their hand- 

 book, have adopted this course. 



Before proceeding to discuss the lesions produced by other members 

 of the group it may be of interest to record a few cases in which a similar 

 organism was encountered during the ordinary routine work of the 

 laboratory. 



I. — Mus decumanus brought to the laboratory dead. 



From the heart-blood of a mus decumanus brought dead to the 

 laboratory for examination, a culture was obtained of two kinds of 

 colonies. Subcultures of the predominating colonies yielded a bacillus 

 corresponding in all the tests applied to the B. enteritidis. The post 

 mortem examination revealed evidences of an acute disease, the spleen 

 being very large, soft and deeply congested ; the peripheral glands were 

 enlarged ; the serous membranes were injected, and there were haemorr- 

 hages in the epicardium. There were signs of commencing putrefaction 

 in the organs. No animal test was performed. 



II.— Mus decunnanus brought to the laboratory dead. 



Naked-eye appearances — 



Nothing pathological was seen, except that the lungs were congested, 

 and showed haemorrhages. The abdominal organs showed signs of 

 putrefaction. 



(294) 



