74 B. BRADLEY. 



SOME OBSERVATIONS ON THE BIO-OHEMIOAL 



CHARACTERISTICS OF BACILLI op the GAERTNER- 



PARATYPHOID-HOG CHOLERA GROUP. 



By Burton Bradley, m.b., okm., m.r.c.s. Eng., l.r.c.p., d.p.h. Lona., 

 Assistant Microbiologist, Bureau of Microbiology, 

 Honorary Pathologist to St. Vincent's Hospital, 

 Sydney. 



(From the Laboratory of the Government Bureau of Microbiology.) 



[Read before the Royal Society of N. S. Wales, June 5, 1912.^} 



Introduction. 

 This paper is the result first of all of a systematic attempt 

 to classify the very numerous cultures stocked in the Bureau 

 of Microbiology, which were, by preliminary tests, found 

 classifiable under the "Gaertner" group of coliform bacilli, 

 that is to say, bacilli which are closely allied to the normal 

 inhabitants of the intestine of man, and other animals, 

 the colon bacilli, but which though forming gas from various 

 carbohydrates as do these colon organisms, yet differ 

 notably by their failure to ferment lactose and saccharose 

 and by their action on milk, and which have very special 

 relationships with certain definite pathological conditions 

 in men and animals. 



For the purpose of this classification I have made use, 

 in the present contribution, entirely of the biochemical 

 tests which attempt to orientate an organism by means of 

 its mode of action on a series of test chemical substances 

 familiarly known as the "sugars." 



In this paper I have shown that organisms of the Gaertner 

 group recovered from cases of paratyphoid fever — from 

 cases of food poisoning — from cases of yellow fever in man 



