364 SUMMARY OF CURRENT RESEARCHES RELATING TO 



of growth upon solid gelatin. The author gives a table showing the 

 morphological, cultural and pathogenic characters of this and other or- 

 ganisms which are pathogenic for laboratory animals. 



Morphology of Cholera Vibrios in Peptone Solutions of Different 

 Reactions.* — Y. K. Ohno observed that the shape of these organisms 

 varied according to the reaction of the peptone solution in which they 

 grew. The typical vibrio form was found in alkaline solutions of strength 

 from 0*5 to 1*3 p.c ; the exact point was different in different strains. 

 In more acid solutions rod forms were found, and in more strongly alkaline 

 solutions the organisms were of a cocco-bacillary type. In view of this 

 variation in point at which the organisms were found to be most typical, 

 the author suggests that in the routine examination of suspected stools, 

 three peptone solutions of reaction, • 3 p.c. acid, " 5 and 1 ■ 3 p.c. 

 alkaline, should be employed. 



Antagonism of Bacillus bulgaricus and Bacillus diphtheriae.t — In 

 this preliminary note, G. Rosenthal contributes to the study of the scien- 

 tific basis of bacterio-therapy. As blood-serum, the most favourable 

 medium for the diphtheria bacillus, is unsuitable for the Bulgarian 

 bacillus, while milk has a converse effect, the author used milk-serum, 

 which contains two parts of skimmed milk and one of serum, for his 

 experiments. He found that when these organisms were planted at the 

 same time upon milk-serum they could both be recovered by sub-culti- 

 vation up to the end of the fourth day. After that time the Bulgarian 

 bacillus survived alone. Secondly, if the B. diphtherise was planted on 

 a culture of B. bulgaricus it failed to gain a footing. The latter or- 

 ganism remained uncontaminated. But if the Bulgarian bacillus was 

 planted upon a culture of the diphtheria bacillus the latter organism 

 disappeared after a week. Lastly, he found the diphtheria bacillus 

 could grow easily upon dead cultures of the lactic acid bacillus, and, if 

 the acidity were carefully neutralised, upon living cultures also. 



New Bacillus of Fowl-septicaemia.:}: — From a number of fowls, 

 victims of a wide-spread epizootic in Calcutta, G. C. Chatter jee has 

 obtained an organism which, in its artificial culture and its pathogenic 

 properties, resembles the bacilli of the hemorrhagic septicemia group. 

 On the other hand, its morphological characters are peculiar. It is a 

 minute coccus or cocco-bacillus, much smaller than a staphylococcus. 

 It is Gram-negative and non-motile. The author assigns it, however, to 

 the above group. From cultures, a vaccine was prepared which pro- 

 tected healthy fowls. 



New Anaerobic Streptococcus.§ — From a case of gangrene of the 

 lung, G. Repaci has obtained a new streptococcus, to which he has given 

 the name Streptococcus parvulus non liquefaciens. This organism occurs 

 in chains of four to eight individuals ; it is a strict anaerobe, and is Gram- 

 positive. It grows on glucose-agar, gelatin and broth, under anaerobic 

 conditions ; gelatin is not liquefied ; in broth culture, the growth is 

 sedimentary. It does not ferment sugars, but milk is coagulated in 



* Philippine Journ. Sci.,iv. (1909) pp. 341-52. 

 t C.R. Soc. Biol. Paris, lxviii (1910) pp. 349-51. 

 J Ceutralbl. Bakt., lte Abt. Orig., liv. (1910) pp. 1-4. 

 § C.R. Soc. Biol. Paris, lxviii. (1910) pp. 292-3. 



