CERTAIN GENERA OF THE CLOSTRIDIACEAE 31 



When surface methods of isolation are followed this type of 

 organism is very difficult to remove from cultures of other anae- 

 robes. The Committee emphasize this point. I have had no 

 more contaminations by sporogenes than bj^ aerobes and by 

 various other anaerobes. The organism is common in nature 

 and gains entrance to pure cultures occasionally. 



Genus 26. Wcinbergillus nov. gen. 



Highly proteolytic Putrificoideae that in meat medium cause 

 the formation of balls of amino-acid crystals. They digest the 

 meat particles till their bulk is greatly reduced and form large 

 amounts of ammonia, amino-nitrogen and fatty acids. They 

 digest the casein in milk rapidly. Attack few or no sugars. 

 Produce little or no gas in agar media. Gram-positive or Gram- 

 ,negative rods with sub-terminal oval spores. Colonies in deep 

 agar small, delicate woolly structures. May invade living 

 tissue in company with other organisms, or at times alone, pro- 

 ducing a rapid and complete digestion of muscular and con- 

 nective tissue structures. 



Type species TT^. histolyticus (Bacillus hisiolyticiis Weinberg 

 and S^guin) as described by Henry (p. 370) . Weinberg and S^guin 

 and the Committee allow considerable variation in characters 

 for the strains termed by them Bacillus histolyticus. 



It is possible that B. sporogenes-parvus of Choukevitch may 

 belong in this genus. Wolf and Harris (1918) have made a 

 chemical study of what is probably the type strain — they re- 

 ceived it from Henry who received it from Weinberg. 



REFERENCES 



AcRALME, P. 1891 Examen bact^riologique d'un cas de rhumatisme artieulaire 

 aigu mort de rhumatisme c(Sr6bral. Compt. rend. Soc. Biol., 43, 651. 



AcBALME, P. 1902 Recherches sur quelques bacilles ana^robies et leur diffe- 

 rentiation. Ann. de I'Inst Past., 16, 633. 



Adamson, R. S. 1919 On the cultural characters of certain anaerobic bacteria 

 isolated from war wounds. Jour. Path, and Bacteriol., 1918-19, 22, 

 345. 



Adamson, R. S. 1920 On the cultivation and isolation of Bacillus tetani. 

 Ibid., 23, 241. 



