456 ACTINOMYCETES. 



of this form appears to be as a variety of Act. chromogenes. According 

 to Gasperini, this form may cause actinomycosis in cattle. 



Actinomyces violaceus. (Rossi Doria.) Gasperini. 



Found many times in Rome by Doria. It liquefies gelatin. The 

 nutrient media are discolored. Gelatin becomes bright wine-red, agar 

 grayish-violet, potato reddish-brown. 



Streptothrix aurantiaca, citrea, albido-flava have been described 

 by Rossi Doria (I. c), and their standing as species must be proved 

 by further comparison. According to Gasperini, they are all to be 

 considered as actinomyces. 



Lachner-Sandoval (I. c.) has studied in detail the Actinomyces 

 albido-flavus Gasp. He describes the germination of the conidia as 

 accompanied by elongation, many times following two directions simul- 

 taneously. The vegetative forms were killed by 70° in three minutes; 

 the conidia by 80° in five minutes. 



A ' ' streptothrix ' ' which is not acid-proof, and which possesses 

 pathogenic properties for animals, was isolated by Rullmann from 

 sputum (Munch, med. Wochenschr., 1898, 919). Upon Loffler's serum 

 it furnished chrome-yellow growths, otherwise they were colorless. 

 Often the cultures give off a moldy odor. 



Actinomyces erysipeloid is. (L. and N.) Lachner- 

 Sandoval. 



Synonyms. — Oospora erysipeloidis L. and N., Strep- 

 tothrix Rosenbachii Kruse. 



As the cause of the rare sporadic disease, chronic ery- 

 sipelas, erythema migrans, "erysipeloid" of Rosenbach, 

 the latter author has described a true branching micro- 

 organism, related to the ' ' cladothrix, ' ' but often occurring 

 in the form of short rods and spheres. The threads often 

 terminate in "a thick point." The description of the 

 cultures reminds one most of mouse septicemia. In all 

 growths they become brownish. It grows best at about 

 20°, less well at incubator temperature. When inoculated 

 into man, it causes non-febrile, intensely itching, sharply 

 outlined redness, which spreads slowly. 



Actinomyces necrophorus. 1 (Fliigge.) L. and N. 



Bacillus of diphtheria in calves (Mitteil. des Kais. Ges. 

 Amts., n). Bac. diphtheriae vitulorum Fliigge and B. 



1 Since Fliigge gave both the above names simultaneously, we are 

 free to choose between them. The species designation of " necropho- 

 rus " seems to us to be especially happy. 



