IDENTITY OF AMERICAN AND FRENCH SPOROTRICHOSIS 105 



prow in the soil, in water, and under other conditions ; certain 

 varieties are pathogenic for plants. 



Infection with varieties pathogenic for man, excepting the 

 two here under consideration, are apparently very rare. The 

 following are mentioned in this connection. 



Sporotrich-um don, an organism isolated from a human case 

 and very imperfectly described by Dor in 1906, was evidently 

 a different organism morphologically, culturally, and in. its 

 pathogenicity for animals. The culture has been lost and 

 iio similar organism has since been found. 



Sporotrichum indicum, an organism described by Castellani 

 in 1908, was isolated from two cases of sporotrichosis in Cey- 

 lon. It is impossible now to compare them with other varie- 

 ties since these cultures have also been lost. From the orig- 

 inal description given by Castellani it is clear that the or- 

 ganisms are very similar to, if not identical with, the French 

 and American varieties. He says that "it closely resembles 

 Sporotrichum beurmanni; the mycelial threads are somewhat 

 larger, between 2 and 3 microns wide; spores roundish (3 

 to 5 microns in diameter) or oval (4 to 5 microns long and 3 

 to 4 microns in breadth). Colonies on maltose agar may be 

 of various colors, greyish, light brownish, dark brownish, 

 black". 1 There arc no differential characteristics here that are 

 important and I am inclined to believe these strains are identi- 

 cal with the American variety of Schenck. De Beurmann 

 and Gougerot provisionally classify it as Sporotrichnm 'beur- 

 manni var. indicum. 



Sporotrichum gouyeroti is an organism isolated from a case 

 in France by Gougerot who thought it different from the 

 Beurmann type in several respects, chiefly in macroscopic 

 growth and pigment production. De Beurmann and Goug- 

 erot observed one case only. 



The Sporotrichiim jeunselmei was isolated by Jeanselme and 

 Chevallier in 1910 from a human case and a second case 

 appeared as an experimental infection accidentally obtained 

 in the laboratory from the culture of the first case. According 

 to de Beurmann and Gougerot this organism is very similar 



Castellani & Chalmers, Manual of Tropical Medicine, I^onclon, 1910. 



