572 A MANUAL OF BACTERIOLOGY 



ulcerate. Potassium iodide has a curative action on the 

 condition. 



In the pus of the lesions large ovoid retractile bodies 

 suggestive of yeasts or of large spores may be detected, 

 but no mycelium. 



Cultures are best obtained on maltose agar, from non- 

 ulcerated lesions ; agar and potato may also yield 

 growths. The organism (Sporotrichum Beurmanni) grows 

 as small raised woolly colonies, at first white, afterwards 

 becoming brown. The growths consist of a felted 

 mycelium of filaments with spores and yeast-like cells. 

 It produces granulomata in inoculated mice. The 

 botanical position of the organism is uncertain ; by some 

 it is regarded as a true fungus. It is stated to occur on 

 decaying vegetable matter and to be the cause of epizootic 

 lymphangitis in the horse a disease having a superficial 

 resemblance to farcy in the pus of which oat-shaped 

 bodies are found, the " cryptococcus " of Rivolta. 



Accladiosis is an ulcerating dermatomycosis occurring 

 in Ceylon and elsewhere in the East, and somewhat 

 resembling sporotrichosis. The fungus was isolated by 

 Castellani l and is named Acdadium castellanii. 



Thrush 



Thrush is due to an organism (O'idium or Monilia albi- 

 cans) which is usually classed among the Hyphomycetes. 

 There are probably several species distinguished by their 

 fermentation reactions (Castellani). It forms the whitish 

 patches so frequently seen on the mucous membrane of the 

 mouth and pharynx in children and in those suffering from 

 wasting diseases, it also causes bronchitis, and a general 

 infection has occasionally been produced by it. If one 

 of these patches is removed and teased up, it will be found 



1 See Proc. Hoy. Soc. Med. (Dermatolog. Sect.), 1917. 



