410 VETERINARY BACTERIOLOGY 



by 3 to 4 it in diameter. The mycelium may be quite luxuriant 

 in the skin. 



Pathogenesis. The disease is characterized by the formation 



Fig. 184. Achorion schoenleinii, section showing the hyphae (Friinkel and 



Pfeiffer). 



of scales upon the skin, often accompanied by a disagreeable odor. 

 It may be communicated from one species of animals to another. 



Oi'dium albicans 



Synonym. Monilia Candida. 



Disease Produced. Thrush in infants; sometimes in the young 

 of animals. 



Berg, in 1840, described this organism as the cause of thrush. 

 It has since that time been repeatedly isolated and cultivated. 

 It is known from most civilized countries. 



Morphology. The mycelium of this organism is poorly de- 

 veloped; frequently the whole growth consists of budding yeast- 

 like cells. These may be spherical, elliptical, oval or cylindrical, 

 the shorter cells about 4 p in diameter by 5 to 6 ^ in lengt h. The 

 hyphal threads are much longer. There can be little differentia- 

 tion in many cases between the conidia and the cells of the hyplue. 

 but, on artificial media, the conidia are frequently definitely ad- 



