OIDIUM 



1095 



Remarks. — -It was found by Link in milk and recently by 

 Linossier in cases of bronchitis. The latter was considered to be 

 slightly different and to form a pathogenic race, Oidium lactis 

 var. A. 



Oidium rotundatum Castellani, 1911. 



Definition. — Oidium growing on glucose agar and producing 

 crinkled or verm if ormj: yellowish growths. It gives rise to acidity 

 jn milk, and after a variable time may form a clot. Gelatine is 



Fig. 573- Fig. 574. 



Figs. 573 and 574. — Oidium rotun- 

 datum Castellani. Culture. 









1 































mm '> 













Fig. 575. — Oidium asteroides 

 Castellani. Culture. 



liquefied, but liquefaction may be extremely slow or absent with 

 certain strains. For the sugar reactions see the table (p. 1094) . It 

 forms acid in glucose, levulose, galactose, maltose, and lactose. 



Remarks. — -Found in cases of bronchitis and a very similar or 

 identical form in the faeces of cases of sprue and of enteritis. 



Oidium asteroides Castellani, 1914. 

 Definition.- — ^Oidium producing colonies with a characteristic 

 radiating appearance on glucose agar, from which it derives its 

 name. It grows badly or not at all upon inspissated blood serum, 

 which it does not liquefy. It turns milk acid and clots it in a 

 variable time. No gas is formed in any carbohydrate medium. 



