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OIDIUM LACTIS. 



DOES NOT BELONG TO THE BACTERIA, BUT IS A SIMPLE MOULD. 



Origin. Almost invariably present in milk and in 

 butler. 



Form. A delicate white mycelium of wavy threads. 

 No special fruit organ. Large oblong spores. 



Anilin Dyes. Eeact readily. 

 Growth. Rapid. 



Gelatin Plates. Delicate white stars form, which rapidly enlarge, and on 

 the surface spread as flat, whitish, dry masses. Under the microscope the 

 colonies show radiating branched hyphse. 



Stich Cultures. Growth takes place along the entire line of inoculation, 

 but most abundantly at or near the surface. A branching network of threads 

 extends outward into the solid gelatin. On the surface a grayish white, dry, 

 low growth forms. In old cultures only the upper layer of gelatin shows the 

 radiating lines. 



Streak Cultures. On agar, it forms a grayish white, thin growth. 



Milk. Growth occurs without any change in its composition. 



Temperature. Grows best at ordinary temperature. 

 Can grow in inc.ubator. 



Behavior to Gelatin. Does not liquefy. 

 Pathogenesis. No effect on animals. 



