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MTJCOR, CORYMBIFER. Lichtheim. 



THE MOST COMMON AND WIDELY DISTRIBUTED MUCOR IS MUCOR 

 MUCEDO, OCCURRING ON EXCRETA, ETC. 



Origin. Is of rare occurrence, and was found as a 

 contamination on bread-gelatin plates. Is present in white 

 bread, and has been found in the ear-passages of man. 



Color. Forms a snowy, cotton-like growth. 



Mycelium. Loose, wavy, branching, slender mycel- 

 ial threads. 



Fruit-organs. The fruit hyphae branch forming 

 clusters or corymbs which terminated with spherical or 

 pear-shaped sporangia. Within these are the oval or 

 elongated spores. 



Growth. Rapid and extensive. 



Bread flasks. In the incubator forms a white, elevated, cotton-like 

 growth which soon fills the flask. 



Temperature. Grows slow at ordinary tempera- 

 ture; best at 37 C. 



Pathogenesis. Intravenous injection of the spores 

 into rabbits produces death in 3 to 4 days. The kidneys, 

 mesenteric glands, Peyer's patches contain mycelial 

 masses. The Peyer's patches are swollen and ulcerated. 

 Intraperitoneal injections produce the same results. 

 Dogs are immune. 



