SUMMARY: Urease is a constituent enzyme of and appears to account for the bulk of its ammonia production. also contains an arginase and some amino-acid deaminases, but the former has not been fully characterized. Bovine urine supports the growth of a small inoculum of for a limited time but after growth has reached a maximum it diminishes rapidly and the ammonia and pH values increase. also contains uricase but its precise significance has not yet been determined.

Of the other bacteria studied, has urease activity similar to , and a stronger initial arginase. contains no appreciable urease or arginase, although it tends to form ammonia from glutamine.


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