Abstract
Discussion and summary
In order to render the x-ray film liquefaction test by fecal specimens more informative it is highly desirable to be able to differentiate between gelatin liquefaction due to the activity of pancreatic trypsin and that due to the action of bacterial enzyme. Soybean trypsin inhibitor, which prevents the liquefaction of gelatin (x-ray film) by crystalline trypsin and trypsin in feces, fails to inhibit gelatin liquefaction by various bacteria, including Proteus ammoniae, Proteus morganii, and Pseudomonas aeruginosa. Suitable preparations of zinc oxide, zinc peroxide, and sodium perborate have no or only a slight effect on trypsin in feces but markedly inhibit the bacterial enzyme responsible for gelatin liquefaction.
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