Propionibacterium acnes would likely test positive for triglyceride hydrolysis, as it lives on skin which contains oils. Helicobacter pylori would likely test positive for urea hydrolysis. H. pylori lives in the acidic stomach environment and breaking down urea would help neutralize the pH and aid the pathogen's survival. The document asks about which of five hydrolysis tests - starch, casein, triglyceride, tryptophan, and urea - two bacterial pathogens would likely test positive for, based on their environments in the body.

1. For which of the five hydrolysis tests (starch, casein, triglyceride, tryptophan and urea) would a
positive test result be expected for the following pathogens?
i. Propionibacterium acnes, the etiological agent for acne usually seen in people with excess skin
oil
secretion. Please explain.
ii. Helicobacter pylori, the etiological agent for gastric (stomach) ulcers. Why would this activity
be
important for the pathogens survival in this environment (pH=2)?
For which of the five hydrolysis tests (starch, casein, triglyceride, tryptophan and urea) would a
positive test result be expected for the following pathogens?
i. Propionibacterium acnes, the etiological agent for acne usually seen in people with excess skin
oil
secretion. Please explain.
ii. Helicobacter pylori, the etiological agent for gastric (stomach) ulcers. Why would this activity
be
important for the pathogens survival in this environment (pH=2)?