Ornithine Decarboxylase Test Report

The Results from the Gram positive tests indicated that the unknown #4 was Streptococcus pyogenes. All seven tests on the unknown matched S. pyogenes perfectly. The blood agar plate proved the unknown to be β hemolytic, meaning the unknown bacteria was capable of complete hemolysis. This test separated the unknown into the β Streptococcus group, narrowing the possible bacteria to S. aureus or S. pyogenes. The Catalase test was used to determine if the unknown could break down hydrogen peroxide. The unknown bacteria was unable to break down the hydrogen peroxide, meaning it was catalase-negative. This result from this test correlates with the S. pyogenes and is in contradiction with S. aureus, a strong indication that the bacteria is in fact S. pyogenes. The Coagulase test was used to determine if
The results show that the unknown and E. aerogenes were positive for this test while P. aeruginosa was negative. Results for P. vulgaris were negative for this test, but this bacteria can show positive or negative for the Ornithine, The lactose fermentation test (MAC) showed that the unknown was positive for lactose fermentation. Expected results showed that all bacteria should have been positive for this test. However, the test on P. vulgaris during the experiment was negative, defying expected results. The oxidase test was used to test for the presence of cytochrome c in the unknown. The unknown was shown to be oxidase negative which matches with the results for E. aerogenes. The results for P. aeruginosa were positive, making this bacteria less likely to be the unknown. The results for P. vulgaris were negative, matching expectations for this bacteria. The final test was the SIM agar test. The unknown was negative for motility, indole, and H2S. These results almost match perfectly with E. aerogenes, but the motility of this bacteria was shown to be