Can you help me do 3, 4? Thanks. 3. The Microbiology Lab performed the following

Question

Can you help me do 3, 4? Thanks.

3. The Microbiology Lab performed the following blochemical tests on isolated colonles plates. The results from the tests are listed below: Nutrient broth grown at 35oC- turbid Nutrient broth grown at 4oC-not turbld Oxidase test-colony turns black Nitrate test-broth is turbid and turned red after addition of reagents to test for reduction of nitrate Phenol red Glucose fermentation broth-turbidity and yellow color, no bubble in durham tube Phenol red Lactose fermentation broth-turbidity and red color, no bubble in dirham tube Phenol red sucrose fermentation broth-turbidity and turned yellow, no gas in durham tube VP test-broth is turbid and has red color at the top after adding reagents 4. Using the biochemical tests in #3, what organism (Genus and species) is causing the infection?

Explanation / Answer

Serratia marcescens is the organism causing infection

Biochemical characteristics of Serratia marcescens

Oxidase test: Negative

Nitrate test: Positive

VP test: Positive

Glucose fermentation: Positive fermentation but no gas formation

Lactose fermentation: Negative

Sucrose fermentation: Positive fermentation but no gas formation

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.