You have isolated a Gram positive cocci from a throat culture. You have determined that it is catalase negative and is beta hemolytic. What test should you perform next to help identify it?
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- If an unknown bacteria was given that was gram-positive coccus, and the catalase test was performed, what can be determined from the result of the test?What would be the expected out come of a gram staining test If the bacteria is a pathogenic intestinal bacteria?in the clinic, the acid-fast stain is used to diagnose infection with which bacterium?
- After the original specimen has been plated and a reported gram-negative rod was seen on the initial gram stain, what is your initial assumption of the organism causing this disease?When using Endo agar as the selective and differential media for the confirmed test, how would you know whether the test is positive for the presence of coli?What test can help you differentiate staphylococci from streptococci? What reagent or media would be use? short answer only
- Is the Triple-Sugar Iron Agar (TSIA) a complex or defined medium? Explain based on its composition. Is the test tube a A) broth, B) slant, or C) deep agar medium? Why is a “needle” used to inoculate?What would be the expected outcome of an endospore stain test If the bacteria is a pathogenic intestinal bacteria?Which of the following methods is most sensitive for identifyingdifferent strains of a microbe?a. microscopic examination b. hemolysis on blood agar c. DNA analysis d. agglutination test
- Are the large numbers of microorganisms found in the mouth cause for concern? Explain. How can you determine whether a culture or subculture is pure? What kinds of clinical speciments may yield a mixed flora in bacterial cultures? Why was a blood agar, rather than a nutrient agar, plate used for the culture from your mouth?Why did you perform the catalase test on colonies growing on nutrient agar plates but not on the blood agar plates?What are the results from the gram stain and result of the API strip ? (Positive/ negative) for each test in the strip and numerical code