Explain how the type of hemolysis can be used to tell apart two species that would look the same under the microscope. Why do you think E. coli and other enteric organisms are common causes of UTIs?
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Explain how the type of hemolysis can be used to tell apart two species that would look the same under the microscope.
Why do you think E. coli and other enteric organisms are common causes of UTIs?
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- 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?Why is aseptic urine collection important when cultures are ordered? If you counted 20 colonies from a 0.01-ml inoculum of a 1:10 dilution of urine, how many organisms per milliliter of specimen would you report? Is this number significant? What can you learn from visual inspection of a urine specimen? How would you relate these to the microorganisms present in the sample? How are UTIs acquired/transmitted? Explain why E. coli is frequently implicated in cystitis in females.Explain how the type of hemolysis can be used to tell apart two species that would look the same under the microscope.
- Which of the following statements is a reason why Acid-Fast Bacteria resist the Gram stain a) Because their cell wall architecture varies from both gram-negative and gram-positive bacteria. b) Because they lack the peptidoglycan layer. c) Because they have a thick peptidoglycan layer. d) Because they have a thick layer of fatty acids.If a experiment took place with culture of Ecoli What happens to the ampicillin flask when added to the e coli? b) How can this effect be explained 11.a) What happens in the flask with chloramphenicol? b) How can this effect be explained 12.a) What happens in the flask with streptomycin? b) How can this effect be explainedNot only is blood agar an enriched medium that can support fastidious organism growth, but it can also serve as a differential medium in the identification of streptococcal species because of the presence of red blood cells that can be destroyed by an organism's hemolysins. Looking at this photo, how could you describe the organism growing on the surface of this blood agar plate? Multiple Choice a) Gamma-hemolytic b) Alpha-hemolytic c) Non-hemolytic d) Beta-hemolytic
- Pseudomonas bacteria have porin proteins, are resistant to the chemical triclosan, and survive and can even multiply in quaternary ammonium compounds. True or False?A bacterial organism is used to inoculate mannitol broth medium. Following incubation the broth is yellow. This indicates that the organism: A) can use lactose and glucose B) cannot use lactose C) can use mannitol D) cannot use mannitolWhat will happen to the color of the Coomassie reagent as more protein is added? Group of answer choices A) It will turn more Blue B) It will turn more Green C) It will turn more Red
- When hydrogen peroxide is placed on a colony of an unknown bacterium, bubbles form. Based on this information, you can conclude that the bacteriuma) is Staphylococcus epidermidis.b) is a lactic acid bacterium.c) is beta-hemolytic.d) is catalase-positive.e) can cause strep throat.six Staphylococcus aureus are inoculated into a cream pie by the hands of a pastry chef. The generation time of S. aureus in cream pie at room temperature is 30 minutes. a) How many S. aureus are in the pie after 4 hours at RT? b) After 24 hours?The Kirby-Bauer test examines the effectiveness of antibiotics and disinfectants or antiseptics on separately plated bacteria. Which of the following Zones of Inhibition (ZOI) measurements on a plate of Klebsiella pneumoniae shows the strongest inhibition of the bacterium's growth? a) Penicillin, 7 mm ZOI b) Actinomycin, 9 mm ZOI c) Tetracycline, 26 mm ZOI d) Chloramphenicol 2 mm ZOI e) Streptomycin, 23 mm ZOI