Microbiology Fundamentals: A Clinical Approach
3rd Edition
ISBN: 9781259709227
Author: Marjorie Kelly Cowan Professor, Heidi Smith
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 3, Problem 14Q
The results of your patient’s wound culture just arrived, and
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A patient is experiencing high fever and body aches from an infected skin wound. You suspect a bacterial infection and perform a Gram stain from a pustular exudate why are you able to rule out an ENDOTOXIN as the cause of the fever and from the image, which organism do you suspect? The bacteria is purple(+).
Many people use antimicrobial soap to kill bacteria on their hands. However, overuse may increase the risk of infection. How could this occur?
Imagine a microbiologist performed a series of Gram stains but forgot to perform the destain step during the stains. Which type(s) of erroneous results would the scientist observe?
Cells that are actually gram-negative would appear gram-positive
Cells that are actually gram-positive would appear gram-negative
Both gram-negative and gram-positive cells would appear to be the opposite
Chapter 3 Solutions
Microbiology Fundamentals: A Clinical Approach
Ch. 3.1 - List the structures all bacteria possess.Ch. 3.1 - Identify three structures some but not all...Ch. 3.1 - Describe three major shapes of bacteria.Ch. 3.1 - Provide at least four terms to describe bacterial...Ch. 3.2 - Describe the structure and function of six...Ch. 3.2 - Prob. 6AYPCh. 3.2 - Q. Device-associated infections are very common...Ch. 3.3 - Differentiate between the two main types of...Ch. 3.3 - Prob. 8AYPCh. 3.3 - Prob. 9AYP
Ch. 3.3 - Prob. 2MMCh. 3.4 - Identify seven structures that may be contained in...Ch. 3.4 - Prob. 11AYPCh. 3.4 - Prob. 1NPCh. 3.5 - Compare and contrast the major features of...Ch. 3.6 - Differentiate between Bergeys Manual of Systematic...Ch. 3.6 - Name four divisions ending in cutes and describe...Ch. 3.6 - Define a species in terms of bacteria.Ch. 3 - Archaea a. are most genetically related to...Ch. 3 - Prob. 2QCh. 3 - Suppose an argument in your city has erupted about...Ch. 3 - Prob. 4QCh. 3 - As a supervisor in the infection control unit, you...Ch. 3 - Prob. 6QCh. 3 - Prob. 7QCh. 3 - Prob. 8QCh. 3 - Bacteria and archaea have a much greater diversity...Ch. 3 - Prob. 10QCh. 3 - Bacteria have been found to change the structures...Ch. 3 - Bacterial and archaeal chromosomes are not...Ch. 3 - Prob. 13QCh. 3 - The results of your patients wound culture just...Ch. 3 - We know that bacteria/archaea and their genetics...Ch. 3 - Find the true statement about biofilms. a. They...Ch. 3 - Suggest more than one reason why bacteria may...Ch. 3 - Construct arguments agreeing with and refuting...Ch. 3 - Which of the following would be used to identify...Ch. 3 - During the cold war between the Soviet Union and...Ch. 3 - During the cold war between the Soviet Union and...Ch. 3 - From chapter 2, figure 2.18. Explain why some...
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- You have a mixed culture of 2 different bacterial species. One of the species is Gram negative bacilli and the other species is Gram positive cocci. You have noticed that one species is killed by penicillin antibiotics (attacks peptidoglycan) while the other survives. Neither species has antibiotic resistance genes. How can you explain this result? Remember to make direct reference to each bacterial species in your responsearrow_forwardIf you irrigate a wound with hydrogen peroxide it will bubble. What causes the bubble even if the wound is bacteria-Free and clean?arrow_forwardSuppose you performed a Gram stain from a pure culture of bacteria and observed a field of red and purple bacilli. Adjacent cells were not always the same color. Provide an explanation for this observation.arrow_forward
- MacConkey agar is often used to differentiate E. coli from other Gram-negative rods. The recipe for MacConkey agar is given in the table. Suppose you plated a mixed culture of Escherichia coli, Bacillus subtilis, and Streptococcus pyogenes onto a MacConkey agar plate. Which species would grow, and how would they appear? Why would the others NOT grow?arrow_forwardYou are a doctor at a field hospital deep in the Amazon jungle. A local villager comes to you sick with nausea, diarrhea and vomiting and you suspect they may have food poisoning. Several different types of bacteria can cause food poisoning including Campylobacter jejuni, Staphylococcus aureus, and Salmonella tyhphirium. How will using a microscope help you to identify which of the three bacteria are responsible for making your patient sick so that you can administer the correct antibiotic?arrow_forwardHow is UV radiation a good type of control mechanism against microbial growth? Explain what happens to the microbe and effects this control causes.arrow_forward
- How is UV radiation a good type of control mechanism against microbial growth? Please explain what happens to the microbe and effects this control causes.arrow_forwardIn dental offices, the instruments are cleaned in a supersonic bath, then sterilized using UV radiation. Specifically explain how UV light kills bacteria.arrow_forwardInfections among hospitalized patients are often related to the presence of a medical device in the patient. Which conditions favor the formation of biofilms on in-dwelling catheters?arrow_forward
- Consumers are advised to avoid stuffing a turkey the night before cooking (where the stuffing would be made on the stove and then placed in the turkey), even though the turkey is refrigerated. A homemaker questions this advice and points out that the bacteria of human disease grow mainly at warm temperatures, not in the refrigerator. What explanation might you offer to counter this argument?arrow_forwardWe have many antimicrobial drugs to treat bacterial infections, but very few for viruses. Why is it so difficult to treat viral infections? Hint: What would the targets for the drugs be?arrow_forwardGive the reason why is an organism such as Staphylococcus adapted to growth on the human skin but the streptococci are generally not shows?arrow_forward
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