BIO 271 Microbiology w/Lab Case Study 1–5 Quizzes| Complete, answers latest ; Portage Learning.

Case Studies 1-5 Microbiology w/Lab (BIOL 271) - Portage Learning, Answered Latest . Case Study 1 Quiz Question 1 2 / 2 pts Sporadic Endemic Epidemic Pandemic Parademic Correct answer  Question 2 2 / 2 pts A condition that results from inherited genetic mutations. A disorder triggered by factors such as pollutants, chemicals, or radiation. Instructions: Students should have completed and studied the information on the module case study prior to taking this quiz. If disease occurrence in a population is described as being at a frequency above the expected number in a specific area and time it is considered: Which of the following best describes a disease that is caused by an infectious agent? 7/23/26, 9:40 PM Case Study 1 Quiz : Microbiology w/Lab - Burtt - 2026A Case Studies 1-5 Microbiology w/Lab (BIOL 271) - Portage Learning, Answered Latest .A health issue from the presence and activity of pathogenic microorganisms. A syndrome that develops due to lifestyle choices such as diet and exercise habits. Correct answer  Question 3 2 / 2 pts That the subject was healthy before being exposed to the pathogen. That the pathogen is the same one that was originally isolated and is the cause of the disease. That the disease can be transmitted from one subject to another. That the pathogen can mutate into a new form. Correct answer  Question 4 2 / 2 pts True False Correct answer  Question 5 2 / 2 pts Anthropologist Epidemiologist Microbiologist Neuropathologist Correct answer  Question 6 2 / 2 pts True False Koch's postulates include re-isolating the pathogen from the experimental subject after inducing the disease. What does this step confirm? True or False: Diseases like pneumonia, hepatitis, and meningitis can be caused by multiple different pathogens, which means a single causative agent is not always identifiable. In a case where disease symptoms suggest nervous system involvement, which specialist would examine brain and nervous tissue for abnormalities? True or False: The causative agent of Scrapie is known for its resilience, remaining infectious even after treatments that typically kill microbes, and was initially thought to possibly be a "camouflaged virus". 7/23/26, 9:40 PM Case Study 1 Quiz : Microbiology w/Lab - Burtt - 2026A  Question 7 2 / 2 pts True False Correct answer  Question 8 2 / 2 pts They initiate an immune response when they accumulate in the brain tissue. They are defective proteins that always cause Transmissible Spongiform Encephalopathies (TSEs). They are foreign proteins that the body's immune system fights off. They are encoded by our DNA and can misfold into a disease-causing form (p-PrP). Correct answer  Question 9 2 / 2 pts Has protein present Contains genetic material Does not carry out its own metabolic reactions Has no plasma membrane present Is not considered cellular Correct answer  Question 10 2 / 2 pts Prions are too small for the immune system to detect. Prion disease is a genetic disease, which cannot be eliminated by the immune system. The immune system only protects against bacteria and viruses. They are “self” proteins and so they are ignored by the immune system. Quiz Score: 20 out of 20 True or False: Treatment with proteases destroyed the causative agent causing Scrapie. What is the primary characteristic of normal prion proteins (c-PrP) found in the nervous system tissue? Which of the following is NOT true concerning prions? Why is it difficult for the immune system to eliminate prions? 7/23/26, 9:40 PM Case Study 1 Quiz : Microbiology w/Lab - Burtt - 2026A Due No due date Points 20 Questions 10 Time Limit 30 Minutes Attempt History Attempt Time Score LATEST Attempt 1 20 minutes 20 out of 20 Score for this quiz: 20 out of 20 Submitted Jun 17 at 9:48pm This attempt took 20 minutes. Correct answer  Question 1 2 / 2 pts Antibiotic that is manufactured chemicals synthetic Antibiotic that is a chemically modified natural substance semisynthetic Antibiotic that is made by microorganisms natural Correct answer  Question 2 2 / 2 pts Upper UTIs are less serious and affect the urethra and bladder. Lower UTIs can lead to systemic infections like bacteremia. Upper UTIs involve the kidneys and ureters and can be more severe. Match the following terms: What differentiates an upper urinary tract infection (UTI) from a lower UTI? 7/23/26, 9:41 PM Case Study 2 Quiz: Microbiology w/Lab - Burtt - 2026A Correct answer  Question 3 2 / 2 pts Have the lowest occurrence among healthcare-acquired infections. A leading cause of secondary bacteremia in healthcare settings Are easily treated with first-line antibiotics and rarely recur. Are the least common cause of secondary bacteremia in hospitals. Correct answer  Question 4 2 / 2 pts A secondary infection that is less severe than the initial infection. An infection that occurs due to the weakening of the immune system by antibiotics. A new infection that occurs during or after treatment with antibiotics. An infection that is treated effectively with first-line antibiotics. A primary infection that occurs without prior antibiotic treatment. Correct answer  Question 5 2 / 2 pts True False Correct answer  Question 6 2 / 2 pts Mix a bacterial culture with a viral phage known to carry resistance genes. Culture bacteria on a medium containing dead cells with resistance genes. Use a chemical agent to induce pili formation between bacterial cells. Apply an electrical current to increase the uptake of environmental DNA by bacteria. Catheter-associated urinary tract infections (CAUTIs) are significant because they: Which of the following best describes the concept of "superinfection"? True or False: Frederick Griffith's experiments in 1928 involved demonstrating transformation using Streptococcus pneumoniae, which showed the transfer of virulent traits. In a laboratory setting, how might you demonstrate transduction as a method of horizontal gene transfer? 7/23/26, 9:41 PM Case Study 2 Quiz: Microbiology w/Lab - Burtt - 2026A Correct answer  Question 7 2 / 2 pts By increasing the absorption of the drug. By changing the drug's chemical structure. By altering the target protein via mutation By producing more of the target protein. By preventing the drug from entering the cell. Correct answer  Question 8 2 / 2 pts By the turbidity of the solution indicating bacterial growth. By the color change in multi-well plates indicating bacterial death. By the size of the zone of inhibition around an antibiotic disk. By the concentration of antibiotic that kills 99.9% of the bacteria. By the genetic markers present for antibiotic resistance. Correct answer  Question 9 2 / 2 pts True False Correct answer  Question 10 2 / 2 pts Regulated use of antibiotic use in developing countries. Compliance with prescription dosage and timing. Compliance with over the counter dosage and timing Noncompliance with prescription dosage and inappropriate prescriptions. How do resistance genes alter the effectiveness of antibiotics that target proteins? In broth dilution tests, how is the minimum bactericidal concentration (MBC) determined? True or False: Handwashing according to protocols is a responsibility of healthcare workers under antibiotic stewardship to prevent the spread of resistant infections. Select all that apply: In clinical settings, what practice is identified as promoting antibiotic resistance? 7/23/26, 9:41 PM Case Study 2 Quiz: Microbiology w/Lab - Burtt - 2026A Using antibiotics strictly for viral infections Quiz Score: 20 out of 20 7/23/26, 9:41 PM Case Study 2 Quiz: Microbiology w/Lab - Burtt - 2026A Due No due date Points 20 Questions 10 Time Limit 30 Minutes Attempt History Attempt Time Score LATEST Attempt 1 20 minutes 18 out of 20 Score for this quiz: 18 out of 20 Submitted Jul 3 at 3:43pm This attempt took 20 minutes. Correct answer  Question 1 2 / 2 pts By producing white blood cells to fight infections. By serving as a physical barrier against external impacts. By connecting the CNS to the peripheral nervous system. By providing buoyancy, nutrient delivery, and waste removal. By acting as a conduit for electrical signals in the CNS. Correct answer  Question 2 2 / 2 pts True False Correct answer  Question 3 2 / 2 pts Non-polio enteroviruses Herpes simplex viruses How does the cerebrospinal fluid (CSF) contribute to the protection of the CNS? True or False: A virus can breach the blood-brain barrier by infecting the capillary cells (endothelial cells) of the BBB, leading to the release of new virus particles directly into the CNS. Which of the following pathogens are commonly associated with bacterial meningitis? 7/23/26, 9:42 PM Case Study 3 Quiz: Microbiology w/Lab - Burtt - 2026A Clostridium botulinum All of these. Wrong answer  Question 4 0 / 2 pts True False Correct answer  Question 5 2 / 2 pts True False Typically, if a patient has viral meningitis, they will have normal or slightly elevated protein and normal glucose in the CSF from a lumbar puncture. OR Typically, if a patient has bacterial meningitis, they will have higher protein and lower glucose in the CSF from a lumbar puncture. Correct answer  Question 6 2 / 2 pts These tests detect specific antigens or antibodies in the blood, indicating the presence of a pathogen or a response to it by the immune system Serological tests This category includes tests that can be performed at or near the site of patient care, providing results within minutes without the need for a centralized laboratory. Point-of-care diagnostics and ra Using this method, clinicians can directly observe the sample for the presence of pathogens under a microscope, often with the aid of stains to highlight the organisms. True or False: Point-of-care diagnostics are a subset of CIDTs that must be sent to a lab and cannot provide results on site. True or False: Typically, if a patient has viral meningitis, they will have higher protein and lower glucose in the CSF from a lumbar puncture. Match the following diagnostic test to its description: 7/23/26, 9:42 PM Case Study 3 Quiz: Microbiology w/Lab - Burtt - 2026A Other Incorrect Match Options: Enzyme-based immunoassays (ELISAs) Molecular methods (e.g., PCR and NAATs) Correct answer  Question 7 2 / 2 pts Beads falling to the bottom of the well in a dense pile. No observable change in the serum or beads. A broader dot created by a larger lattice of cross-linked beads. The disappearance of the T. pallidum antigen from the plate. Correct answer  Question 8 2 / 2 pts An infected patient is correctly diagnosed. A non-infected patient is diagnosed as being infected. A non-infected patient is correctly identified as negative. An infected patient is missed and not diagnosed. Correct answer  Question 9 2 / 2 pts Annealing Extension Denaturation Ligation Correct answer  Question 10 2 / 2 pts In an agglutination assay for syphilis, what indicates a positive test for the presence of antibodies to Treponema pallidum? In the context of sensitivity, what is the main consequence of a False Negative result? What is the first step in a PCR cycle? 7/23/26, 9:42 PM Case Study 3 Quiz: Microbiology w/Lab - Burtt - 2026A To change the color or release light upon interaction with a substrate, allowing quantification. To act as the primary antibody binding directly to antigens. To capture antigens on the plate before detection. Quiz Score: 18 out of 20 What is the purpose of the reporter enzyme in an ELISA test? 7/23/26, 9:42 PM Case Study 3 Quiz: Microbiology w/Lab - Burtt - 2026A Due No due date Points 20 Questions 10 Time Limit 30 Minutes Instructions Attempt History Attempt Time Score LATEST Attempt 1 12 minutes 20 out of 20 Score for this quiz: 20 out of 20 Submitted Jul 8 at 9:09pm This attempt took 12 minutes. Correct answer  Question 1 2 / 2 pts Hypothesis Prediction Observation Test Theory Correct answer  Question 2 2 / 2 pts Higher recovery rates at home births. Similar symptoms between his colleague Kolletschka and women with childbed fever. Instructions: Students should have completed and studied the information on the module case study prior to taking this quiz. What is the first step in the scientific method that involves the notice or interest in a natural phenomenon for study? What observation led Ignaz Semmelweis to investigate the cause of childbed fever at the Vienna General Hospital? 7/23/26, 9:42 PM Case Study 4 Quiz: Microbiology w/Lab - Burtt - 2026A The putrid odor on hands after an autopsy. The belief in atmospheric-cosmic-telluric changes. Correct answer  Question 3 2 / 2 pts Decontamination is equivalent to sterilization. Decontamination is only concerned with removing visible dirt. Decontamination includes sterilization and disinfection techniques. Decontamination can only be achieved through the use of disinfectants. Decontamination always ensures the complete elimination of endospores. Correct answer  Question 4 2 / 2 pts Answer 1: Aseptic technique Disinfectants Antisepsis Degerming Sanitization Pasteurization Suffix -stasis/-static Suffix -cide/-cidal Answer 2: Aseptic technique Disinfectants Antisepsis Degerming Sanitization Pasteurization Which of the following is a true statement regarding decontamination? Match the following terms to their correct examples: 1. Disinfectants Soap, bleach, UV light, heat, alcohol used on non-living surfaces. 2. Antisepsis Alcohol or iodine applied to skin before an injection. 3. Aseptic technique Lab equipment like loops are flamed; surgeons keep a sterile surgical field. 4. Sanitization Steam cleaning or mopping public bathroom floors with disinfectant. 7/23/26, 9:42 PM Case Study 4 Quiz: Microbiology w/Lab - Burtt - 2026A Suffix -cide/-cidal Answer 3: Aseptic technique Disinfectants Antisepsis Degerming Sanitization Pasteurization Suffix -stasis/-static Suffix -cide/-cidal Answer 4: Aseptic technique Disinfectants Antisepsis Degerming Sanitization Pasteurization Suffix -stasis/-static Suffix -cide/-cidal Correct answer  Question 5 2 / 2 pts Low-level disinfection Intermediate-level disinfection High-level disinfection Critical sterilization Semi-critical sterilization Correct answer  Question 6 2 / 2 pts True False According to the Spaulding Criteria, which level of germicidal activity is required for a surgical instrument that contacts sterile tissue? True or False: Antimicrobials that disrupt cell walls or membranes can trigger cell lysis, leading to the death of the organism. 7/23/26, 9:42 PM Case Study 4 Quiz: Microbiology w/Lab - Burtt - 2026A  Question 7 2 / 2 pts True False Correct answer  Question 8 2 / 2 pts They have a robust phospholipid covering. They are smaller than most microbes. They consist of highly resistant proteins. They are susceptible to heat. They can easily be washed away with disinfectants. Correct answer  Question 9 2 / 2 pts It kills most microbes immediately. It increases microbial metabolism. It slows down microbial metabolism and growth. It leads to the rapid proliferation of microbes. It has no effect on enzymatic reactions. Correct answer  Question 10 2 / 2 pts Use-Dilution Test Kelsey-Sykes Capacity Test In-Use Test Phenol Coefficient Test Quiz Score: 20 out of 20 True or False: Disinfectants are equally effective across a wide range of temperatures and pH levels. Why are prions difficult to destroy using standard sterilization techniques in the medical field? How does refrigeration affect microbial growth? Which test would be most informative for a school to assess the performance of a disinfectant used on desks and doorknobs in actual use conditions? 7/23/26, 9:42 PM Case Study 4 Quiz: Microbiology w/Lab - Burtt - 2026A Due No due date Points 20 Questions 10 Time Limit 30 Minutes Instructions Attempt History Attempt Time Score LATEST Attempt 1 11 minutes 20 out of 20 Score for this quiz: 20 out of 20 Submitted Jul 16 at 11:25am This attempt took 11 minutes. Correct answer  Question 1 2 / 2 pts Staphylococcus aureus Bacillus cereus Clostridium botulinum Escherichia coli Correct answer  Question 2 2 / 2 pts True Instructions: Students should have completed and studied the information on the module case study prior to taking this quiz. Which microorganism is responsible for all types of botulism mentioned? True or False: Mass spectrometry and PCR have replaced the mouse lethality bioassay as the standard for diagnosing neurotoxin presence due to their accuracy and speed. 7/23/26, 9:43 PM Case Study 5 Quiz: Microbiology w/Lab - Burtt - 2026A Correct answer  Question 3 2 / 2 pts Infectious Diseases Information System (IDIS) National Notifiable Diseases Surveillance System (NNDSS) Statewide Infectious Reporting System (SIRS) Epidemiological Data Registry (EDR) Correct answer  Question 4 2 / 2 pts The overall health of a microorganism. The genetic diversity within a microbial species. The speed at which an infection by a microbe spreads from host to host. The continuum of pathogenicity and its impact on the infection's severity. Correct answer  Question 5 2 / 2 pts Answer 1: Antigen masking Mimicry Variation Latency Intracellular lifestyle Suppress Immune function Avoid phagocytosis Which system is used by the CDC to compile information on "Notifiable Diseases" in the United States? Virulence is a term that indicates: Match these evasion tactics with their mechanisms: 1. Latency Pathogen remains in a hidden state to avoid immune surveillance. 2. Mimicry Microbe imitates host cell components to prevent detection. 3. Suppress Immune function Pathogen interferes with the host's immune defenses. 7/23/26, 9:43 PM Case Study 5 Quiz: Microbiology w/Lab - Burtt - 2026A Antigen masking Mimicry Variation Latency Intracellular lifestyle Suppress Immune function Avoid phagocytosis Answer 3: Antigen masking Mimicry Variation Latency Intracellular lifestyle Suppress Immune function Avoid phagocytosis Correct answer  Question 6 2 / 2 pts If it enhances the pathogen's survival in the host. If the virulence factor requires minimal energy to maintain. If the virulence factor is not beneficial in the presence of antibiotics. If the virulence factor no longer provides a benefit to the pathogen. If the host develops immunity to the virulence factor. Correct answer  Question 7 2 / 2 pts Administering antibiotics to neutralize the endotoxins Using decontamination and aseptic techniques to reduce bacterial transfer Developing vaccines against endotoxins Heating the environment to destroy lipid A Implementing anti-inflammatory treatments to counteract fever and chills Correct answer  Why might a pathogen lose a virulence factor over time? What is the best method to protect patients from the effects of endotoxins? 7/23/26, 9:43 PM Case Study 5 Quiz: Microbiology w/Lab - Burtt - 2026A 2 / 2 pts Type I exotoxin Type II exotoxin Type III exotoxin Correct answer  Question 9 2 / 2 pts Secreting enzymes that degrade host tissues Sticking to the surface of host cells Protecting bacteria from the host's immune response Assisting microbes in nutrient acquisition Forming protective blood clots for the pathogen Correct answer  Question 10 2 / 2 pts True False Quiz Score: 20 out of 20 Which type of exotoxin binds to a plasma membrane receptor and initiates a signaling cascade without entering the cell? Invasins are associated with which aspect of pathogenicity? Select all that apply. True or False: The human body makes iron readily available in host tissues for use by cellular pathogens. 7/23/26, 9:43 PM Case Study 5 Quiz: Microbiology w/Lab - Burtt - 2026A