BIOD 171 Essential Microbiology w/ Lab: Case Study 3 Quiz: Essential Microbiology with Lab-2025 | Answered Correctly.

Case Study 3 Quiz: Essential Microbiology with Lab- 2025 Score for this quiz: 19.33 out of 20  Question 1 2 / 2 pts To allow all types of molecules to filter into the CNS. To prevent the passage of most molecules, including many pathogens, into the CNS. To enable the free exchange of cells and proteins between blood and CNS tissue. To produce antibodies against CNS infections. To facilitate the entry of nutrients without any restrictions.  Question 2 2 / 2 pts True False During transcytosis, microbes do enter cells through endocytosis and traverse the cell within an endosomal vesicle before being released into the CNS.  Question 3 2 / 2 pts Bacterial infection What is the role of the blood-brain barrier (BBB) in CNS protection? True or False: During transcytosis, microbes cannot enter cells through endocytosis or traverse the cell within an endosomal vesicle to be released into the CNS. What is the most common cause of meningitis? Viral infection Fungal infection Parasitic infection  Question 4 2 / 2 pts True False  Question 5 2 / 2 pts True False Typically, if a patient has viral meningitis, they will have a lower white blood cell count and mostly lymphocytes OR Typically, if a patient has bacterial meningitis, they will have a high white blood cell count and mostly neutrophils.  Question 6 1.33 / 2 pts You Answered 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 Molecular methods (e.g., P Serological tests This technique involves using specific enzymes as markers to detect the presence of antigens or antibodies in a sample, often with a color change as a signal. True or False: PCR and NAATs are examples of molecular methods that are classified under cultureindependent diagnostic tests. True or False: Typically if a patient has bacterial meningitis they will have a lower white blood cell count and mostly lymphocytes. Match the following diagnostic test to its description: Enzyme-based immunoass 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 Other Incorrect Match Options: Molecular methods (e.g., PCR and NAATs) Microscopy  Question 7 2 / 2 pts Blood type and syphilis HIV and influenza Common cold and hepatitis. Diabetes and high blood pressure.  Question 8 2 / 2 pts True Negative results False Negative results True Positive results False Positive results  Question 9 2 / 2 pts PCR requires the pathogen to be alive and actively replicating. Immunoassays detect the pathogen directly and are more complex. PCR can give a positive result before the individual has produced a measurable amount of antibodies. Immunoassays are less expensive and easier to perform than PCR. For which diseases might an agglutination assay be used to diagnose? If a diagnostic test has a high specificity, which of the following outcomes is it able to identify? Why might PCR be preferable to immunoassays in the early detection of pathogens?  Question 10 2 / 2 pts Direct ELISA Competitive ELISA Sandwich ELISA Indirect ELISA Which type of ELISA detects antibodies in a patient’s sample?