Medical Microbiology
Test Preparation
Course Introduction
Medical Microbiology explores the roles of microorganisms in human health and disease, focusing on the biology, pathogenic mechanisms, and epidemiology of bacteria, viruses, fungi, and parasites relevant to medicine. The course examines host-pathogen interactions, diagnostic microbiological techniques, antimicrobial therapies, and infection control practices. Emphasis is placed on understanding the clinical manifestations of infectious diseases, as well as current challenges such as antibiotic resistance and emerging pathogens, to equip students with foundational knowledge essential for careers in healthcare and biomedical research.
Recommended Textbook
Basic Immunology Functions and Disorders of the Immune System 4th Edition by Abul K. Abbas
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12 Chapters
181 Verified Questions
181 Flashcards
Source URL: https://quizplus.com/study-set/1165
Page 2
Chapter 1: Introduction to the Immune System
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16 Verified Questions
16 Flashcards
Source URL: https://quizplus.com/quiz/23007
Sample Questions
Q1) The two major functional classes of effector T lymphocytes are:
A)Helper T lymphocytes and cytotoxic T lymphocytes
B)Natural killer cells and cytotoxic T lymphocytes
C)Memory T cells and effector T cells
D)Helper cells and antigen-presenting cells
E)Cytotoxic T lymphocytes and target cells
Answer: A
Q2) Which of the following infectious diseases was prevented by the first successful vaccination?
A)Polio
B)Tuberculosis
C)Smallpox
D)Tetanus
E)Rubella
Answer: C
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Chapter 2: Innate Immunity
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17 Verified Questions
17 Flashcards
Source URL: https://quizplus.com/quiz/23008
Sample Questions
Q1) A 4-year-old girl stepped on a rusty nail in her backyard. Two days later, she is taken to the pediatrician because her heel is painful, red, and swollen and is warm to the touch. All of the following are mechanisms of innate immunity that may be protecting the patient against pathogenic microbes in the heel wound EXCEPT:
A)Epithelial barrier function of the skin of her foot
B)Intraepithelial lymphocytes present in the skin
C)Circulating neutrophils migrating to the site of the wound
D)Soluble cytokines that induce a local inflammatory response
E)Circulating anti-tetanus toxin antibodies
Answer: E
Q2) All of the following molecules are opsonins that facilitate efficient phagocytosis of microbes by neutrophils and macrophages EXCEPT:
A)C3b
B)C5a
C)C-reactive protein
D)IgG
E)Mannose-binding lectin
Answer: B
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Page 4
Chapter 3: Antigen Capture and Presentation to Lymphocytes
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17 Verified Questions
17 Flashcards
Source URL: https://quizplus.com/quiz/23009
Sample Questions
Q1) Which one of the following statements about dendritic cells is true?
A)Immature dendritic cells are ubiquitously present in skin and mucosal tissues.
B)Dendritic cell maturation occurs after migration to lymph nodes in response to signals derived from activated T cells.
C)Class II MHC and T cell costimulators are highly expressed on immature dendritic cells and are down-regulated during maturation.
D)Dendritic cells that enter lymph nodes through draining lymphatics migrate to the B cell-rich follicles in response to chemokines.
E)The principal function of mature dendritic cells is antigen capture. Answer: A
Q2) In the class I MHC pathway of antigen presentation, cytoplasmic proteins are tagged for proteolytic degradation by covalent linkage with which of the following molecules?
A)Calreticulin
B)Nuclear factor (NF)- B
C)Tapasin
D)Ubiquitin
E)Calnexin
Answer: D
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Chapter 4: Antigen Recognition in the Adaptive Immune System
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17 Verified Questions
17 Flashcards
Source URL: https://quizplus.com/quiz/23010
Sample Questions
Q1) CD1-restricted T cells differ from other T cells restricted to class I or class II MHC molecules in which one of the following ways?
A)CD-1 restricted T cells cannot rapidly secrete cytokines.
B)CD-1 restricted T cells recognize non-peptide antigens, such as lipids.
C)CD-1 restricted T cells bind both cell-associated and soluble antigens.
D)CD-1 restricted T cells express both CD4 and CD8 coreceptors.
E)CD-1 restricted T cells are actually natural killer (NK) cells.
Q2) Neonates, elderly persons, and otherwise immunocompromised patients are particularly susceptible to infections with Listeria monocytogenes. These patients typically have fever and chills, often progressing to hypotension and septic shock. In healthy individuals, however, such intracellular microbes are usually effectively phagocytosed and killed by macrophages, which become activated via:
A)CD40L-CD40 interactions between activated T helper cells and macrophages
B)CD28-B7 interactions between activated T cells and macrophages
C)Fas ligand-Fas interactions between activated cytotoxic T lymphocytes and macrophages
D)TCR-MHC class II interactions between activated T helper cells and macrophages
E)LFA-1-ICAM-1 interactions between activated T cells and macrophages
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Chapter 5: T Cell Mediated Immunity
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15 Verified Questions
15 Flashcards
Source URL: https://quizplus.com/quiz/23011
Sample Questions
Q1) Which one of the following signaling molecules, if mutated, would affect B cell maturation and function primarily without affecting T cell function?
A)Btk
B)Itk
C)Tec
D)PI-3 kinase
E)Zap-70
Q2) Which one of the following statements about T cells involved in an immune response is NOT true?
A)Activated T cells receive survival signals from antigen during an infection.
B)Activated T cells contribute to the activation of antigen-presenting cells via CD40 ligand.
C)Memory T cells generated during a primary immune response express high levels of interleukin-2 receptors and actively proliferate long after the primary response is completed.
D)The major effector function of helper T cells is to activate macrophages and other cells by releasing cytokines.
E)When an infection is eliminated, activated T cells die by apoptosis.
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7
Chapter 6: Effector Mechanisms of T Cell Mediated Immunity
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10 Verified Questions
10 Flashcards
Source URL: https://quizplus.com/quiz/23012
Sample Questions
Q1) Which of the following statements about cell-mediated immunity (CMI) is NOT true?
A)Deficiencies in CMI result in susceptibility to infections by viruses and intracellular bacteria.
B)CMI can be adoptively transferred by injecting serum from one individual to another.
C)Delayed-type hypersensitivity (DTH) is not a protective response against intracellular bacteria such as Mycobacterium tuberculosis.
D)The principal form of CMI that protects against viral infections is mediated by CD8 cytolytic T lymphocytes.
E)Phagocytes are essential in the effector phase of CMI responses to bacteria such as Listeria monocytogenes.
Q2) Differentiation of TH2 cells from naive precursor cells is dependent on which of the following?
A)Toll-like receptor (TLR) ligands
B)T-bet
C)Interleukin-12
D)GATA-3
E)Interferon-
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Page 8
Chapter 7: Humoral Immune Responses
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17 Verified Questions
17 Flashcards
Source URL: https://quizplus.com/quiz/23013
Sample Questions
Q1) The initial cellular events that are induced by antigen-mediated cross-linking of the B cell receptor (BCR) complex include all of the following EXCEPT:
A)Increased percentage of time spent in mitosis, resulting in rapid proliferation
B)Increased expression of B7, resulting in enhanced APC function
C)Increased expression of bcl-2, resulting in improved survival
D)Increased expression of CCR7, promoting migration into lymph node follicles
E)Increased expression of the interleukin-2 receptor, resulting in enhanced proliferation and response to T cell signals
Q2) All of the following assays are used to detect antibody production EXCEPT:
A)BrdU (bromodeoxyuridine) assay
B)Enzyme-linked immunosorbent assay (ELISA)
C)ELISPOT assay
D)Hemolytic plaque assay
E)Radioimmunoassay (RIA)
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9
Chapter 8: Effector Mechanisms of Humoral Immunity
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13 Verified Questions
13 Flashcards
Source URL: https://quizplus.com/quiz/23014
Sample Questions
Q1) Most effective vaccines that are currently in widespread use are specific for pathogenic viruses, and the immunity induced by the vaccines is mediated largely by antibodies. Which of the following statements accurately describes the major mechanism by which these vaccine-dependent antibody responses function?
A)The antibodies bind extracellular viral particles and prevent them from infecting cells.
B)The antibodies bind to viral antigens on the surface of infected cells and promote phagocytosis of the cells.
C)The antibodies bind to viral antigens on the surface of infected cells and promote complement-mediated lysis of the cells.
D)The antibodies bind to extracellular viral particles and target Fc receptor-expressing cytolytic T lymphocytes to kill the viruses.
E)The antibodies bind to viral envelope proteins and induce signals that inhibit viral replication.
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Chapter 9: Immunological Tolerance and Autoimmunity
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17 Verified Questions
17 Flashcards
Source URL: https://quizplus.com/quiz/23015
Sample Questions
Q1) Which of the following molecules does NOT promote lymphocyte apoptosis?
A)Bid
B)Caspase-8
C)FADD
D)FLIP
E)Glucocorticoid
Q2) Which one of the following is NOT a mechanism of T cell tolerance?
A)Inhibition of T cell activation by interleukin-12 from regulatory T cells.
B)Apoptosis induced by Fas ligand binding to Fas.
C)Anergy induced by B7-1 or B7-2 binding to CTLA-4.
D)Anergy induced by peptide-major histocompatibility complex (MHC) binding to T cell receptors (TCRs) without B7-1 or B7-2 binding to CD28.
E)TCR-mediated up-regulation of Bim or similar pro-apoptotic proteins.
Q3) Failure of self-tolerance is the cause of which one of the following types of diseases?
A)Allograft rejection
B)Autoimmunity
C)Atopy
D)Anergy
E)Acne
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Page 11
Chapter 10: Immune Responses against Tumors and Transplants
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10 Verified Questions
10 Flashcards
Source URL: https://quizplus.com/quiz/23016
Sample Questions
Q1) The first experiments that demonstrated protective adaptive immune responses to tumors involved transplantation of chemical carcinogen-induced tumors between rodents. Which of the following facts was learned from these experiments?
A)There are only a limited number of antigens that can evoke a protective anti-tumor response.
B)Transplanted sarcomas can evoke protective cytolytic T lymphocyte responses.
C)Carcinomas express tumor antigens that are recognized by T lymphocytes.
D)Protective immune responses against tumors are largely mediated by antibodies.
E)Spontaneously arising tumors are often eradicated by cytolytic T lymphocytes.
Q2) Which of the following is NOT a mechanism by which tumors evade immune responses?
A)Decreased synthesis of TAP
B)Increased expression of glycocalyx
C)Lack of costimulatory molecule expression
D)Increased expression of TGF-
E)Increased expression of Fas
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Chapter 11: Hypersensitivity
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14 Verified Questions
14 Flashcards
Source URL: https://quizplus.com/quiz/23017
Sample Questions
Q1) Which of the following is a common cause of hypersensitivity diseases?
A)Failure of lymphocyte maturation
B)Treatment with corticosteroids
C)Disseminated cancer
D)Failure of self-tolerance
E)Malnutrition
Q2) Which type of hypersensitivity disease is caused by deposition of antigen-antibody complexes in blood vessel walls?
A)Type I
B)Type II
C)Type III
D)Type IV
E)Type V
Q3) Which of the following conditions is NOT associated with immune complex deposition?
A)Arthus reaction
B)Autoimmune hemolytic anemia
C)Serum sickness
D)Systemic lupus erythematosus
E)Poststreptococcal glomerulonephritis
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Chapter 12: Congenital and Acquired Immunodeficiencies
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18 Verified Questions
18 Flashcards
Source URL: https://quizplus.com/quiz/23018
Sample Questions
Q1) Human immunodeficiency virus (HIV) is NOT a:
A)Herpesvirus
B)RNA virus
C)Enveloped virus
D)Retrovirus
E)Lentivirus
Q2) A 36-year-old man with a history of a positive anti-HIV antibody test comes to the clinic with fever, sore throat, nonproductive cough, and weight loss. This patient has had a partner for 8 years with whom he has frequently engaged in unprotected sexual intercourse. The partner is a healthy 29-year-old man who is HIV negative. The partner's relative "resistance" to HIV infection may be due to a loss-of-function mutation in which of the following proteins?
A)CD4
B)CD8
C)CCR5
D)Tumor necrosis factor (TNF)
E)NF- B
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