Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 17, Problem 3CAE
A patient with chronic diarrhea was found to lack IgA in his secretions, although he had a normal level of serum IgA. What was this patient found to be unable to produce?
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Chapter 17 Solutions
Microbiology: An Introduction
Ch. 17 - Contrast the terms in the following pairs: a....Ch. 17 - What does MHC stand for? What is the function of...Ch. 17 - Why is dietary protein deficiency associated with...Ch. 17 - Prob. 4RCh. 17 - Prob. 5RCh. 17 - DRAW IT a. In the graph below, at time A the host...Ch. 17 - How would each of the following prevent infection?...Ch. 17 - Prob. 8RCh. 17 - Explain why a person who recovers from a disease...Ch. 17 - Prob. 10R
Ch. 17 - Prob. 1MCQCh. 17 - The type of protection provided by the injection...Ch. 17 - Prob. 3MCQCh. 17 - Prob. 4MCQCh. 17 - Prob. 5MCQCh. 17 - Prob. 6MCQCh. 17 - Prob. 7MCQCh. 17 - Prob. 8MCQCh. 17 - Prob. 9MCQCh. 17 - Prob. 10MCQCh. 17 - Prob. 1ACh. 17 - Why is dietary protein deficiency associated with...Ch. 17 - A positive tuberculin skin test shows cellular...Ch. 17 - On her vacation to Australia, Janet was bitten by...Ch. 17 - Prob. 1CAECh. 17 - Prob. 2CAECh. 17 - A patient with chronic diarrhea was found to lack...Ch. 17 - Newborns (under 1 year) who contract dengue have a...
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- What is an agglutination response? How can it be avoided when blood is transfused?arrow_forward(59) A 60-year old woman with type-2 diabetes mellitus comes to the physician because of a 6-week history of a progressive rash under both breasts. She says that the rash irritability responded to use of an over-the-counter topical preparation containing clotrimazole, but the treatment has recently has become ineffective in relieving her symptoms. Physical examination shows a 10-cm of erythema with a mucous discharge under each breast. Her finger stick blood glucose concentration is 115 mg/dL. Microscopic examination of the discharge shows branching hyphae. The physician suspects that the causal organism in this patient is resistant to clotrimazole. Alterations in which of the following microbial cell binding sites is the most likely cause of this resistance? (A) Lanosterol demethylase (B) Peptidyl transferase (C) Thymidine kinase (D) Topoisomerase IV (E) uridine kinasearrow_forward" it states that IgA deficiencies are the most common, affecting 1 in 400 people, and I was wondering what the specific reason for this is. I was just wondering if there was a physiological reason there are more disorders with IgA instead of any other type of B cell. Thanks.arrow_forward
- Why does antibody titer rise after infection? Is ahigh antibody titer indicative of an ongoing infection?Explainarrow_forwardT cells can differentiate into 5 different subsets of helper T cells. Answer the following questions for TH1 cells: A) In general, list three unique factors that differentiate the TH1 subset from the other subsets. B) For each of those factors identified in A, provide one specific example that applies to TH1 cells. C) What type of pathogens are targeted by the TH1 cells?arrow_forwardWhat is Cytotoxic Hypersensitivity?arrow_forward
- (56) A 1 year old boy dies of staphylococcal pneumonia. He has had multiple skin infections since birth. Separation of the umbilical cord was delayed. A skin window test was performed and no leukocyte accumulated on the cover ship. The cytometric analysis showed that only 5% of the T lymphocytes reacted with a monoclonal antibody to leukocyte functional antigen-1 chain (CD 18) compared with reactivity of 62 % for a normal subject. Just prior to death, his leukocyte count was 75,000/mm3. Which of the following is the most likely diagnosis? (A) AIDS (B) Cogenital Asplenia (C)Leukocyte Adhesion Deficiency (D) Severe Combined Immunodeficiency Disease (E) X linked agammaglobulinemiaarrow_forwardWhich of the following is the most likely future outcome for a thymocyte just entering the thymus? A) activation by a B-cell B) apoptosis C) differentiation into a Tc cell D) migration to a lymph node E) formation of a granulomaarrow_forwardHow is HLA serologic testing performed? Question 28 options: a) HLA antigens move through a limited pH gradient and are immobilized, complexed with antibody, and stained. b) T lymphocytes are harvested and introduced to a panel of test sera specific for antigens of the HLA system. c) DNA is isolated from peripheral white blood cells, fragmented, and hybridized. d) B lymphocytes are harvested and introduced to a panel of test sera specific for antigens of the HLA system.arrow_forward
- A 3-year-old child has a history of serious infections and is currently hospitalized with meningitis. The doctor suspects that he may have a complement deficiency and orders testing. A buffer that chelates calcium was added to specimen. There was a decrease radial haemolysis on agarose plate a) Which complement pathway accounted for the result obtained and how will the result be reported in terms of hemolysis at 50 %? b) What is hydrodynamic focusing and why is it an important feature of an instrument.arrow_forwardhere is a second, delayed spike of IgM in the secondary response. Why might this be occurring?arrow_forwardYou have a patient who has been injured by a rusty nail. As a precaution, you vaccinate her against tetanus. In response to the vaccine, how does her body produce antibodies against C. tetani and prevent future illness due to tetanus? A)B cells that produce an appropriate antibody undergo genomic rearrangement in order to produce other cells that secrete the same antibody. B)Every cell in her immune system produces antibodies against C. tetani. C)B cells with an appropriate antibody are stimulated to divide, producing plasma cells that make antibodies to C. tetani, and memory cells that "remember" C. tetani. D)Every B cell in her body produces antibodies against C. tetani.arrow_forward
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