Connect with LearnSmart Labs Online Access for Microbiology Fundamentals
3rd Edition
ISBN: 9781260163674
Author: Marjorie Kelly Cowan
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 19, Problem 20Q
Summary Introduction
To determine:
The reason for not using tuberculin skin testing to determine the TB status of an HIV+ person
Introduction:
Tuberculosis is the disease that causes infection in the lungs. It is caused by Mycobacterium tuberculosis. HIV is a human immunodeficiency virus which causes a very serious disease called AIDS (acquired immunodeficiency syndrome). HIV interferes with the immune system of the body and reduces the ability to fight infections. It kills the T- helper cells and makes the individual vulnerable to infections.
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Which of the following best describes why it is difficult to develop antiviral drugs? Explain why.
A. antiviral drugs are very difficult to develop andhave no side effects
B. viruses are difficult to target because they usethe host cell’s enzymes and ribosomes tometabolize and replicate
C. viruses are too small to be targeted by drugs
D. viral infections usually clear up on their ownwith no problems
This question has 3 parts (A, B, & C), and is under the subject of Nutrition. Thank you!
They got this question wrong the 2 previous times I uploaded it here, please make sure it's correvct this time.
Chapter 19 Solutions
Connect with LearnSmart Labs Online Access for Microbiology Fundamentals
Ch. 19.1 - Draw or describe the anatomical features of the...Ch. 19.1 - Prob. 2AYPCh. 19.2 - List the types of normal biota presently known to...Ch. 19.2 - Prob. 1MMCh. 19.3 - List the possible causative agents, modes of...Ch. 19.3 - Identify the most dangerous cause of pharyngitis...Ch. 19.3 - Prob. 6AYPCh. 19.3 - Prob. 1NPCh. 19.3 - Prob. 2NPCh. 19.3 - Prob. 3NP
Ch. 19.4 - Prob. 7AYPCh. 19.4 - Compare and contrast antigenic drift and antigenic...Ch. 19.4 - Prob. 9AYPCh. 19.5 - Prob. 10AYPCh. 19.5 - Prob. 11AYPCh. 19.5 - Prob. 12AYPCh. 19.5 - Prob. 2MMCh. 19.5 - Prob. 4NPCh. 19 - Which of the following organisms is most...Ch. 19 - Prob. 2QCh. 19 - It has recently been established that the lower...Ch. 19 - Which of these microbes has an unusual, waxy, wall...Ch. 19 - What cell structure of Streptococcus pneumoniae...Ch. 19 - Prob. 6QCh. 19 - The betahemolysis of blood agar observed with...Ch. 19 - Would you expect the microbiome in the lung to be...Ch. 19 - In some diseases and outbreaks of respiratory...Ch. 19 - Prob. 10QCh. 19 - Prob. 11QCh. 19 - Prob. 12QCh. 19 - Which of the following infections often has/have a...Ch. 19 - Outline how a progression from influenza infection...Ch. 19 - Prob. 15QCh. 19 - Prob. 16QCh. 19 - Prob. 17QCh. 19 - Conducting your own research, describe the total...Ch. 19 - Watchful waiting is the recommended response to...Ch. 19 - Prob. 20QCh. 19 - Prob. 21QCh. 19 - From chapter 2, figure 2.18b. Although there are...
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- Use the following information to answer the question(s) below. Martin Wikelski and L. Michael Romero (Body size, performance and fitness in Galápagos marine iguanas, Integrative and Comparative Biology 43 [2003]:376-86) measured the snout-to-vent (anus) length of Galápagos marine iguanas and observed the percent survival of different-sized animals, all of the same age. The graph shows the log snout-vent length (SVL, a measure of overall body size) plotted against the percent survival of these different size classes for males and females. Survival (%) 100- 80- 60- 40- 20- 0+ 1.9 T 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Log SVL (mm) 19) Examine the figure above. What type of selection for body size appears to be occurring in these marine iguanas? A) directional selection B) stabilizing selection C) disruptive selection D) You cannot determine the type of selection from the above information. 3arrow_forward24) Use the following information to answer the question below. Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. They identify the gene responsible for toxin production. The dominant allele (T) codes for an enzyme that makes the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin. Heterozygotes produce an intermediate amount of toxin. The genotypes of all individuals in the population are determined (see table) and used to determine the actual allele frequencies in the population. TT 0.49 Tt 0.42 tt 0.09 Refer to the table above. Is this population in Hardy-Weinberg equilibrium? A) Yes. C) No; there are more homozygotes than expected. B) No; there are more heterozygotes than expected. D) It is impossible to tell.arrow_forward30) A B CDEFG Refer to the accompanying figure. Which of the following forms a monophyletic group? A) A, B, C, and D B) C and D C) D, E, and F D) E, F, and Garrow_forward
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