Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 15, Problem 3MCQ
Summary Introduction
Introduction:
Entry of pathogens to any host or humans through various routes such as mucous membrane or skin termed as portals of entry. Mostly they enter through the mucous membrane of respiratory tract, gastrointestinal tract, genitourinary tract, skin and blood. The pathogens cause various human diseases such as pneumonia, influenza, typhoid fever, giardiasis genital warts, herpes, syphilis conjunctivitis and trachoma etc.
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Chapter 15 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 15 - Compare pathogenicity with virulence.Ch. 15 - How are capsules and cell wall components related...Ch. 15 - Prob. 3RCh. 15 - Explain how drugs that bind each of the following...Ch. 15 - Prob. 5RCh. 15 - Prob. 6RCh. 15 - Prob. 7RCh. 15 - Which of the following genera is the most...Ch. 15 - How can viruses and protozoa avoid being killed by...Ch. 15 - Prob. 10R
Ch. 15 - The removal of plasmids reduces virulence in which...Ch. 15 - Prob. 2MCQCh. 15 - Prob. 3MCQCh. 15 - All of the following can occur during bacterial...Ch. 15 - The ID50 for Campylobacter sp. is 500 cells; the...Ch. 15 - Prob. 6MCQCh. 15 - A drug that binds to mannose on human cells would...Ch. 15 - The earliest smallpox vaccines were infected...Ch. 15 - Prob. 9MCQCh. 15 - Which of the following statements is true? a. The...Ch. 15 - Prob. 1ACh. 15 - Prob. 2ACh. 15 - Prob. 3ACh. 15 - How do each of the following strategies contribute...Ch. 15 - On July 8, a woman was given an antibiotic for...Ch. 15 - Explain whether each of the following examples is...Ch. 15 - Cancer patients undergoing chemotherapy are...
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- When bacteria causes the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply this is usually called __________. a. opportunisitc b. necrotizing fasciitis c. redundant infection d. hemolysis e. intrinsicarrow_forwardWhich factors would promote progression of an infection? Select all that apply. a. low microbial virulence b. increased percentage of optimal infectious dose c. correct portal of entry d. genetic profi le of host resistance to microbe e. no previous exposure to this infection f. decreased level of overall healtharrow_forwardAn infection that spreads from a local site to other tissues is known as a a. mixed infection. b. primary infection. c. focal infection. d. chronic infection.arrow_forward
- -Which of the following is not an example of a virulence factor? a. the pathogen changes it spike proteins over a short period of time b. the pathogen is nosocomial c. the pathogen can lyse phagosomes d. Lipopolysaccharide (LPS)arrow_forwardWhich ONE of the following best describes cephalexin? Select one: A. The bacterial target is located on the internal side of the cytoplasmic membrane B. An agent suitable for community use C. Resistance readily occurs via drug efflux in Gram-positive bacteria D. A parenteral penicillin E. An agent capable of disrupting bacterial membranesarrow_forwardBlood in the stool may occur in which of the following? a. Salmonella infection b. rotavirus infection c. Clostridium difficile infection d. Shigella infection e. b, c, and d f. a, c, and darrow_forward
- Select the letter of the choice that best completes the statement. Using clean linens and equipment will help break the chain of infectiona. between reservoir and portal of entry.b. between portal of exit and mode of transmission.c. between agent and reservoir.d. between portal of entry and host.arrow_forwardMatch the pathogen to the correct virulence factor Varicella-zoster virus Staphylococcus aureus Streptococcus pyogenes Pseudomonas aeroginosa Clostridium tetani A. latent infection B. clumping factor C. Exotoxin B and F protein D. Exoenzyme S E. neurotoxinarrow_forwardNormal microbiota provide protection from infection in each of the following ways EXCEPT: Question 3 options: A) they produce antibacterial chemicals. B) they compete with pathogens for nutrients. C) they make the chemical environment unsuitable for nonresident bacteria. D) they produce lysozyme.arrow_forward
- An antibiotic that disrupts the normal flora can causea. the teeth to turn brown b. aplastic anemia c. a superinfection d. hepatotoxicityarrow_forwardWhich of the following statements is incorrect? a. Mucosal surfaces are better than skin surfaces at supporting colonization by commensal microorganisms. b. The skin provides a larger surface area than mucosal surfaces for commensal microorganisms. c. There are ten times as many bacteria residing in the intestinal tract than the number of cells in the human body. d. It is common for commensal bacteria to live in symbiosis with their human hosts. e. During gestation in mammals, a fetus does not have any commensal microorganisms on their skin or mucosal surfaces.arrow_forwardEndotoxin is associated witha) Gram-positive bacteria.b) Gram-negative bacteria.c) the cytoplasmic membrane.d) endospores.arrow_forward
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