Viral Replication and Antigenic Drift Quiz
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Questions and Answers

What type of genetic change is responsible for the sudden ability of an influenza virus to jump from one species to another?

  • Antigenic shift (correct)
  • Antigenic drift
  • Point mutations
  • Recombination
  • Which type of virus causes continuous release of budding viral particles?

  • Herpesvirus
  • HIV (correct)
  • Poliovirus
  • HPV
  • What is the main genetic material found in prokaryotes such as bacteria?

  • Double-stranded linear DNA
  • Circular RNA
  • Double-stranded circular DNA (correct)
  • Single-stranded circular DNA
  • What type of staining property do Gram-negative bacteria exhibit?

    <p>Do not retain stain and are counterstained red</p> Signup and view all the answers

    Which bacterial morphology is characteristic of Streptococcus pneumoniae?

    <p>Cocci in chains (streptococci)</p> Signup and view all the answers

    What organism is responsible for causing pharyngitis among various other infections based on the text?

    <p>Streptococcus pneumoniae</p> Signup and view all the answers

    What is the main function of the enzymes secreted by Neisseria gonorrhoeae?

    <p>Neutralize primary defense of respiratory and genital tracts</p> Signup and view all the answers

    How do Borrelia species avoid immunologic detection during the disease course?

    <p>Alter surface antigens</p> Signup and view all the answers

    Which diagnostic technique involves the growth of microorganisms outside the body on artificial growth media?

    <p>Culture</p> Signup and view all the answers

    What is one of the roles of invasive factors produced by infectious agents?

    <p>Facilitate penetration of host tissue</p> Signup and view all the answers

    How are bacterial pathogens identified in culture-based diagnostics?

    <p>Based on biochemical characteristics and morphology</p> Signup and view all the answers

    What is the primary purpose of serology in diagnosing infectious diseases?

    <p>To identify specific antibody types in the host</p> Signup and view all the answers

    What was the suspected diagnosis after Jason visited his physician?

    <p>West Nile fever</p> Signup and view all the answers

    Why did Jason's physician order serologic testing?

    <p>To confirm the presence of infection</p> Signup and view all the answers

    During which phase of the illness do antibody titers tend to be elevated?

    <p>Acute phase</p> Signup and view all the answers

    What contributes to the signs and symptoms of an infectious illness during the acute phase?

    <p>Rapid spread of the pathogen</p> Signup and view all the answers

    What type of genome does the West Nile virus have?

    <p>Single-stranded RNA</p> Signup and view all the answers

    How does West Nile virus replicate?

    <p>By budding off host cell membranes</p> Signup and view all the answers

    Why is it not advisable to prescribe an antibiotic for a viral infection?

    <p>Viruses do not respond to antibiotic therapy</p> Signup and view all the answers

    What is the purpose of immunotherapy?

    <p>To stimulate the host's immune response to limit or reverse the spread of pathogens</p> Signup and view all the answers

    What is the function of IVIG in treating infections?

    <p>To stimulate white blood cell replication and antibody production</p> Signup and view all the answers

    Why are immunizations considered the most efficient means of preventing infectious diseases?

    <p>They reduce the spread of vaccine-preventable illnesses by boosting immunity</p> Signup and view all the answers

    In which cases is surgical intervention recommended for treating infections?

    <p>When the pathogen is resistant to available treatments</p> Signup and view all the answers

    Which group of biological agents poses the highest bioterrorism threat according to the text?

    <p>Category A Agents</p> Signup and view all the answers

    What is the term for an illness due to a pathogen or its toxic product, transmitted to a susceptible host?

    <p>Infection</p> Signup and view all the answers

    Which term refers to organisms that transmit an infectious agent from one animal or plant to another?

    <p>Vectors</p> Signup and view all the answers

    What is the term for an interaction in which both the microorganism and the host benefit?

    <p>Mutualism</p> Signup and view all the answers

    Which term describes free-living organisms that obtain their growth from dead or decaying organic material?

    <p>Saprophytes</p> Signup and view all the answers

    What is the degree in which a microorganism is capable of causing an infectious disease called?

    <p>Virulence</p> Signup and view all the answers

    Which term refers to the presence and multiplication of a living organism on or within a host?

    <p>Infection</p> Signup and view all the answers

    What is the likelihood of an agent causing severe disease known as?

    <p>Virulence</p> Signup and view all the answers

    Which term describes all microorganisms capable of producing an infectious disease when the health and immunity of the host are weakened?

    <p>Opportunistic pathogens</p> Signup and view all the answers

    Which term describes the interaction in which colonizing bacteria acquire nutritional needs and shelter without adversely affecting the host?

    <p>Commensalism</p> Signup and view all the answers

    What reflects the likelihood of an agent infecting a host when exposed and then multiplying within the host?

    <p>Infectivity</p> Signup and view all the answers

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