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Viral Replication and Antigenic Drift Quiz

Test your knowledge on viral replication and antigenic drift with this quiz. Learn about different mechanisms of viral reproduction and how gradual changes in viral structure can lead to epidemics. Explore concepts like host cell lysis, continuous release of budding viral particles, and malignant transformation.

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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

Which type of virus causes continuous release of budding viral particles?

HIV

What is the main genetic material found in prokaryotes such as bacteria?

Double-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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