30 Questions
What is the primary characteristic of viruses?
They are acellular and nonliving
What is the structure of a virion composed of?
Virus genome, protein capsid, and may have an envelope
Which Baltimore class of viral genomes includes HIV and HTLV?
- ss RNA with RT (Class VI)
What is the viral capsid primarily composed of?
Structural units called capsomeres
Which type of viral symmetry has 20 triangular faces, 12 vertices, and 30 edges?
Icosahedral (cubic)
"Recovery from infection or persistence" is a step in which process?
"Steps in viral pathogenesis"
What is the primary characteristic of the host range of viruses?
It can vary from narrow to wide host range.
Which type of nucleic acid is characteristic of Class III Baltimore viruses?
ds RNA
Which type of response is the adaptive response to viral infection?
Acquired
What is the outcome of a viral infection characterized by the presence of viral genome with no active replication, but with potential for reactivation?
Latent/Subclinical
What are the natural barriers of the body in host defense to viral infection?
Innate response
What is the process by which viral infection leads to disease known as?
Viral pathogenesis
What type of vaccine involves presenting a part of the pathogen to stimulate an immune response?
Subunit vaccine
What type of transmission is most common for viruses?
Horizontal transmission
What type of infection results in the host being a carrier of the virus?
Chronic infection
Which type of antiviral agent targets virus-specific components to avoid damage to the host?
Amantadine
What type of antiviral agent prevents attachment of viruses to host cells?
Maraviroc
Which book provides information on medical microbiology related to this presentation?
Mims Medical Microbiology, 5th edition, Chapters 3 and parts of 15, 16, 17
Which type of infection results in virus-induced immunopathological disease?
Persistent infection
Which outcome may lead to neoplasia due to prolonged presence and activity of the virus?
Transforming (Oncogenesis)
Which step in viral pathogenesis involves the release of virus from first infected cells?
Assembly
Which factor determines whether viral infection becomes localized or systemic?
Release of virus from first infected cells
What is the primary replication site for Rhinoviruses in systemic infections?
Upper respiratory tract
How are most viruses spread throughout the host's body?
The bloodstream
Which factor does NOT contribute to the selectivity of productive infection by viruses?
pH lability
What is the main route of entry for Hepatitis A virus?
Feco-oral transmission
Which virus primarily replicates in the oropharynx or urogenital tract?
Herpesvirus (HSV types 1 and 2)
What is the primary mode of transmission for Dengue fever?
Vector (arthropod-borne) transmission
Which type of transmission is characteristic of prenatal transmission of viruses?
Vertical transmission from mother to fetus
What determines whether viral infection remains local or becomes systemic?
Release of virus from first infected cells
Learn about the definition of viruses, viral structure, viral pathogenesis, outcomes of viral infections, and the control of viral infection in this introductory quiz.
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