A patient presents at the clinic with an acute viral...

A patient presents at the clinic with an acute viral infection. Assays that analyze the viral life cycle classify the virus into Group $\mathrm{V}$ with a segmented genome. Which virus is the most likely diagnosis for the patient? a. Rabies virus b. Picornavirus c. HIV-1 d. Influenza A virus

A patient presents at the clinic with an acute viral infection. Assays that analyze the viral life cycle classify the virus into Group $\mathrm{V}$ with a segmented genome. Which virus is the most likely diagnosis for the patient?
a. Rabies virus
b. Picornavirus
c. HIV-1
d. Influenza A virus

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Key Concepts

Influenza A Virus

Influenza A virus is a well-known pathogen with a segmented, negative-sense RNA genome that falls under Group V of the Baltimore classification. It is recognized for its ability to cause seasonal epidemics and pandemics, and its segmented genome plays a key role in its capacity to undergo antigenic drift and shift.

Baltimore Classification

The Baltimore classification system categorizes viruses based on their type of genome and method of mRNA synthesis, which is essential for understanding their replication mechanisms. Group V under this system specifically refers to viruses with a negative-sense single-stranded RNA genome.

Negative-Sense RNA Viruses

Negative-sense RNA viruses contain RNA that is complementary to the mRNA and thus require an RNA-dependent RNA polymerase to transcribe their genome into a usable positive-sense mRNA for protein synthesis. This group includes pathogens that can cause acute infections in humans.

Segmented Genome

A segmented genome is one that is divided into separate pieces, which can allow viruses to undergo genetic reassortment. This process contributes to antigenic variation and the evolution of new viral strains, making it a critical feature in understanding viral pathogenicity and epidemiology.

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