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Ch. 25 - Pathogenic RNA Viruses
Bauman - Microbiology with Diseases by Taxonomy 6th Edition
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBauman 6th EditionCh. 25 - Pathogenic RNA VirusesProblema 11
Capitolo 25, Problema 11

Reoviruses, such as rotaviruses and coltiviruses, are unique in ___________.
a. Being naked
b. Having double-stranded RNA
c. Being both arboviruses and zoonotic
d. Having protein spikes

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Step 1: Understand the characteristics of Reoviruses by reviewing their structural and genetic features. Reoviruses are a family of viruses that include rotaviruses and coltiviruses.
Step 2: Recall that Reoviruses are unique because they have a double-stranded RNA (dsRNA) genome, which is uncommon among viruses, as most RNA viruses have single-stranded RNA.
Step 3: Evaluate each option: (a) 'being naked' refers to lacking an envelope, which is true for Reoviruses but not unique to them; many viruses are naked. (b) 'having double-stranded RNA' is a distinctive feature of Reoviruses. (c) 'being both arboviruses and zoonotic' applies to some viruses but is not a defining trait of all Reoviruses. (d) 'having protein spikes' is common in many viruses and not unique to Reoviruses.
Step 4: Conclude that the unique feature of Reoviruses among the options given is their double-stranded RNA genome.
Step 5: Therefore, the correct answer corresponds to the option that highlights the double-stranded RNA characteristic.

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Structure of Reoviruses

Reoviruses are non-enveloped (naked) viruses characterized by a double-layered protein capsid. This structure protects their genetic material and distinguishes them from enveloped viruses, which have a lipid membrane.
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Double-Stranded RNA Genome

Reoviruses uniquely possess a double-stranded RNA (dsRNA) genome, unlike most RNA viruses that have single-stranded RNA. This dsRNA genome is segmented, allowing genetic reassortment and influencing replication mechanisms.
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Replication of Double-Stranded RNA Viruses

Arboviruses and Zoonotic Transmission

Arboviruses are viruses transmitted by arthropods, and zoonotic viruses can infect both animals and humans. While some reoviruses like coltiviruses are arboviruses and zoonotic, this is not a universal trait for all reoviruses.
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Transmission Electron Microscope (TEM)
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