Astroviruses

Definition

Astroviruses are a group of RNA viruses that primarily cause gastroenteritis, particularly in young children and the elderly. They are a common cause of diarrhea and vomiting globally.

5 Must Know Facts For Your Next Test

1. Astroviruses have an icosahedral capsid structure without an envelope.
2. Transmission occurs primarily through the fecal-oral route, often via contaminated food or water.
3. Symptoms typically include diarrhea, nausea, vomiting, abdominal pain, and fever.
4. The incubation period for astrovirus infections is usually around 3 to 4 days.
5. Diagnosis is often confirmed through PCR (polymerase chain reaction) testing of stool samples.

Review Questions

• What is the primary route of transmission for astroviruses?
• Which age groups are most commonly affected by astrovirus infections?
• How can astrovirus infections be diagnosed in a laboratory setting?

Related terms

Gastroenteritis: Inflammation of the stomach and intestines causing symptoms like diarrhea and vomiting.

PCR (Polymerase Chain Reaction): A laboratory technique used to amplify DNA sequences, making it easier to diagnose infections.

Fecal-Oral Route: A pathway typically involving ingestion of pathogens from contaminated feces through food or water.