**Question:** Which of the following is true about Rotavirus?

A. Rotavirus is a single-stranded RNA virus that causes gastroenteritis in children and adults.
B. Rotavirus is a single-stranded DNA virus that primarily affects pigs.
C. Rotavirus is a double-stranded DNA virus that primarily affects birds.
D. Rotavirus is a bacterium that is resistant to antibiotics.

**Correct Answer:**

**Core Concept:** Rotavirus is a group of viruses with a double-stranded RNA genome, belonging to the Reoviridae family, and is the leading cause of severe diarrhea in infants and young children worldwide.

**Why the Correct Answer is Right:**

Rotavirus is the correct answer because it is a member of the Reoviridae family, specifically the Rotavirus genus. This virus is known to cause gastroenteritis, a condition characterized by inflammation of the gastrointestinal tract, and is a significant cause of severe dehydration and hospitalizations in young children. The correct answer describes Rotavirus as an RNA virus, which aligns with its biological nature.

**Why Each Wrong Option is Incorrect:**

A) The statement "Rotavirus is a single-stranded RNA virus that causes gastroenteritis in children and adults" is correct, but it should be limited to mentioning that Rotavirus primarily affects children, not adults.

B) Rotavirus is a virus, not a DNA virus. It is an RNA virus, making option B incorrect. Additionally, Rotavirus primarily affects humans and animals, not pigs.

C) Rotavirus is an RNA virus, not a double-stranded DNA virus. This option incorrectly states the virus is a DNA virus and primarily affects birds, which is not the case.

D) Rotavirus is a virus, not a bacterium. It is an RNA virus and not resistant to antibiotics. Antibiotic resistance is a characteristic of bacteria, not viruses.

**Clinical Pearl:**

Understanding the characteristics of Rotavirus is crucial for diagnosing and treating gastroenteritis cases, particularly in pediatric patients. Rotavirus infections can lead to severe dehydration and electrolyte imbalances, requiring prompt medical attention and interventions to prevent complications and promote recovery.