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What causes viral croup?

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Viral croup is caused by any virus that infects the voice box (larynx) and windpipe (trachea). The virus that most often causes croup is parainfluenza. It might start out like a cold, but over time, your child will develop a “barky” cough. He also may make a high-pitched, wheezing sound in his lower airway when he breathes in. The croup sound in the upper airway is a harsh, loud sound known as stridor. You child may also have a low-grade fever.

From: What Is Croup? What Causes It? WebMD Medical Reference

SOURCES:

UpToDate: “Patient Education: Croup in Infants and Children (Beyond the Basics).”

KidsHealth: “Croup.”

American Academy of Pediatrics: “Croup and Your Young Child.”

Seattle Children’s.org: “Should Your Child See a Doctor? Croup.”

Reviewed by Amita Shroff on May 17, 2019

SOURCES:

UpToDate: “Patient Education: Croup in Infants and Children (Beyond the Basics).”

KidsHealth: “Croup.”

American Academy of Pediatrics: “Croup and Your Young Child.”

Seattle Children’s.org: “Should Your Child See a Doctor? Croup.”

Reviewed by Amita Shroff on May 17, 2019

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