Season One Edit. Beckett's initial relationship with Castle was strained because she viewed him as immature and reckless. She suspected (correctly) that Castle was using his research as an excuse to pursue her, and only tolerated his presence at the request of Captain Montgomery.
What causes croup in children. Croup in children is most often caused by the parainfluenza virus, a respiratory virus not related to the flu. But it can also be caused by other respiratory viruses including the flu. Yes, croup is contagious.
Croup is a condition that causes swelling and irritation of the upper airways â the voice box (larynx) and windpipe (trachea). Itâs caused by the same viruses that cause the common cold. Kids with croup have a âbarkyâ cough or hoarseness, especially when crying. Croup is most common in kids 6 months to 3 years old, but some older children also get croup. Most cases happen in the fall and early winter.