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 fairly common respiratory condition in children usually caused by a viral infection or allergic reaction.Croup affects the windpipe or trachea, the bronchi or airways to the lungs, and the larynx or voice box.roup is a fairly common respiratory condition in children usually caused by a viral infection or allergic reaction.