Home > Infectious Disease > Croup Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Mar 11, 2010 by Baptist Memorial Health Care, Views: 4171 Croup is a childhood respiratory illness that causes a charecteristic hacking cough. Fever, runny nose, and a barking cough are the common symptoms. Doctors can also hear a high pitch stridor. A humidifier can help to improve the barking cough.