A child presents with stridor, barking cough and difficulty in breathing since 2-3 days. He has fever and elevated leukocyte count. All of the following statements about his condition are true, EXCEPT:
Subglottis stenosis and hypopharyngeal dilatation may be seen on X-rays
Boys are more commonly affected than girls
Symptoms are predominantly caused by involvement of the subglottis
Antibiotics form the mainstay of treatment