Which of the following is INCORRECT about acute bronchiolitis
A.
Acute bronchiolitis is usually preceded by exposure to an upper respiratory tract infection patient
B.
The main manifestations of acute bronchilitis are paroxysmal wheezy cough,dyspnea
C.
Auscultation may reveal fine crackles or wheezes
D.
Chest radiography shows hyperinflated lungs with patchy shadows and consolition
E.
The blood gas may reveal decreased PaO2 , and increased PaCO2.