Which of the following is NOT a characteristic of croup?

Croup, commonly seen in children, is characterized by a distinctive set of symptoms caused by inflammation of the larynx, trachea, and bronchi, often due to viral infection. The presence of rhinorrhea, hoarse cry, and inspiratory stridor are well-established symptoms associated with croup.

Rhinorrhea, or a runny nose, is frequently seen in croup as it can be a component of the viral illness that precipitates the condition. A hoarse cry arises from the swelling and irritation of the larynx, which affects the vocal cords. Inspiratory stridor, a high-pitched sound during inhalation, is a hallmark of croup, indicating significant airway narrowing due to inflammation.

On the other hand, a wet cough, characterized by producing mucus or phlegm, is not a typical feature of croup. Croup usually presents with a "barking" cough that is dry and harsh, rather than a moist or productive cough. Therefore, the wet cough does not align with the classic presentation of croup and distinguishes it from other respiratory conditions that may involve more secretions, such as bronchiolitis or pneumonia.