Which of the following conditions is likely to cause a non-productive cough?

A non-productive cough is characterized by the absence of mucus or phlegm production. In the case of asthma, the cough stems from airway inflammation and hyperresponsiveness, which are hallmark features of the condition. This leads to a dry cough, especially during asthma exacerbations, as the airways become constricted and irritated, often triggered by allergens, exercise, or cold air.

In contrast, acute bronchitis typically presents with a productive cough due to mucus production from inflammation of the bronchi. Bacterial pneumonia is also associated with a productive cough, often producing purulent sputum, as the infection causes significant mucus secretion. Similarly, while chronic obstructive pulmonary disease (COPD) may involve a cough, it is often productive as well, due to chronic bronchitis being one of its main components.

Thus, asthma uniquely presents a situation where the cough is more likely to be non-productive, primarily due to the physiological mechanisms involved in airway inflammation rather than mucus production.