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Asthma is usually brought on by allergens in the environment, but respiratory tract infections caused by viruses have also been shown to cause asthma. Microbial infections can also eventually bring on asthma.

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9y ago
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10y ago

Bronchitis simply means "inflammation of the bronchioles". The bronchioles are the tubes connecting the trachea to the alveoli where air exchange happens in the lungs.

Common causes of bronchitis include asthma (an allergic or auto-immune disorder), bacterial infection and viral infection.

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15y ago

I have bronchial asthma and can be caused by exercise or allergiens.

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11y ago

alergen

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Q: What is the causative agent for bronchitis?
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