Chronic bronchitis is an infection of the trachea and bronchi for at least 3 consecutive months for more than 2 consecutive years.
The patient experiences symptoms of increase in dyspnea, sputum volume and sputum purulence over baseline on most days.
Diagnosis is basically based on clinical presentation.
The use of e-cigarettes changes the innate defence protein profiles in airway secretions, a new study has shown. These changes may lead to questions about e-cigarettes as the supposed healthier alternative to smoking.
Investigators from The University of Hong Kong (HKU) recently identified a mutation in H7N9 virus which causes the virus to possess a higher ability to infect humans while maintaining its ability to circulate effectively in poultry.