Table 1

‚ÄÉCommon aetiologies of asthma exacerbations

Virus inducedRhinovirus (RV)
Respiratory syncytial virus (RSV)
Human metapneumovirus (HMV)
Influenza virus
Bacteria induced Mycoplasma pneumoniae
Chlamydia pneumoniae
AllergenFungi
Tree, weed and grass pollen
Indoor allergens
OccupationalAnimal exposures
Chemical exposures
IrritantsAirway pollutants