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Rarely, '''rib fractures and pneumothorax''' may be evident.
Rarely, '''rib fractures and pneumothorax''' may be evident.
'''Lung ultrasound''', specifically '''VetBLUE''', can be used to differentiate between wet lungs, dry lungs, and nodular patterns. Asthma will have dry lungs.
'''Lung ultrasound''', specifically '''[[VetBLUE]]''', can be used to differentiate between wet lungs, dry lungs, and nodular patterns. Asthma will have dry lungs.
'''Haematology''' may reveal increased numbers of circulating [[eosinophils]].
'''Haematology''' may reveal increased numbers of circulating [[eosinophils]].
'''Bronchial culture''' may reveal [[:Category:Mycoplasmas|''Mycoplasma'' species]] in approximately 25% of cases.
'''Bronchial culture''' may reveal [[:Category:Mycoplasmas|''Mycoplasma'' species]] in approximately 25% of cases.
'''Heartworm''' antigen testing should be performed.
'''[[Heartworm]]''' antigen testing should be performed.
If the cat is presented in an acute episode, a '''rapid response''' to dexamethasone, bronchodilators and oxygen is highly suggestive of a diagnosis of asthma.
If the cat is presented in an acute episode, a '''rapid response''' to dexamethasone, bronchodilators and oxygen is highly suggestive of a diagnosis of asthma.