Validation of specific inhalation challenge for the diagnosis of occupational asthma due to persulphate salts

The significant value of tests used to certify the diagnosis of occupational asthma due to persulphate salts remains uncertain.To validate the specific inhalation challenge (SIC) test for the diagnosis of occupational asthma.Eight patients with occupational asthma due to persulphate salts, eight patients with bronchial asthma who were never exposed to persulphate salts, and ten healthy subjects were studied. Clinical history taking, spirometry,...