Eosinophil cationic protein (ECP) was 12.0 μg/L in the farmers with IgE-mediated asthma compared to 10.6 μg/L in the farmers with non-IgE-mediated asthma, but the ECP values did not correlate with the spirometry values or exposure to farm dust. Here, RNASE3 is linked to asthma.