The amount of (1 --> 3)-beta-D-glucan in pollen from different plants was e
valuated using the Limulus assay with a specific lysate. The amount ranged
from 79 to 1800 ng/10(6) pollen. A calculation of the inhaled dose suggests
that the amount of (1 --> 3)-beta-D-glucan present during periods with a h
igh pollen content in the air exceeds levels that cause airways inflammatio
n.