Fungal and atopic sensitization are low among farmers in the Agricultural Health Study

The agricultural exposure history was well characterized by detailed questionnaires; however, no environmental exposure assessments were conducted. Because of the high degree of correlation between some crops, most notably corn and soybeans, and the high prevalence of growing these 2 crops, we lacked statistical power to fully evaluate whether one or both of these major crops contributed to fungal sensitization. [...]this study represents one of the largest and most heterogeneous studies of fungal sensitization with regard to agricultural activities.