Immunologic status of agricultural workers in the region of Lombardy, Northern Italy

Purpose. Farming is associated with a wide variety of hazardous exposures including physical, chemicals and biological agents. Animal farmers are exposed to dust which contains microorganisms, mycotoxins, endotoxins, animal feed particles, allergens and chemical agents. Organic dust exposure is known to cause allergic and non-allergic rhinitis, and organic dust toxic syndrome. This study was undertaken to evaluate the relationship between occupational health hazards and serum pro-inflammatory cytokines among agricultural workers, in particular we investigated whether animal breeders react differently to biological agents than non breeder farmers. Methods. One hundred subjects working in agricultural enterprises in the region of Lombardy, were enrolled into the study in 2010. Serum cytokines including interleukin (IL)-6, IL-8, IL-10, IFNγ and tumor necrosis factor-α (TNFα) were measured. Cytokines were assessed by commercially available enzyme-linked-immunosorbent assay (ELISA). Results of the study. Compared to control subjects, increased TNF-α, IL-8, and IL-10 levels were found in animal breeders, and a statistically significant relationship between type of job (breeder/non breeder workers) and increased serum pro-inflammatory cytokines. Results suggest that animal breeders might be at higher risk of occupational diseases and biological hazards than other farmers with less contact to animals.