PMID: 15236510Jul 9, 2004Paper

Exposure of hop growers to bioaerosols

Annals of Agricultural and Environmental Medicine : AAEM
Anna GóraJacek Dutkiewicz

Abstract

Air sampling was performed during picking and sorting of hop (Humulus lupulus) cones on 19 hop farms located in eastern Poland. The concentration and composition of airborne microflora and the concentration of airborne dust and endotoxin were determined. Additionally, 7 samples of settled hop dust were collected and examined for the presence of microorganisms and endotoxin. Total concentrations of airborne microorganisms were within a range of 2.08-129.58 x 10(3) cfu/m(3). Gram-positive bacteria formed 22.2-96 % of the total count. Among them, prevailed corynebacteria and endospore-forming bacilli. Fungi constituted 3.7-65.4 % of the total count. The dominant species were Penicillium citrinum, Alternaria alternata, and Cladosporium epiphyllum. Thermophilic actinomycetes and Gram-negative bacteria were detected in the air of only 10 and 6 farms, respectively. Airborne dust concentrations at the workplace ranged from 0.17-31.67 mg/m(3). The concentrations of airborne endotoxin were in the range of 26-6250 ng/m(3). In the samples of settled dust, the concentrations of total microorganisms ranged from 0.25 x 10(6) to 2.87 x 10(8) cfu/g. Gram-positive and Gram-negative bacteria constituted respectively 3.2-98 % and 0-93.5 % of the t...Continue Reading

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