| exposure to airborne microorganisms, dust and endotoxin during processing of valerian roots on farms. | the aim of this study was to determine the levels of microorganisms, dust and endotoxin in the air during various stages of valerian (valeriana officinalis) roots processing by herb farmers and to examine the species composition of airborne microflora. air samples were collected on glass fibre filters by use of personal samplers on 15 farms owned by valerian cultivating farmers, located in lublin province (eastern poland). the concentrations of total viable microorganisms (bacteria + fungi) in t ... | 2005 | 16028876 |