Bacterial contamination of preserved and non-preserved metal working fluids

摘要: Abstract Metal working fluids (MWFs) are important facilities for certain industrial processes. Besides their advantage concerning the effective technical applicability it is disadvantageous that they excellent culture media bacterial and fungal growth may therefore act as an infectious source employees getting in contact with them. As a matter of prevention most MWFs nowadays treated preservatives to eliminate contamination possible human pathogenic bacteria fungi. Own investigations were concerned objectives actual long-term study preserved non-preserved from different MWF systems, development standardized biotope its efficacy which caused diseases humans, resistance against occurrence infections allergies MWFs. Our results show: high numbers can be found well MWFs, potential (category 2, TRBA 466) could almost exclusively Those besides others able develop biocides detected weeks months, stable biotopes controlled by artificial inoculation bacteria. induce there only very few data published or allergies. According our questionnaire 10% complain skin irritations/reactions. There was no difference nor clear cut correlation contact. These motivate more intensive epidemiological studies this field. The point out taking into consideration safe conditions even contaminated combination waterborne like Pseudomonas spec. up 108 CFU/ml alternative MFWs.