Introduction: Water-based metalworking fluid (MWF) provides a suitable environment for microbes to grow. This study aimed at identifying the level and species of microbial contamination of MWF in a metal machining factory and to determine the corresponding Immunoglobulin G (IgG) levels in the workers’ blood samples. Methods: Total of 298 workers in the production section of a metal machining factory, the production section using MWF as coolant fluid, were involved in this study. The Analytical Profile Index system was used to identify the species of microbes isolated from MWF bulk and air samples. Tryptone soya agar was used to incubate unknown bacteria, and sabouraud dextrose agar was used for unknown fungi. The level of IgG antibodies in workers’ blood were measured as an indicator of the exposure to the microbes isolated from MWF, corresponded to the microbial species isolated from MWF. Results: The most dominant microbes isolated from the channels were Candida albicans, Klebsiella pneumoniae, E. coli and Pseudomonas aeruginosa. A total of 21 (34.4%) workers were positively exposed to E. coli, 30 (42.2%) to Pseudomonas aeruginosa, and 45(75%) exposed to Candida albicans. Also, the mean level of optic density of IgG to Klebsiella pneumoniae was 0.415 (0.02). Conclusion: Water-based metalworking fluid in this metal machining factory was contaminated with bacteria and fungi. The workers in the production section were exposed to MWF as well as the microbes present in MWF. The level of IgG in blood was the biomarkers for occupational exposure to microbial contaminant MWF.
Occupational exposure

Humans ; Occupational Exposure ; Occupational Health

Humans ; Noise, Occupational ; Occupational Exposure

Contact urticaria refers to a wheal-and-flare response after cutaneous exposure to certain chemicals. If contact urticaria is accompanied by systemic symptoms, it is referred to as contact urticaria syndrome. Herein we report two cases of contact urticaria syndrome occur-ring in nurses due to occupational exposure to cefotiam.
Cefotiam ; Occupational Exposure ; Urticaria*

No abstract available.
Gonads* ; Occupational Exposure*

No abstract available.
Occupational Exposure* ; Trichloroethylene*

Humans ; Occupational Exposure ; Railroads

Carcinogens ; Occupational Exposure

This paper focuses on the origin of the concepts of occupational exposure limit, and traces the history and development of thoughts and regislations of various countries and organizations concerning the founding principles upon which it is based. The concepts of establishing standards for occupational chemicals in workplace air constitute a social consensus or agreement about acceptable levels of occupational hygiene. The level of scientific development of a country and the discussion of experts in the field of occupational health play an important role. The physician in occurational health has to be especially concerned to discover and estimate the risks to anyone particularly susceptible to exposures within the hygienically acceptable conditions.
Carcinogens ; Consensus ; Hygiene ; Occupational Exposure* ; Occupational Health

Air Pollutants, Occupational ; Humans ; Occupational Exposure ; Styrene