The purpose of this work was to evaluate the health effects due to biological exposure within different activities performed by groups of urban cleaning workers (UCW) compared to each other and to a control group of railway workers in Sao Paulo, 2007. Functional groups of UCW were submitted to interviews, blood counts, tests of inflammatory activity, serologic markers of infection, and stool parasitological testing. The final evaluation included 217 participants. The Control group reported lower vaccine protection against tetanus, whereas the Sweepers reported the lowest vaccine protection against hepatitis B. Drivers reported more antibiotic use and showed higher total leukocyte counts when compared to Controls. Drivers also demonstrated higher neutrophils and monocytes counts when compared to Sweepers. There was a higher presence of stool parasites among Sweepers and Collectors when compared to Controls. There were also no differences in indicators of respiratory infections or increased measurable inflammatory activity between Collectors, Landfills, and Intermediate Stations workers when compared to Controls. There were no differences in the number of sinusitis or pneumonias episodes, as well as serologic markers for inflammatory activity, contact with hepatitis B virus or anti-streptolysin O among studied groups.
solid wastes; occupational health; exposure to biological agents
