and maintenance workers in sewage or wastewater treatment plants may
be exposed to biosolids that contain bacteria, viruses, protozoa,
or parasitic worms (helminths), all of which can cause disease. A
report from the National Institute for Occupational Safety and Health
(CDC) explains the hazards and suggests ways to prevent disease, including
hygiene and work practices, PPE, and immunization for tetanus-dphtheria.