Workplace safety has taken on significant new meaning during the past decade, particularly in the area of waste treatment, hospitals and health care. The increasing frequency of communicable diseases such as AIDS and hepatitis have placed workers at high risk. This manual provides health care professionals with the means to design a practical programme for testing biological specimens in the workplace environment. It explores both the benefits and limitations of testing for dangerous levels of toxic material in bodily tissues and fluids. Questions and answers at the end of each chapter provide a more thorough understanding of each topic.