Earwax of bacteria. Cerumen has been found to reduce the viability of a wide range of bacteria, including "Haemophilus influenzae", "Staphylococcus aureus", and many variants of "Escherichia coli", sometimes by as much as 99%. The growth of two fungi commonly present in otomycosis was also significantly inhibited by human cerumen. These antimicrobial properties are due principally to the presence of saturated fatty acids, lysozyme and, especially, to the slight acidity of cerumen (pH typically around 6.1 in normal individuals). Conversely, other research has found that cerumen can support microbial growth and some cerumen samples were found to have bacterial counts as
Body substance isolation known as body substance isolation. In 1996, both practices were replaced by the latest approach known as standard precautions (health care). Nowadays and in isolation, practice of body substance isolation has just historical significance. Body substance isolation went further than universal precautions in isolating workers from pathogens, including substances now currently known to carry HIV. These pathogens fall into two broad categories, bloodborne (carried in the body fluids) and airborne. The practice of BSI was common in Pre-Hospital care and emergency medical services due to the often unknown nature of the patient and his/her disease or medical conditions. It was