Healthcare associated infections (HCAI’s) are infections that develop in a patient, as a direct result of receiving healthcare, either in hospital or in a community setting. Infection is the process where an infectious agent (microorganism) invades and multiplies in the body tissues of the host resulting in the person developing clinical signs and symptoms of infection (E.g. a wound, or another person it can cause an infection. Colonisation occurs in some 30% of the population and whilst the microorganisms cause no harm if they remain on the skin, if transferred to another site e.g. For example, the skin is normally colonised by coagulase negative Staphylococci and can also be colonised by pathogenic Staphylococcus aureus. The person colonised is also called ‘a carrier’. on the skin, mouth, intestines or airway) but are doing no harm and are not causing symptoms of infection. The difference between Colonisation and InfectionĬolonisation is when microorganisms, including those that are pathogenic, are present at a body site (E.g. Treatment of underlying disease, recognising high risk patients)
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