Ico 2 Essay

707 WordsJun 22, 20153 Pages
Causes & Spread of Infection The differences between bacteria, viruses, fungi and parasites are bacteria are a lot larger than viruses and have their own cellular make up that lets them live and multiply without a host, others have adapted to do so within a host such as humans where they gain energy from sugars, fats and proteins in the same way as humans. Bacteria can reproduce themselves from between every fifteen minutes to sometimes months apart. Viruses are different from others as they can't breed without being inside a host cell, this is because they do not feed but survive by living on the hosts own processes to gain sustenance and energy. Viruses are a lot smaller than bacteria and are mainly responsible for infectious diseases , both bacteria and viruses are known as microorganisms. Fungi are commonly found as spores and moulds and come in a wide range of shapes and sizes and can cause diseases in humans in the form of yeast, and can create complications such as athletes foot, ring worm and in some extreme cases pneumonia. Parasites come from the same family as fungi known as eukaryotes and are not true microorganisms, they are usually larger than bacteria and viruses and are similar to human cells having a single distinctive nucleus. Some like to survive inside a host organism while others will freely survive and flourish within a suitable environment. Some parasites are made up of one dominant cell while others are made up of many. Common illnesses and infections could include Salmonella, Pneumonia, Tuberculosis, Influenza, Measles, mumps, Malaria Scabies athletes foot and many more. Infection is an invasion of microorganisms that are not normally found in the human or animal body. An infection can cause symptoms which will require a GP consultation and the appropriate medications administered. Humans and animals have bacteria living in

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