The Causes and Spread of Infections Essay examples

1363 Words Aug 23rd, 2013 6 Pages
UNIT 4222-265

The causes and spread of infection

Outcome 1: understand the causes of infection

Bacteria are a very small, self-sufficient, one-celled organism that thrives in a variety of environments. However, many bacteria thrive in the mild 98.6 health body environment, some of these environmentally content bacteria in your body are actually good for you; its only 1% that isn’t.
Some examples of the sicknesses that bacteria cause are; * Impetigo * Meningitis * Tuberculosis * UTI (urinary tract infections) * Conjunctivitis * Gastroenteritis

A virus is a capsule containing genetic material, even smaller than bacteria. The main task of virus is to reproduce. However, viruses need a suitable host to
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The growths of micro-organisms also require the proper ph. The micro-organisms that prefer a neutral pH are referred to as neutrophils, or neutral-loving micro-organisms. The bulk of the human pathogens are within this group.
Temperature is another factor; Mesophilic bacteria and fungi have optimal growth at temperatures of 25-45c.A large majority of human pathogens mesophilic, because they prefer body temperature. Thermophilic micro-organisms (heat loving) grow at temperatures greater than 45c.Psychrophilic micro-organisms grow at temperatures below 20c. It’s useful to know what types of micro-organisms prefer what temperatures so then it can help you to pin point the origin of an infection.
There are 4 main routes for infections to transmit into the body: * Ingestion – food and drink or other infected products that are swallowed and infect the stomach or bowels. Most people have experiences an upset stomach which we notice with vomiting and diarrhoea. * Inhalation – coughs, colds, flu and other common airborne infections are contracted this way. * Inoculation – one of the many functions of our skin is to act as a barrier against infection. Anything that may penetrate the skin, or for that matter the mucous membrane that lines the mouth or nose, provides a route for infection to

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