P1: you must explain how infections are caused by, bacteria, viruses, fungi and parasites.

1998 Words Mar 1st, 2014 8 Pages
P1: you must explain how infections are caused by, bacteria, viruses, fungi and parasites.
P2: you must explain how pathogenic microorganisms grow and spread.
In this assignment I am going to explain how infections are caused by, bacteria, viruses, fungi and parasites. I will then explain how pathogenic microorganisms grow and spread.
Infection is the process where germs enter a susceptible area in the body, where they multiply, resulting in disease.
Colonisation is where microbes are present on or in the body, where they grow and multiply without invading the surrounding tissues. An example of this is the bacteria that cause MRSA will often live harmlessly on the skin and in the nose of people without causing any harm at all to
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A lot of virus infections are obtained through inhalation of infectious droplets, the common cold virus is an example of this.
A common way of spreading gastrointestinal infections is through the faecal-oral route, examples of this include typhoid, cholera, dysentery, hepatitis A and poliomyelitis which are all obtained through drinking water contaminated with for example human faeces.
The pathogens which cause venereal diseases are vulnerable. They die rapidly when exposed to conditions outside of the body. For them to be able to spread, these pathogens need the most intimate of human contact.
Infections can be passed on through direct inoculation. Intravenous drug users who share dirty needles with others risk getting hepatitis and HIV infection because of the direct inoculation of blood from someone who is infected.
Airborne infections are one that is contracted due to the inhalation of microorganisms or spores suspended in the air on water droplets or dust particles. Airborne infection: Legionella Pneumophila causes Legionnaire’s disease which is found in many natural water sources but is commonly associated with poorly maintained air conditioning systems or rarely cleaned shower heads. Airborne droplets from these sources are the cause for Legionnaire’s disease.
Pathogenic microorganisms which are directly transmitted when contaminated drinking water is consumed are waterborne diseases. Contaminated water can be the cause of diseases such

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