Difference between revisions of "Infection"
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There are examples of bacteria growing in [[mutualism|mutualistic]] rather than parasitic fashion. The digestive systems of most organisms, including humans, depend on the presence of beneficial bacteria in order to properly digest food, especially plant matter. | There are examples of bacteria growing in [[mutualism|mutualistic]] rather than parasitic fashion. The digestive systems of most organisms, including humans, depend on the presence of beneficial bacteria in order to properly digest food, especially plant matter. | ||
| + | Infections may be defeated by the use of [[Antibiotics]], agents that can kill the bacteria that cause infections. In recent years, very powerful infections known as [http://www.mayoclinic.com/health/mrsa/DS00735<!--FSDD 4FSP TW55 GHS0 KKJ6--> Methicillin-resistant Staphylococcus aureus] or [[MRSA]] have wreaked havoc in hospitals around the world, as they are caused by bacteria that have become resistant to multiple drugs that had previously been used to combat them. | ||
==References== | ==References== | ||
<references/> | <references/> | ||
[[Category: Medicine]] | [[Category: Medicine]] | ||
Revision as of 16:32, May 9, 2008
An infection occurs when a parasitic organism colonizes a host organism and gains nourishment from the host.[1]
The term is most often used in reference to a bacterial infection, where a harmful opportunistic bacteria begins to grow in or on some part of an organism's body.
The term is also used in reference to viral infections, even though viruses are not "organisms" in the strictest sense of the word.
Because the parasite needs an opening in order to enter the hosts body, the host is especially vulnerable if it has recently scraped or cut its skin, although this is not at all necessary for an infection to occur.
There are examples of bacteria growing in mutualistic rather than parasitic fashion. The digestive systems of most organisms, including humans, depend on the presence of beneficial bacteria in order to properly digest food, especially plant matter.
Infections may be defeated by the use of Antibiotics, agents that can kill the bacteria that cause infections. In recent years, very powerful infections known as Methicillin-resistant Staphylococcus aureus or MRSA have wreaked havoc in hospitals around the world, as they are caused by bacteria that have become resistant to multiple drugs that had previously been used to combat them.