Dangerous bacteria

Discussion in 'Biology & Genetics' started by MarkE, Jan 16, 2015.

  1. MarkE Registered Member

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    It is known that some bacteria are dangerous ONLY when they're in the wrong place, f.i. E. Coli. Does anyone know some more examples?
     
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  3. cosmictraveler Be kind to yourself always. Valued Senior Member

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    School homework?
     
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  5. MarkE Registered Member

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    Nope, I don't go to school anymore

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    E. Coli's natural habitat inside the body is the lower intestine. That's his place, because outside it, he can be harmful. So it's not a harmful bacterium in defenition, only when it resides at the wrong place.

    I meant if there are any examples of other bacteria, who's natural habitat is f.i. the liver, and outside it, it can be harmful. Does anyone know such an example?
     
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  7. MarkE Registered Member

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    For instance, Prevotella, Sphingomonas, Streptococcus are bacteria that belong to our lungs. Bacteroides pneumosintes belong to our pharynx, Acinetobacter calcoaceticus and Acidaminococcus fermentans to our large intestines, Bacterionema matruchotii to our gingiva, Citrobacter freundii to our sputum, the list goes on and on. They are not dangerous in their own area, but my question is if some of them are, just like E. Coli, dangerous outside their own area, and instead, inside an other one.
     
  8. Fraggle Rocker Staff Member

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    90% of the cells in our bodies are bacteria, so obviously the vast majority of them are harmless--in fact many of them are symbiotic, so long as they stay in the right place.

    Since they are much smaller than our own cells, they only account for 1-2% of our body weight.
     
  9. Captain Covalency Registered Member

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    Well, the answer to your question depends on your wanted range of Bacteria. I assume you are referring/restricting to Mutualistic or Commensalistic Bacterium that are known to reside naturally in the Human Body specifically? You will have to clarify. If you are referring to any organism in the Domain Bacteria altogether, then the answer would simply be that any pathogenic Bacteria (Any Bacteria that causes disease) is harmful in the wrong place (The "wrong place" being the sector of the human body in which it causes the given disease).
     

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