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serotype/strain definition

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

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serotype/strain definition

Postby biology_06er » Tue Jun 07, 2011 4:49 am

Hi there,

Sorry if this seems like a dumb question but I want to make sure I have the correct meaning of the word "serotype" and "strain"

Ok, so when talking about streptococcus A...many M type proteins exist..M1, M3, M6 etc...hence various SEROTYPES...but a STRAIN is a genetic variant within that serotype...eg..M3 has strains A, B, C where A expresses protein X, B expresses protein Y and C expresses protein Z.

Have I got this correct?

Thanks,
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Postby canalon » Tue Jun 07, 2011 2:28 pm

Yes.

Basically everytime I isolate a strain from a different environment, I will call it a new isolate. I can study its serotype and plenty of other characteristics, but as long as each isolation has been independant, they are different
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Postby JackBean » Tue Jun 07, 2011 2:44 pm

so serotype is superior to strain?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby canalon » Tue Jun 07, 2011 8:04 pm

Define superior?
But yes, there can be multiple strains of the same serotype, just like you have multiple serotype of the same species.
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Postby JackBean » Wed Jun 08, 2011 6:18 am

like genus is superior to species
http://www.biolib.cz/en/main/

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