Total RNA from bacteria : best methd?

Sergio sergioal at
Fri Feb 16 05:39:45 EST 2001

In our lab we use Tri-Reagent from Sigma (no aff.) on E.coli, Enterobacter,
Salmonella and different Pseudomonas, with very good yield. Yust a little
modification (actually i don't know whether the protocol from Sigma suggests it
or not), to lysis the cells we perform three cycles of freezing-thawing (using
liquid air), once the reagent is added. This improves the final result a lot. A
friend of mine uses a similar product from Roche with good results as well. I
guess both of them are very similar.


"Daniel.Marc" wrote:

> I am looking for the best method to purify total RNA from
> Salmonella and other Enterobacteriaceae. Has anybody some experience with
> this, and what would be the best method or the best reagent ?
> (Trizol, Tri-reagent, Qiagen, others...?
> Thank you very much in advance.
> Daniel MARC
> INRA - Centre de Tours
> 37380 Nouzilly
> marc at

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