> Patrick Druggan wrote:
>> It is used to compare a selective medium (zb. XLD) with a non-
> selective medium (zb. TSA).
>> XLD should grow Salmonella well and there should be no-more than 0.5
> log10 difference in the plate counts compared to a non-selective
> medium like TSA.
>> A selective medium must be selective, and should inhibit the growth of
> non-pathogens. A reduction of 2 log10 in plated count on the selective
> medium when compared to a nonselective medium has been suggested as a
> standard.
>> This is covered in an ISO standard on microbiological methods. I think
> the number is ISO6358. Pd.
There is also a meaning in the number of colonies growing up by the
number of colonies you saw in the microscope, esp. if you are working
with fastidious bacteria or with very handling-sensitive bacteria (like
strict anaerobes) or after a threatning procedure. e.g. electroporation
or protoplasting and regeneration.
Wolfgang Schwarz
-------------- next part --------------
A non-text attachment was scrubbed...
Name: schwarz.vcf
Type: text/x-vcard
Size: 379 bytes
Desc: Card for Dr. Wolfgang Schwarz
Url : http://iubio.bio.indiana.edu/bionet/mm/microbio/attachments/20001116/f9ea7f17/schwarz.bin
