The same enterococci; resistant/sensitiv in two media (trimethoprim)

sveske01 sveske01 at ODIN.MIMER.NO
Wed Apr 10 13:20:25 EST 1996

Hello !
My name is Sverre Skeidsvoll, 31 year old bio-engineer (student) in Norway.
It's the first time to visit this newsgroup. Great site !!

My problem is as follows:

We have used same enterococci to grow against trimethoprim in two different media.
Media nr.1 was from Mueller-hinten and showed enterococci sensitiv to trimethoprim !
Media nr.2 was from Gibco and showed the same enterococci resistant to trimethoprim ! 

I cannot understand why this same bacteria is sensitiv and then resistant in two media
that should be the same. Different agar ?

Please help me !

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