These could be S. aureus and/or Micrococci (orange-red). They do grow at 4C
Hiranya S. Roychowdhury, Ph.D. Associate Professor Health & Public Services NMSU-Dona Ana Community College 575 527 7725 (office) Co-Chair, Curriculum & Instruction Committee Human Anatomy and Physiology Society ________________________________________ From: methods-boun...@oat.bio.indiana.edu <methods-boun...@oat.bio.indiana.edu> on behalf of WS <novalidaddr...@nurfuerspam.de> Sent: Tuesday, May 6, 2014 4:48 AM To: meth...@magpie.bio.indiana.edu Subject: Yellow and Orange Colonies on Kan Plates?! Dear Colleagues, I have stored some bacterial plates with DH5a and HB2151 on 25ug/ml Kanamycin sealed in the fridge for 3-4 weeks. Now I'm noticing a few big yellow opaque colonies and more "standard sized" colonies which are orange and translucent. Any ideas what contaminants I might have acquired? Is it safe to open the dishes or should I better autoclave them as they are? Thanks for your comments WS _______________________________________________ Methods mailing list Methods@net.bio.net http://www.bio.net/biomail/listinfo/methods _______________________________________________ Methods mailing list Methods@net.bio.net http://www.bio.net/biomail/listinfo/methods
