ken77 Posted April 18, 2014 Share Posted April 18, 2014 Hi, I have found a haze zone around antibiotic disk when testing via disk diffusion. Would you class this antibiotic active or inactive? Regards Link to comment Share on other sites More sharing options...
Micro.Pete Posted September 27, 2014 Share Posted September 27, 2014 Hi, If you find a haze around your DD, and it appears to be bacteria (try to scrub it with a inoculation needle), it means the antibiotic isn't working against this microorganism.That applies only when you work with a clean isolate (when you have only 1 bacterial species). Because if you work with a mix culture, you can't be certain in 100% that the haze came from your tested bacteria or from other species in the mix culture. Link to comment Share on other sites More sharing options...
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