I did an antibacterial sensitivity test and cannot interpret it

I did an antibacterial sensitivity test with orange seed samples. I had difficulty determining the results because in the test results there was no clear inhibition zone but instead a foggy (unclear) zone appeared around the disc (on 20%, 30%, 40% samples). This indicates that my sample has an antibacterial effect but does not produce a clear inhibition zone so i cannot measure it. How should I interpret it?

Here are the results of the antibacterial sensitivity test.