It also shows the results from the KOH string test. As you can see all test show that the bacteria is gram-positive. The KOH string test is supposed to determine either the bacteria is classified as gram-positive or gram-negative (Sadava, 2011). We dropped KOH with our bacteria and mixed it. After about a minute, we should have been able to tell if a string has formed or not. We have didn’t have a string form, so we had gram-positive bacteria and a negative string test result. We then did other tests because the string test has a high possibility for false negatives and results can be inconclusive. We swabbed out bacteria on different mediums such as: vancomycin, EMB-lactose, and PEA. There was no growth on vancomycin and EMB-lactose, which makes them gram-positive results. Gram-positive bacteria can’t grow on those two mediums (Leicht, 2015). The EMB-lactose agar has lactose and sucrose for energy. So the sugars are fermentable substrates, which only allow gram-negative bacteria to grow, not gram-positive (Cheeptham, 2014).