Lactose fermenting also , would be appreciated
In: Biology
So back in the bad old days, we needed a better way to tell the difference between the two ubiquitous Gram-positive cocci: Staphylococcus and Streptococcus.
If you pour hydrogen peroxide on a bacterial culture, you can tell the difference! Staph will bubble. Strep will not. The bubbling is due to an enzyme called catalase which all Staph species have but no Strep species does.
Since then, several more catalase positive organisms have been discovered. It remains a useful way to categorize bacteria, though it’s no longer useful for identifying them since the development of better techniques.
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