Usually , gram-positive bacteria are the helpful, probiotic bacteria we hear about in the news, like LAB. They are the happy ones that live in our gut and help us digests food (Behnes, et al; 2013). Gram-negative bacteria, by coincidence, are usually thought of as the nasty bugs that can make us sick and can be harmful. For example, several species of Escherichia coli (E. coli), are common causes of food-borne disease. Another example is Vibrio cholera, the bacteria responsible for cholera, is a waterborne pathogen (National Institute of Allergy and Infectious Diseases, 2012).