"Gram-positive." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/gram-positive>.
Gram-positive. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/gram-positive
Relating to a group of bacteria that turn a dark-blue color when subjected to a laboratory staining method known as Gram's method. Gram-positive bacteria have relatively thick cell walls and are generally sensitive to the destructive effects of antibiotics or the actions of the body's immune cells. Gram-positive bacteria include beneficial nitrogen-fixing bacteria in soil, as well as the bacteria that cause anthrax, botulism, leprosy, tuberculosis, scarlet fever, and strep throat.