How to Interpret MacConkey’s Agar Bacterial Growth Medium

This video provides photos and narrator interpretation of MacConkey’s Agar (MAC) specialized bacterial growth medium. Examples of sterile MAC as well as plates with growth of Gram-negative lactose fermenting bacteria and non-lactose fermenting bacteria. Video by Tami (Guy) Port, Chief Executive Nerd at . For the lab materials that go with this movie, see the Virtual Microbiology Classroom Bacterial Growth Media and Culture Laboratory Main Page at .