![Rich Davis, PhD, D(ABMM), MLS🧫🦠 on X: "#MicroRounds (Day 654): It's late, so here's a classic: Lactose-fermenting Escherichia coli on MacConkey agar. A very routine selective/differential agar, it inhibits most Gram pos. Rich Davis, PhD, D(ABMM), MLS🧫🦠 on X: "#MicroRounds (Day 654): It's late, so here's a classic: Lactose-fermenting Escherichia coli on MacConkey agar. A very routine selective/differential agar, it inhibits most Gram pos.](https://pbs.twimg.com/media/EVN2NXXU0AEVZgJ.jpg:large)
Rich Davis, PhD, D(ABMM), MLS🧫🦠 on X: "#MicroRounds (Day 654): It's late, so here's a classic: Lactose-fermenting Escherichia coli on MacConkey agar. A very routine selective/differential agar, it inhibits most Gram pos.
![Lactose fermenting pink colonies of gram negative bacteria on MacConkey... | Download Scientific Diagram Lactose fermenting pink colonies of gram negative bacteria on MacConkey... | Download Scientific Diagram](https://www.researchgate.net/publication/342784015/figure/fig1/AS:911063654600705@1594225910966/Lactose-fermenting-pink-colonies-of-gram-negative-bacteria-on-MacConkey-agar-plate.png)
Lactose fermenting pink colonies of gram negative bacteria on MacConkey... | Download Scientific Diagram
![File:Lactose fementing (LF), and non-lactose fermenting (NLF) colonies on MacConkey agar.jpg - Wikimedia Commons File:Lactose fementing (LF), and non-lactose fermenting (NLF) colonies on MacConkey agar.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Lactose_fementing_%28LF%29%2C_and_non-lactose_fermenting_%28NLF%29_colonies_on_MacConkey_agar.jpg/1280px-Lactose_fementing_%28LF%29%2C_and_non-lactose_fermenting_%28NLF%29_colonies_on_MacConkey_agar.jpg)
File:Lactose fementing (LF), and non-lactose fermenting (NLF) colonies on MacConkey agar.jpg - Wikimedia Commons
![OLCreate: Fleming Fund E1 Isolating and identifying bacteria (human health): 4.3.1 Enterobacterales species | OLCreate OLCreate: Fleming Fund E1 Isolating and identifying bacteria (human health): 4.3.1 Enterobacterales species | OLCreate](https://www.open.edu/openlearncreate/pluginfile.php/574185/mod_oucontent/oucontent/65823/06501b96/87445600/fig_6.png)