When Microbes Step Into the Agar Arena If you’ve ever looked at a Deoxycholate Citrate Agar (DCA) plate, you’ve seen a microbiological showdown in action — and it’s none other than Salmonella vs. Shigella! These two intestinal pathogens may cause similar clinical pictures, but their personalities (and colonies) couldn’t be more different when it comes to biochemical flair. 🎭 Meet the Contenders 🥇 Salmonella — The Sulfur Slayer:This bold bacterium struts across DCA plat