The Gram stain is one of the most trusted tools in clinical microbiology—but it doesn’t always tell the full story.
In this Micro Minutes episode, we break down why Gram stains can sometimes be misleading and how factors like culture age, antibiotic exposure, decolorization, morphology, and arrangement can change what you see under the microscope. We also touch on classic troublemakers like Acinetobacter and tiny coccobacilli such as Pasteurella and Haemophilus, and how careful observation can keep you from jumping to the wrong conclusion.
Short, focused, and straight from the bench—this episode is all about learning how to interpret Gram stains beyond just purple and pink.
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