233: The Background Singers of Gram-Negative Cocci

In this episode of Let's Talk Micro, we close out our gram-negative cocci series by talking about the "background singers" of the group—the organisms that quietly show up on respiratory cultures and oral flora plates every day.

We explore the world of non-pathogenic Neisseria species, along with rod-shaped and coccobacillary Neisseria and Moraxella that break the classic gram-negative diplococci rule. From commensals and opportunistic pathogens to their role in respiratory cultures and bench identification, this episode focuses on how to think through these isolates in the clinical microbiology laboratory.

As always, we tie it back to the bench—because sometimes the organisms sitting quietly in the background still matter.

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