In this episode of Let's Talk Micro, we continue our gram-negative cocci series with a closer look at Moraxella catarrhalis—better known at the bench as the hockey puck bug.

We break down what makes this organism unique, from its classic sliding colony morphology to how it behaves in different patient populations. Is it a colonizer or a pathogen? The answer depends on the clinical context. We walk through its role in pediatric infections like otitis media and sinusitis, its significance in adults—especially in COPD—and how to interpret its presence in respiratory cultures.

As always, we tie it back to the bench, discussing identification clues, culture considerations, and what it means when you see this organism on your plate.

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In this week's episode, we continue our series on gram-negative cocci and take a closer look at two of the most important organisms: Neisseria meningitidis and Neisseria gonorrhoeae.

On the Gram stain, they may look the same—but clinically, they represent very different scenarios.

We walk through colonization, transmission, and key virulence factors, and connect them to the infections they cause—from meningitis and invasive disease to mucosal and disseminated gonococcal infections.

We also bring it back to the bench, discussing specimen source, testing approaches like NAAT and culture, and how to think through these organisms in real-world laboratory settings.

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In this episode we continue our gram-negative cocci series by moving beyond the plate and into modern identification methods.

From traditional systems like VITEK and RapID NH to MALDI-TOF and molecular testing, we explore how these organisms are identified in today's clinical microbiology lab. We also break down the role of NAATs and syndromic panels in detecting organisms like Neisseria meningitidis and Neisseria gonorrhoeae, especially in situations where culture may be delayed or negative.

This episode focuses on how these tools fit into real-world workflows—highlighting their advantages, limitations, and how to interpret results at the bench.

Stay connected with Let's Talk Micro:

• Website: letstalkmicro.com

• Questions or feedback? Email me at letstalkmicro@outlook.com

• Interested in being a guest on Let's Talk Micro? Fill out the form here: https://forms.gle/V2fT3asjfyusmqyi8

Support the podcast:

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