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When people hear the word disease, it's easy to jump to the wrong conclusion. But MSX (Haplosporidium nelsoni) and Dermo (Perkinsus marinus) aren't diseases that affect people—they're diseases that affect oysters and the communities that depend on them.
In this episode of OYSTER-ology, host Kevin Cox sits down with three scientists from the Virginia Institute of Marine Science (VIMS) to explore what these oyster diseases are, how they affect both wild and farmed oysters, and why they're shaping oyster farming from the Chesapeake Bay to the current MSX outbreak in Prince Edward Island, Canada. Along the way, the conversation expands beyond biology to examine how growers, researchers, public agencies and coastal communities respond to uncertainty, adapt to changing conditions, and build resilience for the future. From oyster farmers and researchers to seafood professionals, policymakers, and oyster lovers alike, this conversation reminds us that behind every oyster is a remarkable story of science, adaptation, and resilience.
Guests
Dr. Bill Walton is the Acuff Professor of Marine Science at VIMS and works closely with shellfish growers to apply science to the practical challenges of oyster aquaculture.
Dr. Ryan Carnegie is a Professor at VIMS and one of North America's leading experts on oyster diseases, with research focused on shellfish pathogens, including MSX and Dermo.
Dr. Adriane Michaelis is an Assistant Professor at VIMS whose research explores the relationship between oysters, people, and place, with a particular focus on the resilience of coastal communities.
00:00 Crisis Stakes
00:27 Show Intro And Guests
03:29 What Is MSX
05:51 What Is Dermo
06:28 Water Quality Myths
07:46 Outbreak Signs On Farms
08:58 How Transmission Works
10:34 Diagnosis And Testing
12:14 What Farmers Can Do
14:27 Community Impacts And Pivots
17:03 Chesapeake MSX Resurgence
20:44 Public Perception And Marketing
23:11 Long Term Business Pressure
26:01 History Lessons And Tools
27:55 PEI Outbreak And Response
31:43 Resilience Beyond Disease
36:59 Big Picture Funding And Alliances
40:19 Industry Wide Risk Outlook
43:04 Final Advice And Key Takeaway
46:23 Closing And Thanks
Links:
- Bill Walton | Virginia Institute of Marine Science - Acuff Professor and Shellfish Aquaculture Program Coordinator at VIMS.
- Adriane Michaelis | Virginia Institute of Marine Science - Assistant Professor and Social scientist whose work explores the relationship between oysters, people, and place.
- Ryan B. Carnegie | Virginia Institute of Marine Science - Professor and Chair, Ecosystem Health at VIMS and internationally recognized expert in shellfish pathology.
- Virginia Institute of Marine Science (VIMS)
- Batten School of Coastal & Marine Sciences
- Canadian Atlantic Shellfish Health Network - For more information about MSX in Prince Edward Island, Canada.
Credits:
Guest: Dr. Adriane Michaelis, PhD; Dr. Bill Walton, PhD; Dr. Ryan Carnegie, PhD
Host: Kevin Cox
Digital Deckhand: Chet Jipty
Special Thanks To: Virginia Institute of Marine Science (VIMS) and Willian & Mary - Batten School of Marine Sciences
Production: OYSTER-ology Podcast
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