by ADSA
Welcome to Dairy Digressions, the podcast from the American Dairy Science Association. Every other month, host Matt Lucy, PhD, explores the latest developments, fascinating discoveries, and breaking trends in the world of dairy science. From pioneering technologies to innovative research, we cover a range of topics related to the dairy industry and go behind the scenes of the top labs and minds in dairy research. Listen in as we dig deep into the science of dairy and discover what’s new and exciting in this ever-evolving field.
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March 29, 2025
<p>Join us as we sit down with <a href="https://kpe.utoronto.ca/faculty/moore-daniel" rel="ugc noopener noreferrer" target="_blank">Daniel Moore, PhD</a>, professor of muscle physiology at the University of Toronto and invited speaker at the ADSA Annual Meeting. He explains how muscle serves as the body’s primary storage for amino acids, the building blocks crucial for immune function, and emphasizes its importance beyond just physical strength into healthy aging and metabolic health. In his lab, he’s working to understand which foods—and which types of high-quality protein—can best support recovery and muscle development, with a focus on childhood. Are children just little adults, for example, or are they entirely different? How can nutrition best support them after exercise and help with the healthy muscle growth that will carry them into adulthood? Matt and Daniel discuss the importance of milk as a whole food rich in essential amino acids that can underpin this critical muscle development, focusing on his interest in leucine. He highlights the importance of teamwork and mentorship in his lab, sharing his strategies for fostering a supportive atmosphere for his students, drawing from his time in industry at Nestlé’s research center in Switzerland (including his experience being woken up by cowbells). Finally, the two digress on the fascinating topic of muscle preservation in hibernating animals and consider its potential relevance to dairy cows. </p><p><strong>Episode Twenty-Five Show Notes</strong></p><p>Learn more about <a href="https://kpe.utoronto.ca/faculty/moore-daniel" rel="ugc noopener noreferrer" target="_blank">Daniel Moore</a> and connect with him on <a href="https://www.linkedin.com/in/daniel-moore-a4915050/?originalSubdomain=ca" rel="ugc noopener noreferrer" target="_blank">LinkedIn</a>.</p><p>Are you interested in even more breaking dairy foods science? Join us at the<a href="https://www.adsa.org/Meetings/2025-Annual-Meeting" rel="ugc noopener noreferrer" target="_blank"> <strong>2025 ADSA Annual Meeting</strong> <strong>in Louisville, Kentucky, this June</strong></a>!</p><p>The <a href="https://www.journalofdairyscience.org/" rel="ugc noopener noreferrer" target="_blank">Journal of Dairy Science</a> is releasing a forthcoming special issue, Dairy Foods: A Matrix for Human Health and Precision Nutrition, in April. Look out for the latest research on this topic! </p><p><strong>Catch up on the papers, news articles, and podcasts discussed in the episode:</strong></p><p><a href="https://doi.org/10.1123/ijsnem.2024-0157" rel="ugc noopener noreferrer" target="_blank">Postexercise dietary leucine retention for whole-body anabolism is greater with whey protein isolate and fish-derived protein hydrolysate than nonessential amino acids in trained young men</a>, International Journal of Sport Nutrition and Exercise Metabolism (2024) </p><p><a href="https://www.nature.com/articles/s41390-023-02587-1" rel="ugc noopener noreferrer" target="_blank">Estimation of skeletal muscle mass in 4-year-old children using the D3-creatine dilution method</a>, Pediatric Research (2023) </p><p><a href="https://doi.org/10.1139/apnm-2022-0373" rel="ugc noopener noreferrer" target="_blank">Protein quality and the food matrix: Defining optimal versus maximal meal-based protein intakes for stimulating muscle protein synthesis</a>, Applied Physiology, Nutrition, and Metabolism (2023) </p>
February 11, 2025
<p>Since our last episode devoted to the highly pathogenic avian influenza (HPAI) H5N1 outbreak in US dairy herds, the virus has passed some concerning new milestones—infecting over 900 herds, more than 60 people (including 1 death), and millions of domestic poultry flocks—and continues to present a pressing concern to dairy scientists and the dairy sector as a whole. To help our listeners keep their finger on the latest science, Matt sits down with<a href="https://www.vet.cornell.edu/research/diego-diel-dvm-ms-phd">Diego Diel, DVM, MS, PhD</a>, a leading virologist and associate professor in the Department of Population Medicine and Diagnostic Sciences at Cornell University’s College of Veterinary Medicine. Diego and his lab team at Cornell were on the testing frontlines during the COVID-19 outbreak and are once again leading the charge in studying, documenting, and understanding H5N1—including via three impactful recent publications inJDS Communications andNature. He and Matt unpack the complexities of the H5N1 virus, explaining its unique components and genetic lineage, how it affects different cells across species, and tracking its evolution from wild birds to spreading in dairy cattle and spillovers to other avian and mammal hosts. The two discuss Diego’s recent work experimentally infecting dairy cows and calves to better understand the dynamics of the virus, detailing how it impacts the mammary gland, leading to severe mastitis and surprisingly high viral loads in milk. They review some of the remaining unknowns of the outbreak: Why haven’t we seen H5N1 in beef cattle? How is the virus spreading regionally from farm to farm? What is theexactroute of infection for dairy cows? Will vaccines be needed to stop its spread? The duo also cautiously explores the pandemic potential from the outbreak, outlining the current presentation of the virus in humans and clarifying that there is currently no human-to-human transmission. Thankfully, we have tools—such as antivirals that are effective against influenza in humans—in the toolbox to fight a pandemic if the virus were to mutate. While reassuring listeners that current data suggest a low risk, Diego emphasizes the importance of continued surveillance, testing, preventive measures, and research to understand how H5N1 might evolve.</p><p><strong>This episode of</strong><strong>Dairy Digressions</strong><strong> is a must-listen for anyone in the dairy sector seeking a comprehensive understanding of what we know today about the H5N1 outbreak.</strong></p><p> </p><p><strong>Episode Twenty-Four Show Notes</strong></p><p>Learn more about<a href="https://www.vet.cornell.edu/research/diego-diel-dvm-ms-phd">Diego Diel</a> and connect with him on<a href="https://www.linkedin.com/in/diego-diel-27300a39/">LinkedIn</a> and<a href="https://x.com/diel_diego">X/Twitter</a>. </p><p>Start earning rewards and journal savings via the <a href="https://www.adsa.org/Publications/Journal-Rewards"><strong>ADSA Loyalty Rewards Program</strong></a> for the <a href="https://www.journalofdairyscience.org/"><strong>Journal of Dairy Science</strong></a> and <a href="https://www.jdscommun.org/"><strong>JDS Communications</strong></a>.</p><p>Are you interested in participating in ADSA’s next AnnualMeeting?<a href="https://www.adsa.org/Meetings/2025-Annual-Meeting/Abstracts"><strong>Submit your abstract</strong></a> before<strong>February 12, 2025</strong>, and<a href="https://www.adsa.org/Meetings/2025-Annual-Meeting"><strong>join us in Louisville, Kentucky, this June</strong></a>!</p><p><strong>Catch up on the papers, news articles, and podcasts discussed in the episode:</strong></p><p><a href="https://doi.org/10.3168/jdsc.2024-0638">Hot topic: Influenza A H5N1 virus exhibits a broad host range, including dairy cows</a>,JDS Communications(2024)</p><p><a href="https://doi.org/10.1038/s41586-024-07849-4">Spillover of highly pathogenic avian influenza H5N1 virus to dairy cattle</a>,Nature(2024)</p><p><a href="https://www.nature.com/articles/s41586-024-08063-y">H5N1 clade 2.3.4.4b dynamics in experimentally infected calves and cows</a>,Nature(2025)</p><p><a href="https://www.nature.com/articles/s41586-024-08054-z">The global H5N1 influenza panzootic in mammals</a>,Nature (2025)</p><p><a href="https://www.science.org/content/article/why-hasn-t-bird-flu-pandemic-started">Why hasn’t the bird flu pandemic started?</a>,Science(2024)</p><p><a href="https://www.nytimes.com/2025/01/06/health/bird-flu-death-louisiana.html?unlocked_article_code=1.o04.M27z.lI1d55sMrFRo&smid=url-share">First bird flu death in U.S. reported in Louisiana</a>,New York Times(2025)</p><p><a href="https://www.idsociety.org/multimedia/videos/idsa-media-briefing-update-bird-flu-in-the-united-states/">Update: Bird flu in the United States</a>, Infectious Diseases Society of America (2025)</p><p><a href="https://www.nature.com/articles/s41586-024-08246-7">Transmission of a human isolate of clade 2.3.4.4b A(H5N1) virus in ferrets</a>,Nature(2024)</p><p><a href="https://www.nature.com/articles/s41586-024-08254-7">A human isolate of bovine H5N1 is transmissible and lethal in animal models</a>,Nature(2024)</p><p><a href="https://doi.org/10.1126/science.adt0180">A single mutation in bovine influenza H5N1 hemagglutinin switches specificity to human receptors</a>,Science (2024)</p><p><a href="https://www.cell.com/cell/fulltext/S0092-8674(24)00901-2">Genetic tracing of market wildlife and viruses at the epicenter of the COVID 19 pandemic</a>,Cell(2024) </p>
January 15, 2025
David Yáñez-Ruiz, PhD, and André Bannink, PhD, share groundbreaking research on methane-reducing feed additives that modulate production to significantly lower emissions without impacting animal health or milk quality.
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