{"id":38819,"date":"2026-04-27T08:48:27","date_gmt":"2026-04-27T12:48:27","guid":{"rendered":"https:\/\/www.iff.com\/?p=38819"},"modified":"2026-04-27T09:10:01","modified_gmt":"2026-04-27T13:10:01","slug":"phage-resistance-research","status":"publish","type":"post","link":"https:\/\/www.iff.com\/es\/media\/stories\/phage-resistance-research\/","title":{"rendered":"Strengthening phage resistance of Streptococcus thermophilus by leveraging complementary defense systems"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/phage-resistance-research\/#Executive_Insight\" >Executive Insight<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/phage-resistance-research\/#Why_This_Research_Matters\" >Why This Research Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/phage-resistance-research\/#About_the_Authors\" >About the Authors<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/phage-resistance-research\/#Practical_Applications_in_Food_Biosciences\" >Practical Applications in Food Biosciences<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/phage-resistance-research\/#How_This_Research_Was_Conducted\" >How This Research Was Conducted<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/phage-resistance-research\/#Explore_the_Full_Scientific_Paper\" >Explore the Full Scientific Paper<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-executive-insight\"><span class=\"ez-toc-section\" id=\"Executive_Insight\"><\/span>Executive Insight<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bacterioiophage disruption remains one of the most persistent risks to industrial dairy fermentations. This research demonstrates that layering multiple bacterial defense systems can significantly strengthen phage resistance in <em>Streptococcus thermophilus<\/em> without compromising strain performance. The findings highlight practical, scalable strategies for improving fermentation robustness in dairy manufacturing environments where phage pressure is unavoidable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This breakthrough enables the design of more robust starter <a href=\"https:\/\/www.iff.com\/es\/food-beverage\/food-bioscience\/cultures\/\" target=\"_blank\" rel=\"noreferrer noopener\">cultures<\/a>, reducing product loss, raw material waste, and economic damage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IFF scientists demonstrate to be at the forefront of R&amp;D and innovation, driving solutions that protect food and support sustainable production. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-this-research-matters\"><span class=\"ez-toc-section\" id=\"Why_This_Research_Matters\"><\/span>Why This Research Matters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-hear-more-from-the-expertsexpert-contributor-dr-damian-magill\"><em>Streptococcus thermophilus<\/em> is foundational to dairy production worldwide. While CRISPR-Cas systems have long been used to improve phage resistance, phages continue to evolve counter\u2011-defense\u2011 mechanisms that threaten fermentation consistency.<br>This study shows that combining CRISPR-Cas with additional, naturally occurring defense systems can strengthen strain resilience without negatively impacting\u2011 fermentation performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-about-the-authors\"><span class=\"ez-toc-section\" id=\"About_the_Authors\"><\/span>About the Authors<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-hear-more-from-the-expertsexpert-contributor-dr-damian-magill\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-hear-more-from-the-expertsexpert-contributor-dr-damian-magill\">This research was conducted by an interdisciplinary team of academic scientists and IFF researchers specializing in microbial genetics, phage-host interactions, and industrial fermentation systems.<br>Read more on this research from them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-hear-more-from-the-expertsexpert-contributor-dr-damian-magill\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What new perspectives does this paper offer compared to earlier research?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Expert Contributor <a href=\"https:\/\/www.iff.com\/es\/experts\/dr-damian-magill\/\" type=\"team\" id=\"42848\">Dr. Damian Magill<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sr. Scientist II, R&amp;D &#8211; H&amp;B<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"811\" height=\"1024\" src=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/03\/P1220291-811x1024.jpg\" alt=\"\" class=\"wp-image-44671\" style=\"width:269px;height:auto\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/03\/P1220291-811x1024.jpg 811w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/03\/P1220291-238x300.jpg 238w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/03\/P1220291-768x970.jpg 768w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/03\/P1220291-158x200.jpg 158w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/03\/P1220291.jpg 833w\" sizes=\"auto, (max-width: 811px) 100vw, 811px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">This paper offers several new perspectives that both align with and extend earlier research. Notably:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It represents the first comprehensive study to map the full defensome of Streptococcus thermophilus, revealing a far broader repertoire of anti-phage systems than previously recognized.<\/li>\n\n\n\n<li>The work also experimentally validates the activity of these defenses against diverse phage types, demonstrating both broad and narrow spectrum specificities.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Compared to prior studies, a key advance lies in the application oriented investigations. In particular, the paper presents and evaluates a pyramiding strategy, in which multiple defense systems are stacked within a single strain. This approach outperforms the use of mixed <a href=\"https:\/\/www.iff.com\/es\/food-beverage\/food-bioscience\/cultures\/\">cultures <\/a>composed of strains carrying individual defenses, especially under conditions of high phage pressure. This finding is of direct industrial relevance, where implementing robust and reliable phage control strategies is critical.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In addition, the study examines the functionality and fitness impact of chromosomally integrated defense systems in their native genomic context. The results show that strong phage resistance can be achieved without compromising key industrial traits, such as milk acidification performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In what ways could this defensive approach reduce waste and operational costs for dairy producers?<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"441\" height=\"662\" src=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/02\/DRomero-1.jpg\" alt=\"\" class=\"wp-image-42177\" style=\"aspect-ratio:0.6661709861681537;width:232px;height:auto\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/02\/DRomero-1.jpg 441w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/02\/DRomero-1-200x300.jpg 200w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/02\/DRomero-1-133x200.jpg 133w\" sizes=\"auto, (max-width: 441px) 100vw, 441px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Expert Contributor <a href=\"https:\/\/www.iff.com\/es\/experts\/dr-dennis-a-romero\/\" type=\"team\" id=\"44298\" target=\"_blank\" rel=\"noreferrer noopener\">Dennis Romero<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sr. Lead Scientist, IFF Laureate &#8211; R&amp;D<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The industrial production of fermented <a href=\"https:\/\/www.iff.com\/es\/food-beverage\/dairy\/\">dairy<\/a> products is clean and sanitary, however, not sterile. Pasteurization by itself will not eliminate phage present in the environment, therefore the starter cultures are always at risk of infection if proper actions are not taken. When a phage infection occurs, it can result in longer processing times resulting in lost productivity and potential downgrades in end-product quality. In the worst-case scenario, complete loss of the fermentation and the milk has to be discarded. With the discovery and characterization of these new phage defense systems, we enhance our ability to further strengthen our starter strains and cultures to resist phage infection thereby ensuring consistent and uninterrupted operations.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-practical-applications-in-food-biosciences\"><span class=\"ez-toc-section\" id=\"Practical_Applications_in_Food_Biosciences\"><\/span>Practical Applications in Food Biosciences<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Advancing sustainable food systems through more robust microbial performance<\/li>\n\n\n\n<li>Designing starter cultures with layered, complementary phage defenses<\/li>\n\n\n\n<li>Improving fermentation reliability in industrial dairy manufacturing<\/li>\n\n\n\n<li>Reducing production downtime and economic loss caused by phage contamination<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-this-research-was-conducted\"><span class=\"ez-toc-section\" id=\"How_This_Research_Was_Conducted\"><\/span>How This Research Was Conducted<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Researchers analyzed 263 <em>Streptococcus thermophilus<\/em> genomes to identify known and previously untested phage defense systems. Selected systems were experimentally evaluated alone and in combination with CRISPR-Cas \u2011against dairy phages in both laboratory conditions and milk fermentation environments.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-explore-the-full-scientific-paper\"><span class=\"ez-toc-section\" id=\"Explore_the_Full_Scientific_Paper\"><\/span>Explore the Full Scientific Paper<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-official-paper-abstract\">Read the full peer\u2011reviewed publication in Nature Communications for detailed methods, data, and results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div class=\"wp-block-buttons alignwide is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.nature.com\/articles\/s41467-025-62408-3\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>READ THE FULL PAPER<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Executive Insight Bacterioiophage disruption remains one of the most persistent risks to industrial dairy fermentations. This research demonstrates that layering multiple bacterial defense systems can significantly strengthen phage resistance in Streptococcus thermophilus without compromising strain&#8230;<\/p>","protected":false},"author":69,"featured_media":38805,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[414,62],"tags":[330,422],"class_list":["post-38819","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bioscience","category-food-beverage","tag-food-biosciences","tag-scientific-papers"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.8 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Phage Resistance I Paper on Streptococcus thermophilus<\/title>\n<meta name=\"description\" content=\"Streptococcus thermophilus, one of the most widely used starter cultures in dairy fermentation, has multiple defense systems. 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