{"id":9177,"date":"2026-11-07T12:11:27","date_gmt":"2026-11-07T07:11:27","guid":{"rendered":"https:\/\/vetnewsandviews.com\/en\/?p=9177"},"modified":"2026-11-07T12:11:28","modified_gmt":"2026-11-07T07:11:28","slug":"mit-silk-microneedles-fish-vaccination-aquaculture-research-2026","status":"publish","type":"post","link":"https:\/\/vetnewsandviews.com\/en\/mit-silk-microneedles-fish-vaccination-aquaculture-research-2026\/","title":{"rendered":"MIT Develops Silk Microneedles for Fish Vaccination"},"content":{"rendered":"\n
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VNV International Research Desk<\/strong>
\nResearch & Innovation | 7 November 2026
\nOriginal Research Published: 2 November 2026<\/p>\n\n

MIT Develops Water-Resistant Silk Microneedles for Underwater Fish Vaccination<\/h1>\n\n

Cambridge, Massachusetts, USA:<\/strong>\nResearchers at the Massachusetts Institute of\nTechnology (MIT) and the United States Department\nof Agriculture (USDA) have developed a new\nmicroneedle platform designed to deliver vaccine\nmaterials to farmed fish underwater.<\/p>\n\n

The technology uses food-grade silk-based\nmicroneedles with a water-resistant coating,\nallowing them to penetrate wet fish skin,\nremain attached temporarily and release\ntheir contents in a controlled manner.<\/p>\n\n

The research was published online on\n2 November 2026 in the peer-reviewed journal\nACS Nano<\/em>.<\/p>\n\n

Why Fish Vaccination Remains a Challenge<\/h2>\n\n

Disease outbreaks are a persistent challenge\nfor aquaculture producers. Vaccination offers\na preventive approach, but administering\nvaccines to large numbers of fish can be\nlabour-intensive and technically demanding.<\/p>\n\n

Conventional injection methods often require\nhandling, sedation and removal of fish from\nwater. These processes can increase operational\ncosts and cause stress to the animals.<\/p>\n\n

Vaccinating juvenile fish presents an\nadditional challenge because their small size\nlimits the practicality of traditional\ninjection techniques.<\/p>\n\n

How the New Silk Microneedle Technology Works<\/h2>\n\n

The researchers engineered microneedles\nusing silk fibroin, a protein-based material,\nand developed water-resistant structures\ncapable of functioning underwater.<\/p>\n\n

A shellac-based protective coating helps\nlimit premature exposure to water, allowing\nthe microneedles to maintain their structure\nbefore delivering their contents.<\/p>\n\n

The research investigated three microneedle\ndesigns: shell, solid-tip and hollow\nconfigurations. These were evaluated for\nmechanical performance, water resistance,\nmaterial compatibility and release behaviour.<\/p>\n\n

Experimental Delivery to Very Small Fish<\/h2>\n\n

In preliminary animal studies, the\nmicroneedles were evaluated using zebrafish\nand juvenile rainbow trout.<\/p>\n\n

The researchers demonstrated underwater\ndelivery of vaccine-related materials to\nrainbow trout weighing approximately\n1 to 2 grams.<\/p>\n\n

This is notable because conventional\nneedle-based vaccination is difficult\nin very small juvenile fish and is\ntypically more practical once fish\nreach substantially greater body weight.<\/p>\n\n

However, successful delivery of vaccine\nmaterials should not be confused with\ndemonstrated protection against disease.<\/p>\n\n

Controlled Release and Material Stability<\/h2>\n\n

The researchers investigated microneedle\nconfigurations capable of releasing their\ncontents over different periods, ranging\nfrom minutes to several hours.<\/p>\n\n

The study also examined the stability of\nDNA plasmid material carried by the\nmicroneedles during dry storage.<\/p>\n\n

Under the tested conditions, at least\nhalf of the loaded plasmid material\nretained its supercoiled structure\nafter four weeks outside the cold chain.<\/p>\n\n

This result suggests potential advantages\nfor future vaccine distribution systems,\nalthough further studies will be required\nto establish practical storage requirements\nfor commercial products.<\/p>\n\n

Could the Technology Improve Aquaculture Health?<\/h2>\n\n

If further research confirms vaccine\neffectiveness, safety and operational\nfeasibility, underwater microneedle\ndelivery could provide an additional\noption for preventive fish health\nmanagement.<\/p>\n\n

Potential applications include\njuvenile fish vaccination,\nreduced handling requirements\nand more flexible delivery\nof selected biological materials.<\/p>\n\n

Large-scale application will depend on\nfurther evaluation of vaccine-induced\nimmunity, fish welfare, manufacturing\ncosts, administration methods and\nenvironmental considerations.<\/p>\n\n

Research Limitations<\/h2>\n\n

The technology remains experimental.\nThe published findings establish\nimportant material and delivery\ncapabilities but do not demonstrate\ncommercial-scale disease prevention.<\/p>\n\n

The results must not be interpreted as\nevidence that the microneedles provide\ncomplete protection against fish\ninfections or eliminate the need\nfor established biosecurity measures.<\/p>\n\n

Additional controlled trials will be\nnecessary before routine farm-level\nimplementation can be considered.<\/p>\n\n

VNV Insight: Relevance for Pakistan’s Aquaculture Sector<\/h2>\n\n

Pakistan’s aquaculture and fisheries\nsectors face increasing demands for\nbetter fish health management, improved\nproduction efficiency and sustainable\ndisease prevention.<\/p>\n\n

The MIT\u2013USDA research offers a useful\ndirection for veterinary universities,\nfisheries research institutes and\naquaculture businesses interested\nin emerging vaccine delivery systems.<\/p>\n\n

Local research would be needed to\ndetermine whether similar approaches\ncould be suitable for commercially\nimportant species farmed in Pakistan,\nincluding carps and tilapia.<\/p>\n\n

Differences in fish species, skin\ncharacteristics, farming conditions,\npathogens and vaccination requirements\nmust be considered before drawing\nconclusions about local applications.<\/p>\n\n

Why This Research Matters<\/h2>\n\n

The broader significance of this study\nlies in its potential to connect\nbiomaterials engineering with aquatic\nanimal health and preventive veterinary\nmedicine.<\/p>\n\n

It also highlights opportunities\nfor collaboration among materials\nscientists, fish health specialists,\nveterinary researchers and\naquaculture producers.<\/p>\n\n

Original Research Credits<\/h2>\n\n

Research paper:<\/strong>\nDesign of Water-Resistant, Food-Grade\nMicroneedles for Fish Injection and\nUnderwater Cargo Delivery<\/p>\n\n

Authors:<\/strong>\nMeng Li, Jad Raad, Yunteng Cao,\nYue Hu, Colleen Wolfe, Doyoon Kim,\nBradley D. Frank, Gregory D. Wiens\nand Benedetto Marelli.<\/p>\n\n

Research institutions:<\/strong>\nMassachusetts Institute of Technology\nand USDA Agricultural Research Service,\nwith collaborating researchers.<\/p>\n\n

Journal:<\/strong> ACS Nano<\/p>\n\n

Publisher:<\/strong>\nAmerican Chemical Society<\/p>\n\n

Published online:<\/strong>\n2 November 2026<\/p>\n\n

DOI:<\/strong>\n10.1021\/acsnano.6c06013<\/p>\n\n

Research support:<\/strong>\nMIT Abdul Latif Jameel Water and Food\nSystems Lab and the US Department\nof Agriculture.<\/p>\n\n

Researcher Contact<\/h2>\n\n

Professor Benedetto Marelli<\/strong>
\nDepartment of Civil and Environmental Engineering
\nMassachusetts Institute of Technology
\nEmail:\n\nbmarelli@mit.edu<\/a><\/p>\n\n

Original Research and External Sources<\/h2>\n\n
    \n
  1. \n\nOriginal research article, ACS Nano\n<\/a>\n<\/li>\n\n
  2. \n\nMIT News: Original institutional research report\n<\/a>\n<\/li>\n\n
  3. \n\nProfessor Benedetto Marelli: Official MIT profile\n<\/a>\n<\/li>\n<\/ol>\n\n

    Related VNV Research Coverage<\/h2>\n\n