USGS Develops Rapid DNA Test for Invasive Snakes
Researchers use CRISPR technology to identify brown tree snakes within minutes to prevent spread in the Pacific.
Updated on Oct. 24, 2026 in Life Sciences
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The USGS has developed a rapid field-ready DNA test to detect invasive brown tree snakes, utilizing a combination of loop-mediated isothermal amplification and CRISPR-Cas technologies. Published on August 4, 2026, the test aims to enhance biosecurity efforts across Pacific transportation hubs.
Why it matters
Current laboratory testing methods for brown tree snake DNA can take weeks, leaving critical gaps in biosecurity. This rapid detection tool is essential for preventing the accidental transport of snakes from Guam to vulnerable areas like Hawaii and the Commonwealth of the Northern Mariana Islands.
The diagnostic system integrates loop-mediated isothermal amplification with CRISPR-Cas technology, utilizing the eBrCas12b enzyme to facilitate detection in a single reaction. Researchers plan to freeze-dry the assay to ensure stability during deployment at field inspection sites.
The players
United States Geological Survey
This federal scientific agency provides data and research to manage ecosystems and natural resources across the United States and its territories.
University of Otago
Based in New Zealand, this research institution collaborated on the development of the genetic diagnostic tools.
Joint Region Marianas
This unified command oversees military installations in Guam and provides funding support for local ecological research and invasive species management.
The details
Brown tree snakes, which were introduced to Guam after the Second World War, have decimated native bird populations and caused frequent power outages by interfering with electrical infrastructure. This new test is designed to provide rapid identification of genetic material, allowing officials to monitor potential entry points more effectively.
Timeline
The brown tree snake was introduced to Guam following the Second World War.
A project update regarding the rapid test was published on August 4, 2026.
The Big Picture
This diagnostic breakthrough advances the goals of the USGS Ecosystems Mission Area by replacing slow, legacy laboratory identification processes. It marks a shift toward mobile, field-ready genetic surveillance as a primary tool for protecting sensitive island ecosystems from invasive threats.
This technology could provide a blueprint for rapid field identification of other invasive species, potentially speeding up quarantine and inspection protocols. By stabilizing assays through freeze-drying, it offers a scalable solution for managing biosecurity in remote island territories.
The takeaway
The development of rapid, field-deployable DNA testing highlights the essential role of molecular technology in modern biosecurity operations. By shortening detection times, authorities can better safeguard transportation hubs against the unintended spread of invasive predators.
Further reading
Learn more about ongoing genetic research at Life Sciences.
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Do you support increasing funding for technologies designed to prevent the spread of invasive species?
