© 2026
NPR News, Colorado Stories
Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations
In the NoCo

Venomous snakes kill thousands worldwide each year. A UNC professor’s search for a better antivenom could help save lives

Stephen Mackessy, a man with blonde hair and beard and wearing a checkered button-down shirt, holds a rattlesnake as it bites a plastic cup, allowing yellow venom to drain into the cup.
Stephen Mackessy
/
University of Northern Colorado
Stephen Mackessy, a biology professor at the University of Northern Colorado, holds a rattlesnake from the Yucatan in Mexico as its venom is extracted into a plastic beaker.

For people in much of the world, snakebite is a life-threatening condition.

We don't think about it much in Colorado — though it may be more top of mind this spring, since the warm winter is prompting rattlesnakes to emerge from their dens a little earlier than usual. Here, a nasty rattlesnake bite might send the occasional hiker to the emergency room.

But the World Health Organization estimates that, around the globe, as many as 138,000 people die from venomous snakebites each year. And while antivenom can be used to treat snakebite, it’s often costly and difficult to produce.

An expert at the University of Northern Colorado in Greeley hopes to change that.

Biology professor Stephen Mackessy is part of an international team that recently announced a breakthrough in the production of antivenom. The new technology could save lives by making antivenom cheaper to manufacture — and available in larger quantities.

Mackessy and his team recently published their findings in the journal Nature. He spoke with Erin O’Toole in November about the important research happening at his lab in Greeley that led to the breakthrough. We’re listening back to that conversation today.

If you enjoyed this interview, check out this In The NoCo conversation with the retiring director of the Rocky Mountain Poison Center, whose work helped develop a better antivenom to treat rattlesnake bites.

KUNC's In The NoCo is a daily slice of stories, news, people and issues. It's a window to the communities along the Colorado Rocky Mountains. The show brings context and insight to the stories of the day, often elevating unheard voices in the process. And because life in Northern Colorado is a balance of work and play, we celebrate the lighter side of things here, too.
Brad Turner is an executive producer in KUNC's newsroom. He manages the podcast team that makes In The NoCo, which also airs weekdays in Morning Edition and All Things Considered. His work as a podcaster and journalist has appeared on NPR's Weekend Edition, NPR Music, the PBS Newshour, Colorado Public Radio, MTV Online, the Denver Post, Boulder's Daily Camera, and the Longmont Times-Call.
As the host of KUNC’s news program and podcast In The NoCo, I work closely with our producers and reporters to bring context and diverse perspectives to the important issues of the day. Northern Colorado is such a diverse and growing region, brimming with history, culture, music, education, civic engagement, and amazing outdoor recreation. I love finding the stories and voices that reflect what makes NoCo such an extraordinary place to live.