Invasive snail species found in Georgia could harm humans
ATLANTA - The Georgia Department of Natural Resources is urging caution after invasive snail species in the state were found to harbor a parasite that can cause illness in humans.
What we know:
The Georgia Department of Natural Resources’ Wildlife Resources Division (WRD) is calling on anglers, boaters, and lake visitors to help prevent the spread of invasive snail species following the discovery that these snails can harbor rat lungworm, a parasitic nematode that poses a potential health risk to humans if consumed.
In a recent collaborative study with Dr. Tyler Achatz’s parasitology lab at Middle Georgia College, WRD examined invasive apple and mystery snails collected from multiple locations around the state. Test results confirmed a low-level presence of rat lungworm in both species. The parasite can be transmitted to humans if the snails or slugs are eaten raw or undercooked.
What could happen
Why you should care:
While the likelihood of contracting rat lungworm is very low, infection can lead to eosinophilic meningitis, a serious condition that may result in severe complications or even death in rare cases. The Centers for Disease Control (CDC) notes that the parasite does not replicate in humans, and human-to-human transmission does not occur.
This is only the second time rat lungworm has been identified in Georgia. The first instance occurred in 2019, when the parasite was found in rats near the Atlanta Zoo. Although rat lungworm has been detected in invasive snails in other states, this is the first time it has been documented in snails in Georgia.
Where did they come from
The backstory:
Apple snails, native to South America, and mystery snails, native to Southeast Asia, Japan, and Russia, have been introduced into various states, including Georgia. Both species are illegal to possess in Georgia as of 2023, but officials remain concerned that people may still be moving or introducing these snails into public waters or handling them in ways that could pose health risks.
Invasive aquatic species like these snails can cause significant ecological and economic damage. They can harm vessels and boating equipment, impede access to water bodies, and disrupt natural ecosystems by displacing native species. This recent discovery also highlights the potential human health risks associated with invasive species.
Prevention is key
What you can do:
Prevention is key to reducing the risk of invasive species establishing populations in Georgia waters. The WRD encourages the public to:
- Thoroughly wash boats, trailers, and fishing gear after each outing.
- Avoid dumping aquariums into natural water bodies.
- Refrain from intentionally releasing non-native species into local waters.
For more information on invasive species and how to report sightings, visit GeorgiaWildlife.com/ans. To learn more about rat lungworm and its health implications, contact the CDC at Rat Lungworm Disease (Angiostrongylus) | CDC.