GDNR Officials Warn Invasive Snail Species In GA Could Be Deadly To Humans

     Georgia wildlife officials are raising alarms after detecting a dangerous parasite in two invasive snail species found statewide. The Georgia Department of Natural Resources (DNR) confirmed the presence of rat lungworm parasites in non-native apple snails and mystery snails, marking the first such discovery in the state’s aquatic ecosystems. While human infection risks remain low, the parasites can cause rare but severe illnesses, including eosinophilic meningitis and potentially fatal complications.

     Rat lungworm (Angiostrongylus cantonensis) – a nematode typically hosted by rodents – was identified in snails collected during a statewide study conducted with Middle Georgia State University. Humans can contract the parasite by consuming raw or undercooked snails.
Infections may lead to:

• Meningitis-like inflammation of brain membranes
• Nausea, fever, and neurological issues
• Rare fatalities, particularly in immunocompromised individuals

The CDC notes the parasite cannot replicate in humans, and person-to-person transmission is impossible.

Both snail species pose significant ecological and economic threats:

• Apple snails (South American origin) and mystery snails (Asian/Russian origin) aggressively outcompete native species.
• They damage aquatic vegetation critical for fish and amphibians.
• Large populations clog water intake systems, docks, and boat motors.

A reproducing population of Chinese/Japanese mystery snails was recently confirmed in Lake Lanier, a major recreational hub near Atlanta. 

• Identification: Brown spiral shells up to 2 inches long.
• Spread: Likely introduced via aquarium releases or food markets.
• Legality: Possessing live mystery or apple snails has been illegal in Georgia since 2023.

Officials urge the public to:

1. Clean gear: Thoroughly wash boats, trailers, and fishing equipment after use.
2. Avoid releases: Never dump aquarium species into waterways.
3. Report sightings: Submit photos and locations via Georgia DNR’s online portal.

     While the current risk to humans is minimal, the discovery underscores the broader threat of invasive species to Georgia’s ecosystems and public health. Continued monitoring and public cooperation remain critical to containing these resilient mollusks