Frog Welfare and Chytrid Fungus | Animal Welfare Hub

Chytridiomycosis — caused by the chytrid fungus Batrachochytrium dendrobatidis — has caused the extinction of over 90 frog species and is causing ongoing welfare harm to populations worldwide.

Key Facts

Chytrid fungus has driven at least 90 frog species to extinction since its global spread in the 1970s-80s
The fungus infects the skin of frogs, disrupting electrolyte transport and causing cardiac arrest
Australia lost several gastric-brooding frog species to chytrid before recovery was possible
Panama has been particularly severely affected — entire highland frog communities were eliminated
Probiotic skin treatments and assisted gene flow are being trialled as mitigation strategies

Welfare Considerations

Frogs infected with chytrid fungus die from electrolyte imbalance-induced cardiac arrest over days to weeks — the process causes lethargy, abnormal posture and then death. The scale of chytrid-driven mortality is staggering — billions of individual frogs killed globally. Captive assurance colonies protect species from extinction but cannot address individual welfare harm in wild populations. The welfare case for developing probiotic and genetic resistance tools is compelling given the scale of suffering.

What You Can Do

Support Amphibian Survival Alliance conservation programmes
Never release captive amphibians or aquarium water into wild waterways
Clean and dry footwear when moving between wetland sites to prevent chytrid spread
Donate to amphibian rescue and assurance colony programmes for threatened frog species