Koala Chlamydia and Wildlife Disease Management

Chlamydia is devastating koala populations across Australia, requiring urgent veterinary and conservation intervention.

Key Facts

Chlamydia affects an estimated 50-90% of koalas in some Queensland populations
The disease causes blindness, urinary tract infections, and reproductive failure
Koala chlamydia (Chlamydia pecorum) differs from the human strain
A vaccine has been developed and field trials show promising protection
Climate change, habitat loss, and dog attacks compound disease pressure on stressed animals

Welfare Considerations

Chlamydia causes prolonged suffering in koalas. Infected animals develop painful urinary tract infections, conjunctivitis leading to blindness, and reproductive tract disease that prevents breeding. Blinded koalas cannot find food or water and may descend from trees where they are vulnerable to dogs, cars, and heat stress. Treatment with antibiotics can cure individuals but disrupts gut microbiome, making antibiotic-treated koalas less able to digest toxic eucalyptus leaves. The koala chlamydia vaccine offers hope for population-level protection without welfare trade-offs.

What You Can Do

Donate to the Koala Research Centre vaccine development program
Support koala hospital and wildlife care centers in Queensland and New South Wales
Keep dogs contained in areas near koala habitat
Plant koala food trees (eucalyptus species) in appropriate regions
Advocate for koala habitat protection legislation