Two animals tested positive after being rescued in Appin, prompting biosecurity measures to stop the disease spreading

• Get our breaking news email, free app or daily news podcast

Chlamydia has spread to Sydney’s only disease-free koala population with two koalas testing positive after they were rescued late last year.

The koalas were tested after they were found in Appin in south-western Sydney in September with injuries suggesting they had both been hit by cars.