Chlamydia detected in Sydney’s only disease-free koala population

Chlamydia causes infertility and has severely affected koala populations. Photograph: Matthew Starling/Getty Images

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.