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Chlamydia Vaccine Approved to Save Koalas from Extinction
10 Sep
Summary
- Chlamydia responsible for half of koala deaths in the wild
- Vaccine reduces chlamydia infections by 65% in wild populations
- Koala populations declining due to chlamydia, habitat loss, and extinction

In a significant development, Australian regulators have approved a chlamydia vaccine for koalas, a move that could help save the iconic marsupial from the brink of extinction. According to the article, the disease is responsible for about half of all koala deaths in the wild, with infection rates within some populations reaching as high as 70%.
The vaccine, which was trialed for a decade by researchers at the University of the Sunshine Coast, has been shown to reduce the likelihood of koalas developing chlamydia during their breeding age and decrease deaths in wild populations by at least 65%. This is a major breakthrough, as the previous treatment of antibiotics had disrupted the koalas' digestive abilities and failed to protect them from future infections.
The approval of the vaccine comes at a critical time, as Australia's koala population is facing multiple threats, including expanding cities, land clearance, and the spread of chlamydia. The government considers the koala as endangered along the east coast, with an estimated population of between 95,000 and 238,000 in the eastern states of Queensland, New South Wales, and the Australian Capital Territory. Another 129,000 to 286,000 koalas are estimated to be living in Victoria and South Australia.
With the new vaccine, researchers and conservationists hope to turn the tide and protect the beloved Australian icon from the devastating effects of chlamydia, which causes blindness, bladder infections, infertility, and death. The approval of this vaccine marks a significant step forward in the efforts to safeguard the future of the koala population in Australia.