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the claim
Chlamydia infects wild koala populations in Australia and can cause blindness and infertility.
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SUPPORTED
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Recorded sources
7 sources for · 2 against
Is it true that Chlamydia infects wild koala populations in Australia and can cause blindness and infertility?
Yes. Multiple peer-reviewed studies confirm that Chlamydia pecorum infects wild koalas in Australia and causes disease; one study explicitly states the pathogen causes blindness and infertility in koalas.
Verdict: SUPPORTED · 7 sources for, 2 against · Last checked
Evidence for · 7
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HQ, D., JSF, W., M, D., S, P., N, P., P, T., & M, J. (2026). Current status and future directions of <i>Chlamydia pecorum</i> research: a scoping review (2010-2025).. doi.org. https://doi.org/10.3389/fvets.2026.1799591
Evidence against · 2
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Chlamydia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Chlamydia
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More for · 6
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DS, S., M, J., P, S., NM, P., JSF, W., C, K., C, O., J, H., A, G., L, V., T, P., J, W., P, T., & S, P. (2025). Dominance of Vaccine-Specific <i>Chlamydia pecorum ompA</i> Genotypes in Koalas From North-Eastern Australia.. doi.org. https://doi.org/10.1002/ece3.70973
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M, J. (2019). <i>Chlamydiae</i> from Down Under: The Curious Cases of Chlamydial Infections in Australia.. doi.org. https://doi.org/10.3390/microorganisms7120602
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Waugh, C., Khan, S. A., Carver, S., Hanger, J., Loader, J., & Polkinghorne, A. (2016). A Prototype Recombinant-Protein Based Chlamydia pecorum Vaccine Results in Reduced Chlamydial Burden and Less Clinical Disease in Free-Ranging Koalas ( Phascolarctos cinereus ). doi.org. https://doi.org/10.1371/journal.pone.0146934
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Ojiako, C., Timms, P., Grosmaire, J., Wong, J. S. F., Jelocnik, M., Pollak, N. M., Hanger, J., Villiers, D. D. d., Smit, S., & Phillips, S. (2026). Infection dynamics and disease prevalence of Chlamydia pecorum in koalas across two geographically separated habitats in Southeast Queensland.. doi.org. https://doi.org/10.1016/j.vetmic.2026.111152
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Nyari, S., Waugh, C. A., Dong, J., Quigley, B. L., Hanger, J., & Loader, J. (2017). Epidemiology of chlamydial infection and disease in a free-ranging koala ( Phascolarctos cinereus ) population. doi.org. https://doi.org/10.1371/journal.pone.0190114
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Koala retrovirus load and non-A subtypes are associated with secondary disease among wild northern koalas. (n.d.). cir.nii.ac.jp. https://doi.org/10.1371/journal.ppat.1010513
More against · 1
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Chlamydia trachomatis. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Chlamydia_trachomatis
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