We report the development of 14 new microsatellite markers in the Queensland koala (). Ten unrelated Queensland koala individuals from the San Diego Zoo, USA, were genotyped. The number of alleles per locus ranged from 2 to 7, with an average of 5.14 alleles per locus. Across all loci, the average observed and expected heterozygosity values were both 0.69. These polymorphic microsatellite loci will be useful for genetic studies relevant to the conservation of the koala, a species listed as vulnerable.
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http://dx.doi.org/10.1007/s12686-013-0115-2 | DOI Listing |
Background: Koala Retrovirus-A is a gamma-retrovirus that is spreading across wild koala populations through horizontal and vertical transmission, contributing significantly to genomic diversity across and even within koala populations. Previous studies have estimated that KoRV-A initially integrated into the koala genome less than 50,000 years ago, but the precise origins and the patterns of spread after its endogenization remain unclear.
Results: In this study, we analyzed germline insertions of KoRV-A using whole-genome sequencing data from 405 wild koalas, representing nearly the species' entire geographic range.
PLoS One
December 2024
Sydney School of Veterinary Science, The University of Sydney, Sydney, New South Wales, Australia.
Chlamydiosis is the major infectious disease responsible for significant morbidity and mortality in free-living koalas. Recently, it was reported that 28.5% of koalas infected with chlamydiosis were presented with no overt clinical signs.
View Article and Find Full Text PDFEcol Appl
January 2025
School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia.
Koalas are an iconic, endangered, Australian marsupial. Disease, habitat destruction, and catastrophic mega-fires have reduced koalas to remnant patches of their former range. With increased likelihood of extreme weather events and ongoing habitat clearing across Australia, koala populations are vulnerable to further declines and isolation.
View Article and Find Full Text PDFFront Cell Infect Microbiol
November 2024
School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, QLD, Australia.
Introduction: This study employs bulk RNA sequencing, PCR, and ELISA assays to analyze the pathological factors affecting the outcomes of ocular infections in koalas. It investigates the immune responses and gene expression profiles associated with various stages of koala ocular chlamydiosis.
Methods: A cohort of 114 koalas from Queensland, Australia were assessed, with 47% displaying clinical signs of ocular disease.
Animals (Basel)
October 2024
Centre for Planetary Health and Food Security, Griffith University, Brisbane, QLD 4111, Australia.
After the loss and fragmentation of habitat, vehicle collisions are one of the main threats to the long-term survival of wild koalas. Koala road strike data were analysed for a section of the Peak Downs Highway between Nebo and Spencer's Gap, west of Mackay, Queensland, Australia. The analysis was carried out on 345 records (October 2014 to November 2023), and results suggested the spatial distribution of koala road strike followed a random pattern along this section of the highway, assuming a Poisson point pattern on a linear network.
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