An epizootic of Chlamydia psittaci equine reproductive loss associated with suspected spillover from native Australian parrots

Emerging Microbes & Infections
C JenkinsA Polkinghorne

Abstract

Chlamydia psittaci is an avian pathogen capable of spill-over infections to humans. A parrot C. psittaci strain was recently detected in an equine reproductive loss case associated with a subsequent cluster of human C. psittaci infections. In this study, we screened for C. psittaci in cases of equine reproductive loss reported in regional New South Wales, Australia during the 2016 foaling season. C. psittaci specific-PCR screening of foetal and placental tissue samples from cases of equine abortion (n = 161) and foals with compromised health status (n = 38) revealed C. psittaci positivity of 21.1% and 23.7%, respectively. There was a statistically significant geographical clustering of cases ~170 km inland from the mid-coast of NSW (P < 0.001). Genomic analysis and molecular typing of C. psittaci positive samples from this study and the previous Australian equine index case revealed that the equine strains from different studs in regional NSW were clonal, while the phylogenetic analysis revealed that the C. psittaci strains from both Australian equine disease clusters belong to the parrot-associated 6BC clade, again indicative of spill-over of C. psittaci infections from native Australian parrots. The results of this work sugge...Continue Reading

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Citations

Mar 16, 2019·Transboundary and Emerging Diseases·Martina JelocnikAdam Polkinghorne
Jul 10, 2019·Australian Veterinary Journal·M JelocnikA Polkinghorne
Aug 23, 2019·Equine Veterinary Journal·S L GoughK J Hughes
Jun 12, 2020·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·Sibylle BaumannNicole Borel
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Feb 20, 2019·Frontiers in Microbiology·Sankhya Bommana, Adam Polkinghorne
Jul 1, 2020·Transboundary and Emerging Diseases·Helena S StokesAndrew T D Bennett
Oct 29, 2020·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·Hailey SandersonJonathan Fox
Nov 19, 2020·Equine Veterinary Journal·Jessica M RoachAmanda M de Mestre
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Aug 29, 2021·Pathogens·Helena S StokesAndrew T D Bennett

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Datasets Mentioned

BETA
KE356169

Methods Mentioned

BETA
PCR
MDA

Software Mentioned

BLAST
Geneious 10 workbench
CheckM
FastQC
Maxbin
Geneious mapper
RAxML
GraphPad Prism
RAST
MLST

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