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Dataset
Chlamydia psittaci and Australian Thoroughbreds: a two-year study on C. psittaci infection in pregnant mares and their foals
University of the Sunshine Coast
2022
DOI:
https://doi.org/10.25907/00153
Appears in UniSC Research Data Collection
Abstract
Foal loss due to Chlamydia psittaci (C. psittaci) is considered a threat to the Thoroughbred industry in Australia. We aimed to better understand C. psittaci infection in late pregnant mares and their foals and assess potential risks involved with this infection. A two-year study involved seven stud farms from the Hunter Valley region in Australia. Mucosal swabs from 155 mares and their foals and placental samples were tested for C. psittaci and Equine herpesvirus-1 (EHV-1) using species-specific qPCR assays. A cross sectional analysis of the 2019 (n=90) and 2020 (n=65) mares and foals utilised multilevel logistic regression (MLR) to assess potential risk factors. Multilocus Sequence Typing (MLST) was used to determine genotypes of the infecting strains detected in chlamydial foal loss. The study detected C. psittaci at an estimated prevalence of 18.9% (17/90; CI 95% 12.14, 26.18) in 2019 and 10.8% (7/65; CI 95% 0.05, 0.22) in 2020 in healthy mares and foals at low loads of infection compared to high infection loads reported in chlamydial foal loss cases(P<0.05). MLR determined that foals being born in winter (Odds ratio = 5.1; CI 95% 0.21, 1.69) was a significant predictor of C. psittaci detection. There was no foal loss to C. psittaci in the study group, but chlamydial foal loss was reported in both years in the region (2019 [n=1]; 2020 [n=3]). MLST resolved a clonal endemic C. psittaci sequence type (ST) 24 strain in all foal loss cases.The main limitations of this study concerned equine selection and sampling was performed by each farms veterinary team which may have resulted in bias. Potential contamination of swabs at foal birth collection time point. Prevention strategies in Australia should focus on temporal management and new research into correlations between yearling respiratory health and C. psittaci is warranted.
Details
- Title
- Chlamydia psittaci and Australian Thoroughbreds: a two-year study on C. psittaci infection in pregnant mares and their foals
- Authors
- Susan Anstey (Data Collector) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyFarah Zahir (Data Collector) - The University of QueenslandVasilli Kasimov (Data Collector) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyJoan Carrick (Data Collector) - Equine Specialist ConsultingCatherine Chicken (Data Collector) - Scone Equine Hospital (Australia)Cheryl Jenkins (Data Collector) - New South Wales Department of Primary IndustriesChan Nguyen (Data Collector) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyGareth R L Chalmers (Data Collector) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringNigel R Perkins (Data Collector) - The University of QueenslandPeter Timms (Data Collector) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyMartina Jelocnik (Data Collector) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - Legacy
- Format
- 2 MS Excel files; 2 MS Word files; 1 README file; 5 files, total size 73 KB
- Publisher
- University of the Sunshine Coast
- Date collected
- Jun-2019–Dec-2020
- Date published
- 2022
- DOI
- 10.25907/00153
- Copyright note
- This work is licensed under a Creative Commons Attribution 4.0 License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.
- Organisation Unit
- University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy; School of Science, Technology and Engineering; Centre for Bioinnovation
- Language
- English
- Record Identifier
- 99649378202621
- Output Type
- Dataset
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