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Epidemiology of Chlamydia psittaci infections in pregnant Thoroughbred mares and foals.
Anstey, S; Lizárraga, D; Nyari, S; Chalmers, G; Carrick, J; Chicken, C; Jenkins, C; Perkins, N; Timms, P; Jelocnik, M.
Afiliación
  • Anstey S; Genecology Research Centre, University of the Sunshine Coast, Sippy Downs, Qld, 4557, Australia.
  • Lizárraga D; Genecology Research Centre, University of the Sunshine Coast, Sippy Downs, Qld, 4557, Australia; The School of Natural Sciences, University of Tasmania, 7000, Australia.
  • Nyari S; Genecology Research Centre, University of the Sunshine Coast, Sippy Downs, Qld, 4557, Australia.
  • Chalmers G; The School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, Qld, 4557, Australia.
  • Carrick J; Equine Specialist Consulting, Scone, NSW, 2337, Australia.
  • Chicken C; Scone Equine Hospital, Scone, NSW, 2337, Australia.
  • Jenkins C; NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, 2568, Australia.
  • Perkins N; The University of Queensland, School of Veterinary Science, Gatton, Qld, 4343, Australia.
  • Timms P; Genecology Research Centre, University of the Sunshine Coast, Sippy Downs, Qld, 4557, Australia.
  • Jelocnik M; Genecology Research Centre, University of the Sunshine Coast, Sippy Downs, Qld, 4557, Australia. Electronic address: mjelocni@usc.edu.au.
Vet J ; 273: 105683, 2021 Jul.
Article en En | MEDLINE | ID: mdl-34148605
Late-term foal loss due to the traditional avian pathogen Chlamydia psittaci recently emerged as a threat to the Australian Thoroughbred industry. A longitudinal study of 14 stud farms was undertaken to better understand C. psittaci infection in pregnant mares and their foals by evaluating C. psittaci prevalence, equine herpesvirus-1 (EHV-1) co-infection, avian reservoirs, and potential risk factors. Mucosal swabs taken from 228 healthy pregnant mares and their foals were tested for C. psittaci and EHV-1 using species-specific qPCR assays. No foal loss was recorded due to either pathogen, and no mare tested positive to either C. psittaci or EHV-1. However, healthy newborn foals tested positive to both pathogens, at low levels, with 13.2% (n = 30/228) and 14.5% (n = 33/228) prevalence for C. psittaci and EHV-1, respectively. Co-infection occurred in 1.3% (n = 3/228) of foals. In avian environmental faecal samples collected from the same studs, C. psittaci was detected at 5.3% (n = 5/94). Multiple logistic regression modelling found that foals born in winter were more likely to be infected with C. psittaci (adjusted odds ratio = 15.83; P < 0.001; Confidence Interval 5.12-48.49). Being a maiden mare, absence of prophylactic vaginal suture, interventions in the last trimester and residing on a farm with prior history of C. psittaci abortion posed no higher risk to infection in the newborn. Analysis of all reported C. psittaci abortion cases (Hunter Valley, 2016-2019) revealed a dominant C. psittaci sequence type (denoted ST24) and a significant correlation with frost events (Spearmans' rho = 0.44; P = 0.002).
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Psitacosis / Chlamydophila psittaci / Enfermedades de los Caballos / Animales Recién Nacidos Tipo de estudio: Observational_studies / Prognostic_studies / Risk_factors_studies / Screening_studies Límite: Animals / Pregnancy País/Región como asunto: Oceania Idioma: En Revista: Vet J Asunto de la revista: MEDICINA VETERINARIA Año: 2021 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Psitacosis / Chlamydophila psittaci / Enfermedades de los Caballos / Animales Recién Nacidos Tipo de estudio: Observational_studies / Prognostic_studies / Risk_factors_studies / Screening_studies Límite: Animals / Pregnancy País/Región como asunto: Oceania Idioma: En Revista: Vet J Asunto de la revista: MEDICINA VETERINARIA Año: 2021 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido