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Toxoplasma gondii is not an important contributor to poor reproductive performance of primiparous ewes from southern Australia: a prospective cohort study.

Authors :
Clune, Thomas
Lockwood, Amy
Hancock, Serina
Thompson, Andrew N.
Bruce, Mieghan
Beetson, Sue
Campbell, Angus J.
Glanville, Elsa
Brookes, Daniel
Trengove, Colin
O'Handley, Ryan
Jacobson, Caroline
Source :
BMC Veterinary Research. 3/19/2022, Vol. 18 Issue 1, p1-10. 10p.
Publication Year :
2022

Abstract

Background: Toxoplasma gondii causes reproductive losses in sheep worldwide, including Australia. The reproductive performance of primiparous ewes is typically lower than for mature, multiparous ewes, and younger ewes are more likely to be immunologically naïve and therefore more susceptible to reproductive disease if T. gondii infection occurs during pregnancy. The aim of this study was to assess the impact of infection with T. gondii on the reproductive performance of primiparous ewes in southern Australia using a prospective cohort study. This will inform the need for targeted control strategies for T. gondii in Australian sheep. Results: Toxoplasma gondii seropositivity using indirect ELISA was detected at 16/28 farms located across southern Australia. Apparent seropositivity to T. gondii was lower in primiparous ewes (1.1, 95% confidence interval (CI) 0.6, 1.8) compared to mature, multiparous ewes (8.1, 95% CI 6.0, 10.5; P < 0.001). Toxoplasma gondii seroconversion during the gestation and lambing period was confirmed for 11/1097 (1.0, 95% CI 0.5, 1.7) of pregnant primiparous ewes that failed to raise a lamb, and 1/161 (0.6, 95% CI 0.1, 2.9) primiparous ewes with confirmed mid-pregnancy abortion. Conclusions: Low frequency of detection of T. gondii seroconversion during gestation and low frequency of seropositivity to T. gondii suggests that toxoplasmosis was not an important contributor to reproductive losses in primiparous ewes on farms located over a wide geographical area in southern Australia. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
17466148
Volume :
18
Issue :
1
Database :
Academic Search Index
Journal :
BMC Veterinary Research
Publication Type :
Academic Journal
Accession number :
155870491
Full Text :
https://doi.org/10.1186/s12917-022-03211-w