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Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran

There is no prospective study from Iran to estimate the direct risk of Neospora caninum for pregnancy loss or reproductive factors. In addition, there is no report in the literature concerning the association of N. caninum with dystocia and sex of calves. Therefore, this study was conducted on a gro...

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Autores principales: Ansari-Lari, Maryam, Rowshan-Ghasrodashti, Abbas, Jesmani, Hadi, Masoudian, Maliheh, Badkoobeh, Mehrdad
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Urmia University Press 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5524547/
https://www.ncbi.nlm.nih.gov/pubmed/28785385
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author Ansari-Lari, Maryam
Rowshan-Ghasrodashti, Abbas
Jesmani, Hadi
Masoudian, Maliheh
Badkoobeh, Mehrdad
author_facet Ansari-Lari, Maryam
Rowshan-Ghasrodashti, Abbas
Jesmani, Hadi
Masoudian, Maliheh
Badkoobeh, Mehrdad
author_sort Ansari-Lari, Maryam
collection PubMed
description There is no prospective study from Iran to estimate the direct risk of Neospora caninum for pregnancy loss or reproductive factors. In addition, there is no report in the literature concerning the association of N. caninum with dystocia and sex of calves. Therefore, this study was conducted on a group of dairy cows in a large intensive production system during 2011 to 2013 in southern Iran to evaluate the impact of neosporosis on reproductive performance. A total of 253 cows which were diagnosed as pregnant during the first six months of the study were followed until calving or abortion. Reproductive data were collected and N. caninum serostatus was determined using ELISA. To investigate the association of abortion with N. caninum, survival analysis was performed using Cox proportional hazard model. The N. caninum seroprevalence in the study group was 30.40% (95% CI: 27.40, 36.10). The overall abortion rate was 12.25%, significantly higher in seropositive animals (20.80%) than seronegative ones (8.50%). Results of Cox model showed that serostatus of animal for N. caninum and season had significant associations with abortion (p < 0.01). Neospora caninum did not show significant association with other factors such as dystocia and sex of calves. In conclusion, neosporosis is responsible for 12.00% excess abortion risk in infected group and more than 30.00% of abortions could be preventable by control of Neospora in study population. Therefore, control of N. caninum would reduce the economic losses caused by parasite mainly due to pregnancy loss.
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spelling pubmed-55245472017-08-07 Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran Ansari-Lari, Maryam Rowshan-Ghasrodashti, Abbas Jesmani, Hadi Masoudian, Maliheh Badkoobeh, Mehrdad Vet Res Forum Original Article There is no prospective study from Iran to estimate the direct risk of Neospora caninum for pregnancy loss or reproductive factors. In addition, there is no report in the literature concerning the association of N. caninum with dystocia and sex of calves. Therefore, this study was conducted on a group of dairy cows in a large intensive production system during 2011 to 2013 in southern Iran to evaluate the impact of neosporosis on reproductive performance. A total of 253 cows which were diagnosed as pregnant during the first six months of the study were followed until calving or abortion. Reproductive data were collected and N. caninum serostatus was determined using ELISA. To investigate the association of abortion with N. caninum, survival analysis was performed using Cox proportional hazard model. The N. caninum seroprevalence in the study group was 30.40% (95% CI: 27.40, 36.10). The overall abortion rate was 12.25%, significantly higher in seropositive animals (20.80%) than seronegative ones (8.50%). Results of Cox model showed that serostatus of animal for N. caninum and season had significant associations with abortion (p < 0.01). Neospora caninum did not show significant association with other factors such as dystocia and sex of calves. In conclusion, neosporosis is responsible for 12.00% excess abortion risk in infected group and more than 30.00% of abortions could be preventable by control of Neospora in study population. Therefore, control of N. caninum would reduce the economic losses caused by parasite mainly due to pregnancy loss. Urmia University Press 2017 2017-06-15 /pmc/articles/PMC5524547/ /pubmed/28785385 Text en © 2017 Urmia University. All rights reserved. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Ansari-Lari, Maryam
Rowshan-Ghasrodashti, Abbas
Jesmani, Hadi
Masoudian, Maliheh
Badkoobeh, Mehrdad
Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran
title Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran
title_full Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran
title_fullStr Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran
title_full_unstemmed Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran
title_short Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran
title_sort association of neospora caninum with reproductive performance in dairy cows: a prospective study from iran
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5524547/
https://www.ncbi.nlm.nih.gov/pubmed/28785385
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