Association of Neospora caninum with reproductive performance in dairy cows: A prospective study from Iran
محل انتشار: گفتمان پژوهش دامپزشکی، دوره: 8، شماره: 2
سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 59
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شناسه ملی سند علمی:
JR_VRFAN-8-2_004
تاریخ نمایه سازی: 25 آبان 1402
چکیده مقاله:
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 ۲۰۱۱ to ۲۰۱۳ in southern Iran to evaluate the impact of neosporosis on reproductive performance. A total of ۲۵۳ 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 ۳۰.۴۰% (۹۵% CI: ۲۷.۴۰, ۳۶.۱۰). The overall abortion rate was ۱۲.۲۵%, significantly higher in seropositive animals (۲۰.۸۰%) than seronegative ones (۸.۵۰%). Results of Cox model showed that serostatus of animal for N. caninum and season had significant associations with abortion (p < ۰.۰۱). Neospora caninum did not show significant association with other factors such as dystocia and sex of calves. In conclusion, neosporosis is responsible for ۱۲.۰۰% excess abortion risk in infected group and more than ۳۰.۰۰% 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.
کلیدواژه ها:
نویسندگان
Maryam Ansari-Lari
Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Abbas Rowshan-Ghasrodashti
Department of Internal Medicine, School of Veterinary Medicine, Islamic Azad University, Kazeroon Branch, Kazeroon, Iran
Hadi Jesmani
Department of Clinical Studies, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Maliheh Masoudian
Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Mehrdad Badkoobeh
Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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