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      Seroprevalence and risk factors of Neospora caninum infection among domestic sheep in Henan province, central China Translated title: Séroprévalence et facteurs de risque d’infection de Neospora caninum chez les moutons domestiques dans la province du Henan, Chine centrale

      1 , 2 , 3 , 1 , 1 , 1 , *


      EDP Sciences

      Neospora caninum, seroprevalence, sheep, ELISA, central China

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          This study aimed to determine the frequency of antibodies to Neospora caninum in domestic sheep raised in Henan province, central China. Serum samples from 779 domestic sheep were collected from March 2015 to May 2016, and antibodies to N. caninum were evaluated using an enzyme-linked immunosorbent assay (ELISA). The results showed an overall IgG positive rate of 7.32% (57/779). The risk factors significantly related to seropositivity to N. caninum in sheep were the age, the presence of dogs, and the rearing system. This is the first report of N. caninum infection and associated risk factors in domestic sheep in central China.

          Translated abstract

          Cette étude visait à déterminer la fréquence des anticorps contre Neospora caninum chez les moutons domestiques élevés dans la province du Henan, en Chine centrale. Des échantillons de sérum provenant de 779 moutons domestiques ont été prélevés entre mars 2015 et mai 2016, et les anticorps dirigés contre N. caninum ont été évalués à l’aide du test ELISA. Les résultats ont montré un taux global d’IgG positif de 7,32% (57/779). Les facteurs de risque significativement liés à la séropositivité à N. caninum chez les moutons étaient l’âge, la présence de chiens et le système d’élevage. Ceci est le premier rapport sur l’infection par N. caninum et les facteurs de risque associés chez les moutons domestiques en Chine centrale.

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          Most cited references 27

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          Prevalence of Neospora caninum and Toxoplasma gondii in sheep and dogs from Guarapuava farms, Paraná State, Brazil.

          Sheep and dog blood samples were collected from nine farms in the county of Guarapuava, Paraná, Brazil. The indirect fluorescent antibody test (IFAT) was used to detect Neospora caninum and Toxoplasma gondii antibodies. Herein, serum samples from 305 sheep were evaluated, being 29 (9.5%) and 157 (51.5%) seropositives to N. caninum and T. gondii, respectively. Seven (29.1%) and five (20.8%) out of 24 dogs were seropositives to N. caninum and T. gondii, respectively. There were no differences among the sheep serology for N. caninum and reproductive problems, management and animal feeding variables, neurological problems and presence of other animals species on the farm (P>or=0.05). The simultaneous frequency of antibodies between N. caninum and T. gondii was 5.2% in the herds. Age, breed, farm size, semi-intensive activity, mineral salt supplementation, water origin, stage of the pregnancy when reproduction problems occurred, neurological problems in lambs, presence of rodents in the food room and pasture cat access were identified as associated factors for the occurrence of toxoplasmosis in sheep (P or=0.05). The present work is the first report on serum prevalence of N. caninum in sheep from the state of Paraná, Brazil.
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            Seroprevalence of Toxoplasma gondii and Neospora caninum in wild and domestic ruminants sharing pastures in Galicia (Northwest Spain).

            The prevalence of antibodies to the protozoan parasites Toxoplasma gondii and Neospora caninum were investigated by the direct agglutination test (DAT) and cELISA, respectively, in 160 roe deer (Capreolus capreolus), 177 sheep and 178 cattle sharing pastures in Galicia (Northwest Spain). The seroprevalence for T. gondii was 13.7% in roe deer, 57% in sheep and 7.3% in cattle. The seroprevalence for N. canimum was 6.8%, 10.1% and 24.1% in roe deer, sheep and cattle, respectively. Statistically significant differences were observed between sheep and the other species for T. gondii and between cattle and the other ruminants for N. caninum. Only 19/515 animals were positive for both, T. gondii and N. caninum. Statistically significant differences were observed among different geographical areas for T. gondii but not for Neospora, seroprevalence being higher in the coastal area lower than in other areas. This study reveals a widespread exposure to T. gondii in Galician ruminants, and therefore, those species, particularly sheep, should be regarded as a potential source of infection for humans. Copyright 2009 Elsevier Ltd. All rights reserved.
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              Toxoplasma gondii and Neospora caninum seroprevalence in dairy sheep and goats mixed stock farming.

              Toxoplasma and Neospora infections are important causes of abortions and economic losses in animal production. Mixed stock farming of sheep and goats is a common practice in Mediterranean countries and could serve as a suitable model for the evaluation of differences between the two animal species regarding parasitic infections. In order to investigate the seroprevalence of T. gondii and N. caninum among flocks of small ruminants in Greece and to evaluate any prevalence difference between sheep and goats kept in mixed flocks, 833 sera samples (458 sheep and 375 goats) from 50 mixed flocks in different areas of the country were examined by ELISA for the detection of specific antibodies. Specific IgG against T. gondii were detected in 53.71% and 61.3% and against N. caninum in 16.8% and 6.9% of the sheep and goats, respectively. Goats had higher Toxoplasma seroprevalence than sheep (p<0.05), while sheep had higher Neospora seroprevalence than goats (p<0.05). The present study is the first report world wide, on the seroprevalence of T. gondii and N. caninum in sheep and goats that are kept together in mixed flocks. Copyright © 2013 Elsevier B.V. All rights reserved.

                Author and article information

                EDP Sciences
                20 March 2018
                : 25
                : ( publisher-idID: parasite/2018/01 )
                [1 ] School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003 PR China
                [2 ] Henan Muxiang Veterinary Pharmaceutical Co., Ltd, Zhengzhou, Henan, 450000 PR China
                [3 ] Animal Disease Prevention and Control Center of Xinxiang City, Xinxiang, Henan, 453003 PR China
                Author notes
                [* ]Corresponding author: zhangzhenchao525@ 123456163.com
                parasite170131 10.1051/parasite/2018019
                © S. Wang et al., published by EDP Sciences, 2018

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                Page count
                Figures: 1, Tables: 1, Equations: 0, References: 29, Pages: 5
                Short Note

                neospora caninum, seroprevalence, sheep, elisa, central china


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