Acta Parasitologica

, Volume 59, Issue 1, pp 5–10 | Cite as

Comparative study for the detection of antibodies to Neospora caninum in milk and sera in dairy cattle in southern Romania

  • Violeta Enachescu
  • Mariana Ionita
  • Ioan Liviu Mitrea
Original Paper


The study aimed to assess the within-herd Neospora caninum exposure in dairy cattle in southern Romania, based on the detection of specific antibodies in milk and serum. A total of 104 paired samples of milk and serum were collected from four dairy farms. Individual samples were analyzed for N. caninum antibodies by ELISA: IDEXX Neospora Ab (Idx) (three farms: A, B, C; n = 60) and ID-VET Lab (Idv) (farm D; n = 44). Additionally, four pooled milk samples, one per each farm (A, B, C) and a composed one (A+B+C), were analyzed with Idx ELISA. Optimized cut-off values for milk samples were determined by receiver operating characteristic (ROC) analysis, with serum results considered as true status. The agreement was expressed by K values. The overall seroprevalence of N. caninum infection was 45% in the farms tested by Idx ELISA and 56.8% in the farm tested by Idv ELISA. A good agreement between serum and milk was obtained for both ELISA kits (K = 0.72 and 0.77, respectively). The specificity and sensitivity at optimized cut-off of S/P>0.704 for Idx and S/P%>7.966% for Idv were 100% and 70.37% for Idx and 89.47% and 88% for Idv. Testing pooled milk samples, there were identified as N. caninum positive the dairy farms with a 15% or higher within-herd seroprevalence at the cut-off value of S/P>0.51. This is the first study in Romania in which milk samples were tested to determine the N. caninum infection status in dairy farms, providing a base for further researches.


Cattle Neospora caninum IgG antibodies serum milk Romania 


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Copyright information

© Versita Warsaw and Springer-Verlag Wien 2014

Authors and Affiliations

  • Violeta Enachescu
    • 1
  • Mariana Ionita
    • 1
  • Ioan Liviu Mitrea
    • 1
  1. 1.Department of Parasitology and Parasitic Diseases, Faculty of Veterinary Medicine of BucharestUniversity of Agronomic Sciences and Veterinary MedicineBucharestRomania

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