Article Text

Download PDFPDF
Seroprevalence of Neospora caninum and abortion in dairy cows in northern Spain
  1. R. Mainar-Jaime, DVM,PhD1,
  2. M. Thurmond, DVM, PhD1,
  3. B. Berzal-Herranz, DVM1 and
  4. S. Hietala, PhD1
  1. 1 Department of Medicine and Epidemiology, and the California Veterinary Diagnostic Laboratory System, School of Veterinary Medicine, University of California, Davis, California 95616- 8737, USA


The seroprevalence of Neospora caninum infection was estimated from a sample of 889 cattle from 43 dairy herds in three counties in the Asturias region of Spain. The true prevalence of infection was estimated to be 30-6 per cent (95 per cent confidence interval (ca) 27.6 to 33.6). Seropositivity was associated with abortion during the previous year (odds ratio (OR)=3.31, P<0.001) and was slightly higher among purchased cattle (37.6 per cent), than among cattle raised on the farm (29.1 per cent) (P=0.078). Seropositive cows were more likely than seronegative cows to have had a seropositive dam (OR=2.3, P=0.011), suggesting that congenital transmission contributed to about 56 per cent of the infections. Herds with a true seroprevalence above 10 per cent had more dogs on the farm, than herds with a lower prevalence (P=0.032). The ORs relating abortion to seropositivity in individual herds ranged from 0.7 to 19, indicating that some herds experienced few abortions caused by N caninum, while others experienced more abortions due to the organism. Overall, 38.7 per cent of the abortions were estimated to have been attributable to N caninum.

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.