OBJECTIVE: To determine the seroprevalence of Neospora caninum antibodies in beef breeding herds across New South Wales (NSW) and to determine if there are any differences associated with geographic location and other herd-level factors. METHODS: Cross-sectional survey of beef breeding @entity291 (n   =   3298) from 63 properties (approximately 55 @entity291 per herd) sampled randomly from six regions in NSW using a multistage survey design. Samples were tested by ELISA for @entity16910 . Seroprevalence was determined at animal and herd levels, using an analysis approach to account for stratification, sample weighting and within-herd clustering. RESULTS: Animal-level seroprevalence ranged from 1.8% to 11.3% across regions and the overall animal seroprevalence for NSW was 5.9%. The mean within-herd seroprevalence was 5.2%. The herd seroprevalence ranged from 50% to 92%, with an overall point estimate for NSW of 63.8% (using   >=    1 animal positive   = herd positive). The within-herd seroprevalence ranged from 1.6% to 32.7% Prevalence and associated confidence limits were adjusted for the design of the survey. CONCLUSIONS: Overall, about two-thirds of all herds in NSW showed evidence of @entity281 , but the seroprevalence of @entity16910 in individual beef @entity291 in NSW was low to moderate (1.8-11.3%). Significant differences occurred between regions. The risk for herds being positive for @entity16910 was associated with geographic factors, particularly in the Mid-North Coast Region.

XXXX in beef herds in New South Wales, Australia. 1: seroprevalence study.

@entity281 :: ('MESH:D007239', 'Disease') :: ['infection'] @entity16910 :: ('29176', 'Species') :: ['N. caninum', 'N.   caninum'] @entity291 :: ('9913', 'Species') :: ['cows', 'cattle']
@entity16910 :: (29176,Species) :: ['Neospora caninum']
