Journal
PARASITOLOGY
Volume 129, Issue -, Pages 301-309Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0031182004005700
Keywords
Neospora canimum; risk factor; bovine abortion; logistic regression; climate; dog density
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In the German state of Rhineland-Palatinate, herds were identified that were likely to have a Neospora caninum seroprevalence greater than or equal to10% by using a bulk milk ELISA. Individual herd data were obtained by a questionnaire. Univariate logistic regression showed that bulk milk positive farms had a significantly higher chance to report an increased abortion rate than negative farms (P-Wald < 0(.)1). The chance to have a bulk milk positive herd increased with the minimum number of years a farm had reported an increased abortion rate (P-wald < 0(.)1). Questionnaire data, population and dog density as well as climatic data specific for the farm localization were used to identify potential risk factors for a herd to have acquired N. caninum infections, Within an optimized multiple logistic regression model 'Number of farm dogs', 'Herd size', and factors related to the municipality the farm was localized, i.e. 'Mean temperature in July', and 'Dog density' were significant risk factors (P-Wald < 0(.)1). The present study underlines the role farm dogs have in the epidemiology of neosporosis. In addition, it suggests that the risk a herd has to acquire N. caninum infections is also associated with factors related to the farm location, i.e. factors that are largely, out of the control of farmers.
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