At these contracted visits the veterinarian is expected to provide the farmer with an overview of potential health problems in the herd, to suggest solutions to these problems, and to make recommendations regarding strategies for monitoring and reduction of expected herd-specific health risks.
In order to avoid a reduction in the number of herds in the statistical analysis because of the absence of single values in some of the predictor variables, the original dataset was completed using an imputation technique in Stata 11 software (Stata Corporation, Texas, USA).
The reduction of IPD for herd immunity in adults (<5 year) and annual incidence of IPD in children (<5 year) were the second- and third-most influential factors, respectively.
These analyses were performed on the level of vaccine coverage (+/− 10%%), the vaccine price (+/− 10%%), reduction of the indirect (herd) effects by 50%%, differences in base-line disease incidence rates (+/− 10%%), and differences in base-line case fatality rates (+/− 10%%) for both the typical influenza season and a severe influenza pandemic season.
A reduction of Salmonella in slaughter pig herds has been attained without Salmonella free breeding herds.
The lack of income from sheep farming was cited by one fifth of respondents for the purposive reduction of flock size in their herds.
The purpose of "neighborhood policies" such as pre-emptive slaughter or emergency vaccination can be viewed as achieving a reduction of the density of susceptible herds from above to below the threshold density.
Brucella abortus and C. fetus infection of herds were independently associated with absolute reduction in PrCR of 14.9% and 8.4%, respectively.
One household experienced a herd size reduction of more than 50%, losing 10 adults and all five calves born over the course the year and reported having to sell five animals.
17 An unanticipated but beneficial consequence of rotavirus vaccination has been the reduction of rotavirus disease in unvaccinated individuals (herd protection), likely due to reduced virus transmission.
