A total of 27,854 laboratory submissions tested for PRRS at the National Veterinary Institute were included in the analysis, representing a total of 879,327 serological tests performed on 404,029 individual blood samples collected from a total of 4702 Danish swine herds.
Cases were defined as all farms reported to the SND between 1st January 2002 and 31st December 2005 and were and where at least one submission tested positive for scrapie.
The 666 farms that had been reported to the SND were classified as being either scrapie-positive when at least one submission tested positive (n = 411) or scrapie negative otherwise (n = 255).
Earliest syndrome elevations were observed in absenteeism data, followed by hospital data (+1 week), pharmacy/general practitioner consultations (+2 weeks), and deaths/laboratory submissions (test requests) (+3 weeks).
The combined submissions to test the influence of different metadata on the results were as follows: MetFrag+RT+Refs, MetFrag+CFM+RT+Refs, MetFrag+CFM+RT+Refs +MoNA, Combined_MS/MS+RT+Refs and finally Combined_MS/MS+RT+Refs+MoNA.
For test and cull, testing is either conducted on live animals in the field that are removed once CWD infection is confirmed (Wolfe et al. 2004) or hunter submissions are tested and culls are carried out in the area where positive animals were harvested (Pybus 2007; Connor et al. 2007).
After release of the ACIP guidelines, the number of annual bat submissions for rabies testing doubled relative to the previous period, and the proportion of rabies-positive bats decreased (6.5% vs. 4.2%).
The increase in bat submissions for rabies testing after 1992 correlated with RRV introduction and associated statewide enhancement of rabies surveillance and awareness generated by arrival of raccoon rabies.
Forty counties were inclusive in the upper quartile for the number of submissions for testing, as well as all other independent land use variables.
This insignificant odds ratio means that although there are fewer submissions for testing in those counties with high coverage of evergreen forest as compared to other counties there is no difference in submission rate among the counties, and surveillance bias has been mitigated.
