Herd examination on successfully traced herds.

Category:application testing
Priority:as time allows
This scenario is set in a small geographical area, with a high population density. The susceptible population consists of 3 production types (A, B & C) with 915 units and 314 449 animals in total. No latent period. The initial sub-clinical unit is present in Production type B. Tracing, herd exams and diagnostic testing is tested in this scenario. Herd exams (multiplier = 10) and clinical tests (Se & Sp = 100%, no delay in results) are set for direct traces of B. 4.8 units successfully traced FW 1.6 units successfully traced BW But, only 4.8 units are examined – Not the 4.8+1.6 successful traces. Only 4.2 + 0.2 units tested after tracing – as above. Possible issue: Not all units identified by tracing are examined, because units are only examined once. This might be a problem in situations where a significant amount of time has passed between the successful traces and the unit in question might have been infected in the meantime.
Small_4_test6.mdb1.59 MB



Status:active» postponed

This topic was discussed on the April 26 2011 conference call. From the minutes:

"currently, subjecting a herd to an exam or diagnostic test can only happen once in an iteration, even if a unit is traced to multiple times. Are we ok with this limitation in v3.2 or alternatively we could set a minimum time between retesting and re-examination like vaccination is handled. Is this a major concern that we need to deal with for v3.2, otherwise we can wait or leave it as is. Consensus was once version 4 and 5 have been tested and released to the public, we can then go back and address the issue with improvement which would be backward compatible with version 3.2"


Priority:not yet set» as time allows