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If , and when we have a laboratory confirmed diagnosis , the new case definition could be updated to include details about the laboratory diagnosis including the type of test conducted ( pathology , molecular test etc ). If we wish to include sub‐clinical animals that are testing positive to a disease agent , the clinical symptoms may not be a necessary part of the case definition . For example , in the circumstance where a virus ( virus X ) is a known cause of disease , we could define a case tank as having “ one confirmed positive of virus X by PCR test ”.
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Figure 5 . Healthy abalone from “ Happy Abs ”
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Figure 6 . Unhealthy abalone from “ Happy Abs ”
Photos courtesy of Agriculture Victoria
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