Maximum incubation period
1
Minimum incubation period
Day of investigation
2
Tracing window for source
Onset of clinical signs
Time
3
Tracing window for spread
Control measures start
4
Figure 8 . Tracing window for an infectious disease source and spread
5
Surveillance
Following review of our outbreak data on a farm or in the wild , surveillance of other local farms , catchments , marine areas or the rest of the state may be appropriate . Further resources on surveillance are provided towards the end of the guide .
6
7
Surveillance is a systematic series of investigations of a given population of aquatic animals to detect the occurrence of disease which may involve testing samples of a population .
8
9
10
23