1 The index case is the first diagnosed case of an outbreak .
2
3
At an individual level , disease time periods are described as below in Figure 11 but can vary by agent and individual .
Shedding of agent ( this may occur prior to onset of clinical signs )
4
Infectious period
Latent period
High risk period
5
Time
6
Incubation period
7 |
Exposure to disease agent |
Onset of clinical signs |
Resolution of clinical signs / death |
8
Sub clinical Clinical
9
Figure 11 . Theoretical timeline of elements of a disease in an aquatic animal
10
30