Table 1 Summary of EI control zoning, (based on NSW DPI zoning descriptions).
Infection level/risk | Zone colour | Infection level | States/Regions affected | Summary of actions during outbreak |
|---|---|---|---|---|
High | Purple | Restricted area: High initial infection | NSW: around Sydney and stretching up North West to include Hunter Valley area | Initially subject to high degrees of control and quarantining. Region of relatively high/dense horse population. Later in outbreak disease rate was so high that disease in this area was left to run its course; quarantine was lifted and movement restrictions within the zone were relaxed. |
Red | Restricted area: High risk of disease | NSW: largely around purple zone, and South East Qld. | Very high levels of movement control and restriction were maintained throughout, infected areas were quarantined, and high levels of disease monitoring were maintained. | |
Amber | Restricted area: Buffer zones | NSW, Qld. | High levels of movement control and monitoring were in place throughout outbreak. Control and containment using vaccination was initiated in these zones first. | |
Green | Protected Area: Uninfected in NSW/Qld | NSW, Qld. | High levels of movement control and vigilance were in place throughout, although there was no infection detected. | |
Low | White | Uninfected | Vic., ACT, Tas., NT, SA, WA. | Initial movement standstill, general surveillance throughout outbreak and increasing easing of movement controls within and between States over time. |