Figure 4

Demonstration of freedom from Chlamydia pecorum infection in the KI koala population. Mean estimates for surveillance sensitivity (SSe) and probability of freedom, P(free)i from C. pecorum between 1997 and 2018. The mean P(free) (solid, dark green line) with 95% CI as lower (shorted, dashed, dark green line) and upper (long, dashed, dark green line) confidence limits and SSe (long, dashed, light blue line) with a probability of introduction, P(intro) of 7% (solid double red line) and a design prevalence (P*) of 2%, concluded in 2018 above the 95% limit (solid double yellow line).