Surveillance definitionWorldwide

What does an established tick population mean?

An established population means surveillance evidence supports local reproduction and persistence, rather than a single tick that was transported into the area.

Reviewed by VuxLore® Knowledge Team For Everyone

Short answer

An established population means surveillance evidence supports local reproduction and persistence, rather than a single tick that was transported into the area.

At a glance

Authorities use defined evidence thresholds, which can differ between surveillance systems.

Key takeaways

• One record does not prove establishment.

• Multiple life stages strengthen the evidence.

• Definitions should accompany maps.

Presence has levels

An imported specimen, an occasional local finding and a reproducing population describe different situations. Repeated collections across time and life stages help distinguish them.

Use the authority's definition

Some programmes specify numbers, stages and time windows. A report should cite that rule rather than use established as an informal synonym for found.