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Entry title:
Ticks (Ixodes ricinus)
Last updated on Thursday, 10 April 2025 at 04:00pm
Globally, ticks are one of the most significant disease vectors. A vector is a living organism, such as ticks or mosquitoes, that can transmit infections between animal or human hosts.
Ticks can pick up pathogens while feeding on an infected animal host and subsequently transmit them to hosts they may feed on. In the UK, the most important tick species to human health is Ixodes ricinus (sheep or deer tick). This species can be found feeding on humans and is a vector of Lyme disease and other tick-borne infections.
The Tick Surveillance Scheme (TSS) was set up in 2005 to map and monitor tick distribution across the UK. Data collected from the TSS informs UKHSA’s assessments of the public health impact of ticks.
Tick samples sent to UKHSA provide valuable information on the distribution of tick species present across the UK, their seasonal activity and their host associations. This information helps to highlight which tick species are important to human and animal health.
These metrics are updated quarterly. The next update will be in May 2025.
The total annual records of Ixodes ricinus ticks submitted to the Tick Surveillance Scheme per year. Data is shown by the year the tick was collected and shown as at December of each year. For example, the figures for 2022 are shown as at “Dec 2022”.
Records received annually data for the total annual records of Ixodes ricinus ticks submitted to the Tick Surveillance Scheme per year. Data is shown by the year the tick was collected and shown as at December of each year. For example, the figures for 2022 are shown as at “Dec 2022”.
The total monthly records of Ixodes ricinus ticks submitted to the Tick Surveillance Scheme for the current period in comparison to the mean monthly average from the previous 10 years. Data is shown by the month the tick was collected.
Monthly records versus mean trend data for the total monthly records of Ixodes ricinus ticks submitted to the Tick Surveillance Scheme for the current period in comparison to the mean monthly average from the previous 10 years. Data is shown by the month the tick was collected.
This collection contains information about ticks and what UKHSA’s Medical Entomology and Zoonoses Ecology team does to monitor ticks and pathogens associated with tick-borne illnesses in the UK.