What are ticks, and what diseases do they carry?
Blood-feeding arachnids — related to spiders, not insects — that attach to a host for several days, and which matter chiefly as vectors of disease rather than because of the bite itself.
How they operate. Ticks wait on vegetation with forelegs extended, a behaviour called questing, and attach to a passing animal. They insert mouthparts, secrete a cement-like substance, and feed slowly, swelling considerably over days before dropping off.
Why they are increasing. Milder winters, expanding deer populations and changes in land use have extended both the tick season and their geographic range in the UK and elsewhere.
The diseases that matter:
Lyme disease, caused by Borrelia bacteria, affecting humans and dogs. The characteristic expanding bullseye rash appears in many but not all human cases, and its absence does not exclude infection. Untreated it can affect joints, the nervous system and the heart.
Babesiosis, which destroys red blood cells in dogs and has become established in parts of the UK.
Ehrlichiosis and anaplasmosis, mainly acquired abroad.
Tick-borne encephalitis, present in parts of Europe and detected in the UK.
Louping ill, affecting sheep and occasionally others.
Why prompt removal matters. Transmission of several pathogens generally requires the tick to be attached for a period — commonly cited as 24 to 48 hours for Lyme — so removing one quickly substantially reduces risk. Daily checking is the single most effective measure, particularly around the head, ears, armpits, groin and between toes.
How to remove one correctly:
Use a tick removal tool or fine-tipped tweezers, gripping as close to the skin as possible.
Pull steadily upward or twist with a hook tool — no jerking.
Do not burn it, smother it in oil or petroleum jelly, or squeeze the body. These make the tick regurgitate, increasing infection risk.
Clean the area, and note the date.
Watch for signs in the following weeks and mention the bite to a doctor or vet.
Preventives for pets are available and effective.
General information, not medical or veterinary advice.