Tick bites may result in allergic reactions to the ticks themselves, including anaphylaxis, and, rarely, there have been fatalities.
Allergy to proteins in the tick’s saliva is the cause of these reactions.
Tick anaphylaxis is very rare in countries other than Australia, but is not uncommon in tick hyper-endemic areas here.
Crucially, people who suffer an anaphylactic reaction to a tick only do so when the tick is disturbed.
Swellings at the site of a tick bite can occur before either mammalian meat allergy or tick anaphylaxis appears.