ticks

Alpha-gal syndrome is a tick-borne condition in which a sugar molecule called alpha-gal, present in mammals but not produced by humans and transmissible in the saliva of some ticks, can trigger delayed allergic reactions about 2–6 hours after a person consumes mammalian meat, producing hive-like rashes or anaphylaxis.

Lyme disease is transmitted by ticks.

Genetic engineering of mice is being explored as a strategy to reduce transmission of Lyme disease by targeting the ticks that feed on those mice.