Hard ticks (Ixodidae) take one large blood meal per life stage and stay attached for days. Soft ticks (Argasidae), including Ornithodoros, feed many times for 15 to 90 minutes each, usually at night, and victims rarely recall a bite. The two families also differ in where the mouthparts sit and whether the body has a hard scutum.
Soft ticks in the genus Ornithodoros can survive years between blood meals and live for a decade or more. A single infected tick can sit…
Ixodid ticks pass through four life stages: egg, larva, nymph, and adult. Larvae, nymphs, and adult females each take one large blood…
Hard ticks find hosts by questing: climbing onto grass blades or low vegetation, anchoring with the back legs, and waving the front legs…
Within 5 to 30 minutes of biting, a hard tick begins secreting a glycine-rich saliva that hardens around its mouthparts into a cement…
An attached tick's level of engorgement is the most useful proxy for how long it has been feeding. A flat, unengorged tick is probably…
An unfed adult Ixodes scapularis female weighs about 2 milligrams. Fully engorged she weighs 200 milligrams or more - around 100 times her…