Dr. Stafford Tick Management Handbook - Newtown, CT

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<strong>Stafford</strong>The Connecticut Agricultural Experimentation StationThe Lyme disease spirochete in northern states is maintained, in part, by the two-year life cycleof the tick. Eggs are laid by the female in May. Larvae hatch from those eggs in mid- to late Julywith August being the peak month for larval tick activity. After feeding, the larvae drop from thehost and molt to nymphs, which will appear the following year in late spring. May, June and Julyare peak months for nymphal tick activity in the northeast. Therefore, the nymphs precede larvaeseasonally and can infect a new generation of animal hosts. Larvae active later in the summer thenbecome infected when feeding on reservoir host animals. The nymphal ticks will molt to adultsafter feeding and appear in the fall of the same year. Adult I. scapularis do not hibernate and maybe active on warm winter days and the following spring. Adults of I. scapularis are more heavilyinfected with B. burgdorferi than the nymphs because the tick has had two opportunities to becomeinfected, once as a larva and once as a nymph.Two-year Life Cycle for Ixodes scapularis19Seasonal activity of Ixodes scapularis larvae, nymphs, and adults10Bulletin No. 1010
<strong>Stafford</strong>The Connecticut Agricultural Experimentation StationTop row: Nymphal I. scapularis in the hand and close-up of an I. scapularis nymph (. ngerlike projectionsof the tick mid-gut where the Lyme spirochetes are found are visible through the tick cuticle); Middlerow: nymphal I. scapularis on . nger and female and nymph I. scapularis on . nger; Bottom row: paired I.scapularis nymph dorsal and ventral views.2021222324Bulletin No. 1010 1125
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About the AuthorDr. Kirby Stafford
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Dr. Stafford Tick Management Handbook - Newtown, CT

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