Degeneration in female Dermacentor variabilis
appears to be due to programmed cell death.
Spotted-fever group Rickettsia in Dermacentor variabilis
Quantitative PCR results for rickettsia in Amblyomma maculatum and Dermacentor variabilis
ticks, Kentucky and Tennessee, USA, 2012 Location, tick species No.
Immediate and persistent tick killing activity for 12 weeks (Ixodes scapularis - black-legged tick, Dermacentor variabilis
- American dog tick, and Rhipicephalus sanguineus - brown dog tick)
Repellant Properties of Stone-Mint, Cunila origanoides, against the American Dog Tick, Dermacentor variabilis
In this study, the repellency of native Tennessee herb Cunila origanoides against Dermacentor variabilis
was studied using a laboratory bioassay.
Our study demonstrates, for the first time, attraction to a mixture of chlorophenols by the American dog tick, Dermacentor variabilis
(Say), the principle vector of the agents of Rocky Mountain spotted fever and tularemia.
scapularis, Amblyomma americanum, Dermacentor variabilis
, and Rhipicephalus sanguineus) succumbed to nootkatone.
2,4,6-trichlorophenol (2,4,6-TCP) was detected in adults and nymphs, but not larvae or eggs of the American dog tick, Dermacentor variabilis
Vectors include Dermacentor variabilis
, Amblyomma americanum and Ixodes scapularis, all Ixodid tick species found in Missouri, while the causative agents are small, obligate, intraleucocytic bacteria of genus Ehrlichia.
scapularis (304 nymphs, 2 adults), 50 Dermacentor variabilis
(all adults), and 1 I.
In this study, the repellency of Pycnanthemum pycnanthemoides, a member of Lamiaceae, was studied against Dermacentor variabilis
using an in vitro assay.