TY - JOUR
T1 - Dermacentor hunteri (Acari
T2 - Ixodidae): An experimental vector of Anaplasma marginale and A. ovis (Rickettsiales: Anaplasmataceae) to calves and sheep
AU - Stiller, David
AU - Crosbie, Paul R.
AU - Boyce, Walter M
AU - Goff, Will L.
PY - 1999/5
Y1 - 1999/5
N2 - The experimental vector competence of laboratory-reared Dermacentor hunteri Bishopp for Anaplasma marginale Theiler and Anaplasma ovis Lestoquard was evaluated by delayed transfer of male ticks from infected to susceptible Holstein calves and from infected to susceptible domestic sheep, respectively. After feeding for 4 or 5 d on rickettsemic acquisition hosts, the ticks were held off the host at 26°C, ≈93% RH, and a photoperiod of 14:10 (L:D) h for 7 or 8 d, then test fed for 5 or 7 d. Additionally, ticks test-fed for 5 d on 2 susceptible calves were removed, held off the host for 7 d, and test-fed for 5 d on a 3rd susceptible calf to test the tick's ability to transmit A. marginale by delayed serial transfer. Tick transmission of A. marginale to 3 test calves and A. ovis to 3 test sheep was demonstrated by blood smear and indirect immunofluorescence serology. These data indicate that males of D. hunteri, a tick commonly found on desert bighorn, Ovis canadensis Shaw, in the southwestern United States and northern Mexico, may be competent natural vectors of these organisms present in desert bighorn populations.
AB - The experimental vector competence of laboratory-reared Dermacentor hunteri Bishopp for Anaplasma marginale Theiler and Anaplasma ovis Lestoquard was evaluated by delayed transfer of male ticks from infected to susceptible Holstein calves and from infected to susceptible domestic sheep, respectively. After feeding for 4 or 5 d on rickettsemic acquisition hosts, the ticks were held off the host at 26°C, ≈93% RH, and a photoperiod of 14:10 (L:D) h for 7 or 8 d, then test fed for 5 or 7 d. Additionally, ticks test-fed for 5 d on 2 susceptible calves were removed, held off the host for 7 d, and test-fed for 5 d on a 3rd susceptible calf to test the tick's ability to transmit A. marginale by delayed serial transfer. Tick transmission of A. marginale to 3 test calves and A. ovis to 3 test sheep was demonstrated by blood smear and indirect immunofluorescence serology. These data indicate that males of D. hunteri, a tick commonly found on desert bighorn, Ovis canadensis Shaw, in the southwestern United States and northern Mexico, may be competent natural vectors of these organisms present in desert bighorn populations.
KW - Anaphisma ovis
KW - Anaplasma marginale
KW - Dermacentor hunteri
KW - Experimental vector competence
KW - Intrastadial transmission
UR - http://www.scopus.com/inward/record.url?scp=0033125737&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033125737&partnerID=8YFLogxK
M3 - Article
C2 - 10337102
AN - SCOPUS:0033125737
VL - 36
SP - 321
EP - 324
JO - Journal of Medical Entomology
JF - Journal of Medical Entomology
SN - 0022-2585
IS - 3
ER -