Class I antigens of the bovine major histocompatibility system and resistance to the cattle tick (Boophilus microplus) assessed in three different seasons.
Two consecutive calf crops consisting of 141 three-quarters Brahman/one-quarter Shorthorn cattle were assessed for resistance to the Australian cattle tick Boophilus microplus in May, July and October 1983. Although the level of expressed resistance to artificial infestation varied considerably between seasons, the animals maintained very similar rankings for resistance in all three seasons, and the repeatability of tick resistance ranged from 0.59 to 0.82. The cattle were typed for 30 bovine class I lymphocyte antigens. Antigens W6 and CA31 were associated with susceptibility to artificial tick infestation but none of the other lymphocyte antigens showed strong associations with resistance or susceptibility.
Department of Immunology, John Curtin School of Medical Research, Australian National University, Canberra.
M J
MJ
Stear
F W
FW
Nicholas
S C
SC
Brown
R G
RG
Holroyd
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology*; D005260:Female; D015395:Histocompatibility Antigens Class I / Q000032:analysis*; D007113:Immunity, Innate; D008297:Male; D012621:Seasons; D013984:Tick Infestations / Q000276:immunology / Q000662:veterinary*; D013987:Ticks / Q000254:growth & development / Q000276:immunology
D015395:Histocompatibility Antigens Class I