title: Hyalomma ticks: bovine resistance under field conditions as related to host age and breed.
abstract: Field collection of ticks from two breeds of cattle [Native breed (local) and purebred [Friesian)], showed that the number of ticks was higher on purebred than on native cattle. The susceptibility seemed to increase with the age of the animals. Furthermore, breed appeared to exert more influence than age. There was no correlation between the number of ticks associated with each animal, the antibody production and antigens recognized. The immune response under field condition looked more like immune suppression than immune protection.
authors.affiliation: Département de Parasitologie et Maladies Parasitaires, Institut Agronomique et Vétérinaire Hassan II, Rabat, Maroc.
authors.forename: H
authors.initials: H
authors.lastname: Sahibi
authors.forename: A
authors.initials: A
authors.lastname: Rhalem
authors.forename: N
authors.initials: N
authors.lastname: Tikki
authors.forename: F
authors.initials: F
authors.lastname: Ben Kouka
authors.forename: O
authors.initials: O
authors.lastname: Barriga
mesh_terms: D000375:Aging / Q000502:physiology; D000818:Animals; D000917:Antibody Formation; D001947:Breeding; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology / Q000469:parasitology* / Q000503:physiopathology; D006790:Host-Parasite Interactions; D007113:Immunity, Innate; D013984:Tick Infestations / Q000276:immunology / Q000503:physiopathology / Q000662:veterinary*; D013997:Time Factors