title: Identification of salivary antigenic markers discriminating host exposition between two European ticks: Rhipicephalus sanguineus and Dermacentor reticulatus.
abstract: To succeed blood meal, ticks inject salivary proteins to mammalian hosts, eliciting an antibody response against these foreign antigens. Although this immune response has been proposed as a surrogate marker of exposure to tick bites, identification of the corresponding antigens remains elusive. For this aim, a comparison by immunoblots of the kinetic IgG responses to protein salivary gland extracts from two European tick species, Rhipicephalus sanguineus or Dermacentor reticulatus, in rabbits was performed. A singularity in the immune patterns was observed according to rabbit exposure status and depending on the antigen source. Six and five bands were found specifically associated to R. sanguineus and to D. reticulatus exposures, respectively. The identity of these salivary antigenic proteins was determined using an original immunoproteomic approach. The utilization of these tick salivary proteins as biomarker candidates to discriminate R. sanguineus and/or D. reticulatus tick exposure or to develop anti-tick vaccines is discussed.
authors.affiliation: Unité des Rickettsies, WHO Collaborative Center for Rickettsial and Other Arthropod-Borne Bacterial Diseases, Unité de Recherche des Maladies Infectieuses et Tropicales Emergente, UMR CNRS IRD, IFR, Institut Hospitalier Universitaire Marseille, Faculté de Médecine, Marseille, France. vinhvuhai@gmail.com
authors.forename: Vinh
authors.initials: V
authors.lastname: Vu Hai
authors.forename: Lionel
authors.initials: L
authors.lastname: Almeras
authors.forename: Stephane
authors.initials: S
authors.lastname: Audebert
authors.forename: Matthieu
authors.initials: M
authors.lastname: Pophillat
authors.forename: Nathalie
authors.initials: N
authors.lastname: Boulanger
authors.forename: Philippe
authors.initials: P
authors.lastname: Parola
authors.forename: Didier
authors.initials: D
authors.lastname: Raoult
authors.forename: Frederic
authors.initials: F
authors.lastname: Pages
mesh_terms: D000818:Animals; D000941:Antigens / Q000276:immunology; D001733:Bites and Stings; D003870:Dermacentor / Q000276:immunology*; D005260:Female; D007074:Immunoglobulin G / Q000097:blood / Q000276:immunology; D007700:Kinetics; D011817:Rabbits; D048508:Rhipicephalus sanguineus / Q000276:immunology*; D012471:Salivary Proteins and Peptides / Q000276:immunology* / Q000378:metabolism
chemical_list: D000941:Antigens; D007074:Immunoglobulin G; D012471:Salivary Proteins and Peptides