title: Use of Mycobacterium avium subsp. paratuberculosis specific coding sequences for serodiagnosis of bovine paratuberculosis.
abstract: In this study, the finished complete genome of Mycobacterium avium subsp. paratuberculosis (Map) was screened for specific coding sequences that could be very valuable in the design of a sensitive and specific Map detection serological assay. Eighty-seven Map-specific sequences were retained. Among these, three candidate antigens have been analysed for their serodiagnostic potential. These antigens were selected on the basis of their putative immunogenicity as predicted by in silico analysis. The antigens were cloned in Escherichia coli, expressed, and purified before testing in an antibody detection ELISA test, using a well characterized panel of 18 and 48 sera from Map infected and uninfected cattle, respectively. Two of these antigens, antigen 6 and MAP1637c, yielded in our conditions a sensitivity of 72% and 82%, respectively, for a specificity of 98%. It is particularly noticeable that, when probed with the same serum panel, the most widely used European paratuberculosis commercial seroassay (Pourquier test) yielded a sensitivity of 72% for a specificity of only 92%.
authors.affiliation: Department of Proteomic and Protein Biochemistry, University of Mons-Hainaut, Av. du Champs de Mars, 6, B-7000 Mons, Belgium.
authors.forename: B
authors.initials: B
authors.lastname: Leroy
authors.forename: S
authors.initials: S
authors.lastname: Viart
authors.forename: N
authors.initials: N
authors.lastname: Trinchero
authors.forename: V
authors.initials: V
authors.lastname: Roupie
authors.forename: M
authors.initials: M
authors.lastname: Govaerts
authors.forename: J J
authors.initials: JJ
authors.lastname: Letesson
authors.forename: K
authors.initials: K
authors.lastname: Huygen
authors.forename: R
authors.initials: R
authors.lastname: Wattiez
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000235:genetics; D001426:Bacterial Proteins / Q000235:genetics; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis / Q000382:microbiology*; D003001:Cloning, Molecular; D004797:Enzyme-Linked Immunosorbent Assay; D004926:Escherichia coli / Q000235:genetics; D016680:Genome, Bacterial; D013058:Mass Spectrometry; D016927:Mycobacterium avium subsp. paratuberculosis / Q000235:genetics* / Q000302:isolation & purification; D010283:Paratuberculosis / Q000175:diagnosis*; D016133:Polymerase Chain Reaction; D012680:Sensitivity and Specificity; D012698:Serologic Tests / Q000379:methods
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins