title: Prevalence of different OmpH-types among Pasteurella multocida isolated from lungs of calves with respiratory problems.
abstract: Pasteurella multocida is among the most important respiratory pathogens of cattle. Outer-membrane protein (OmpH) constitutes an essential bacterial antigen and is well studied in avian bacterial strains. Studies on isolates from cattle with signs of respiratory disease caused by Pasteurella multocida serotypes A and D have not yet been covered in the literature. The objective of this study was a comparative analysis of the ompH gene sequences from 83 isolates and four Russian reference strains of P. multocida to assign them to the allelic variants of the gene (OmpH-types). In addition, the above P. multocida strains have been characterized on the basis of capsular serotypes and virulence-associated genes. The isolates were classified into the OmpH -types based on allele specific PCR and gene fragment sequencing. The isolates of capsular serotype A have been subdivided into 6 OmpH -types, of which the most common types identified were A1 and A2. All capsular serotype D isolates belong to the same OmpH-type (D1). On 16 of a total of 23 farms all isolates belong to only one OmpH-type, on 4 farms - to 2, and on 3 farms - to three OmpH-types. The tbpA and pfhA genes were found more often in the isolates of capsular group А as compared to capsular group D (p ≤ 0.05). OmpH-types of serogroup А differ significantly (p ≤ 0.05) among themselves by the prevalence of the pfhA and hgbB genes.
authors.affiliation: Siberian Federal Research Center for Agrobiotechnologies Russian Academy of Science, Krasnoobsk, Novosibirsk Region, 630501, Russian Federation. Electronic address: nav-vet@mail.ru.
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Nefedchenko
authors.affiliation: Siberian Federal Research Center for Agrobiotechnologies Russian Academy of Science, Krasnoobsk, Novosibirsk Region, 630501, Russian Federation. Electronic address: t-glotova@mail.ru.
authors.forename: Tatyana I
authors.initials: TI
authors.lastname: Glotova
authors.affiliation: Siberian Federal Research Center for Agrobiotechnologies Russian Academy of Science, Krasnoobsk, Novosibirsk Region, 630501, Russian Federation. Electronic address: glotov_vet@mail.ru.
authors.forename: Alexander G
authors.initials: AG
authors.lastname: Glotov
authors.affiliation: State Research Center of Virology and Biotechnology Vector, Koltsovo, Novosibirsk Region, 630559, Russian Federation. Electronic address: tern@vector.nsc.ru.
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Ternovoy
authors.affiliation: State Research Center of Virology and Biotechnology Vector, Koltsovo, Novosibirsk Region, 630559, Russian Federation. Electronic address: sementsova@vector.nsc.ru.
authors.forename: Alexandra O
authors.initials: AO
authors.lastname: Sementsova
mesh_terms: D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics*; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D014644:Genetic Variation; D005838:Genotype; D008168:Lung / Q000382:microbiology*; D016979:Pasteurella multocida / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D012766:Pasteurellosis, Pneumonic / Q000382:microbiology*; D016133:Polymerase Chain Reaction; D015995:Prevalence; D017422:Sequence Analysis, DNA; D065288:Serogroup; D037521:Virulence Factors / Q000032:analysis / Q000235:genetics
chemical_list: D001425:Bacterial Outer Membrane Proteins; D037521:Virulence Factors; C067128:ompH protein, bacteria
keywords: Cattle; Gene; OmpH; Pasteurella multocida; Virulence factor