1. Development of a multiplex PCR assay for the detection of key genes associated with Pasteurella multocida subspecies.
- Author
-
Ujvári B, Gantelet H, and Magyar T
- Subjects
- Animals, Genotype, Multiplex Polymerase Chain Reaction veterinary, RNA, Ribosomal, 16S genetics, Pasteurella Infections diagnosis, Pasteurella Infections veterinary, Pasteurella multocida genetics
- Abstract
The ability to distinguish among the subspecies of Pasteurella multocida isolates is important epidemiologically; however, classification at the subspecies level based on the results of conventional biochemical tests (fermentation of sorbitol and dulcitol) is reportedly not accurate in all cases. Therefore, we developed a rapid, multiplex PCR assay to differentiate among the 3 subspecies of P. multocida . The PCR assay includes the P. multocida species-specific primers KMT1SP6 and KMT1T7 as an internal amplification control, with a newly designed gatD (galactitol-1-phosphate-5-dehydrogenase)-specific primer pair (unique for subsp. gallicida ), and primers targeting a 16S rRNA gene region specific for subsp. septica . The subspecies specificity of the PCR was demonstrated by applying the test to a collection of 70 P. multocida isolates, including the Heddleston serovar reference strains; all isolates and strains were assigned correctly. The PCR assay is a sensitive, specific, and highly effective method for the identification of P. multocida subspecies, and an alternative to biochemical test-based differentiation. A possible relationship was noticed between P. multocida subspecies and lipopolysaccharide (LPS) genotype; all but one of the subsp. gallicida strains were isolated only from avian hosts and represented L1 LPS genotype. Subsp. multocida and subsp. septica isolates were classified into 5 and 4 different LPS genotypes, respectively, of which L3 was the only LPS genotype shared between these 2 subspecies. more...
- Published
- 2022
- Full Text
- View/download PDF