title: Comparison of molecular techniques for the typing of Mycoplasma hyopneumoniae isolates.
abstract: In this study, we compared the potential of amplified fragment length polymorphism (AFLP), random amplified polymorphic DNA (RAPD) analysis, restriction fragment length polymorphism (RFLP) of the gene encoding lipoprotein P146, and the variable number of tandem repeats (VNTR) of the P97 encoding gene, as possible methods for typing an international collection of Mycoplasma hyopneumoniae isolates. All techniques showed a typeability of 100% and high intraspecific diversity. However, the discriminatory power of the different techniques varied considerably. AFLP (>0.99) and PCR-RFLP of the P146 encoding gene (>0.98) were more discriminatory than RAPD (0.95) and estimation of the VNTR of P97 (<0.92). Other, preferentially well spread, tandem repeat regions should be included in order for this latter technique to become valuable for typing purposes. RAPD was also found to be a less interesting typing technique because of its low reproducibility between different runs. Nevertheless, all molecular techniques showed overall more resemblance between strains isolated from different pigs from the same herd. On the other hand, none of the techniques was able to show a clear relationship between the country of origin and the fingerprints obtained. We conclude that AFLP and an earlier described PFGE technique are highly reliable and discriminatory typing techniques for outlining the genomic diversity of M. hyopneumoniae isolates. Our data also show that RFLP of a highly variable gene encoding P146 may be an equally useful alternative for demonstrating intraspecific variability, although the generation of sequence variability of the gene remains unclear and must be further examined.
authors.affiliation: Veterinary and Agrochemical Research Centre, Groeselenberg 99, 1180 Brussels, Belgium. tista@var.fgov.be
authors.forename: Tim
authors.initials: T
authors.lastname: Stakenborg
authors.forename: Jo
authors.initials: J
authors.lastname: Vicca
authors.forename: Dominiek
authors.initials: D
authors.lastname: Maes
authors.forename: Johan
authors.initials: J
authors.lastname: Peeters
authors.forename: Aart
authors.initials: A
authors.lastname: de Kruif
authors.forename: Freddy
authors.initials: F
authors.lastname: Haesebrouck
authors.forename: Patrick
authors.initials: P
authors.lastname: Butaye
mesh_terms: D018829:Adhesins, Bacterial / Q000737:chemistry / Q000235:genetics; D000818:Animals; D001483:Base Sequence; D016000:Cluster Analysis; D016172:DNA Fingerprinting / Q000379:methods / Q000662:veterinary*; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D018598:Minisatellite Repeats; D045705:Mycoplasma hyopneumoniae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D045729:Pneumonia of Swine, Mycoplasmal / Q000382:microbiology*; D012150:Polymorphism, Restriction Fragment Length; D019105:Random Amplified Polymorphic DNA Technique / Q000662:veterinary; D015203:Reproducibility of Results; D017422:Sequence Analysis, DNA; D013552:Swine
chemical_list: D018829:Adhesins, Bacterial; D004269:DNA, Bacterial; C092236:P97 protein, Mycoplasma