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Beta-lactam resistance in Haemophilus parasuis Is mediated by plasmid pB1000 bearing blaROB-1.
San Millan, Alvaro; Escudero, Jose Antonio; Catalan, Ana; Nieto, Silvia; Farelo, Fidel; Gibert, Magdalena; Moreno, Miguel Angel; Dominguez, Lucas; Gonzalez-Zorn, Bruno.
Antimicrob Agents Chemother ; 51(6): 2260-4, 2007 Jun.
Article in English | MEDLINE | ID: mdl-17438055

ABSTRACT

beta-Lactam resistance in Haemophilus parasuis is an emerging phenomenon that has not yet been characterized from a molecular perspective. Clinical high-level beta-lactam-resistant isolates from Spain bore a novel plasmid, pB1000, expressing a functionally active ROB-1 beta-lactamase. Pulsed-field gel electrophoresis was applied for the first time to H. parasuis and showed that beta-lactam resistance is due to clonal spread of a resistant strain, BB1018, bearing pB1000.


Subject(s)
Haemophilus parasuis/drug effects , Plasmids , beta-Lactam Resistance/genetics , beta-Lactamases/genetics , beta-Lactams/pharmacology , Animals , Electrophoresis, Gel, Pulsed-Field , Haemophilus Infections/microbiology , Haemophilus Infections/veterinary , Haemophilus parasuis/enzymology , Haemophilus parasuis/genetics , Microbial Sensitivity Tests , Molecular Sequence Data , Sequence Analysis, DNA , Swine/microbiology , Swine Diseases/microbiology , beta-Lactamases/metabolism
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