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[Cu,Zn]-Superoxide Dismutase Mutants of the Swine Pathogen Actinobacillus pleuropneumoniae Are Unattenuated in Infections of the Natural Host

机译:猪病原性胸膜肺炎放线杆菌的[Cu,Zn]-超氧化物歧化酶突变体在自然宿主的感染中未减毒。

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Actinobacillus pleuropneumoniae, the causative agent of porcine pleuropneumonia, contains a periplasmic Cu- and Zn-cofactored superoxide dismutase ([Cu,Zn]-SOD, or SodC) which has the potential, realized in other pathogens, to promote bacterial survival during infection by dismutating host-defense-derived superoxide. Here we describe the construction of a site-specific, [Cu,Zn]-SOD-deficientA. pleuropneumoniae serotype 1 mutant and show that although the mutant is highly sensitive to the microbicidal action of superoxide in vitro, it remains fully virulent in experimental pulmonary infection in pigs.
机译:猪胸膜肺炎的致病菌胸膜肺炎放线杆菌包含一种铜质和锌质超氧化物歧化酶([Cu,Zn] -SOD或SodC),在其他病原体中都有潜力通过使源自宿主防御的超氧化物歧化来提高细菌在感染过程中的存活率。在这里,我们描述了特定于位点的[Cu,Zn] -SOD缺陷em的构建。肺炎支原体血清型1突变体,并表明尽管该突变体对体外超氧化物的杀微生物作用高度敏感,但在猪的实验性肺部感染中仍然具有完全的毒性。

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