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Evolution of Campylobacter jejuni of poultry origin in Brazil

机译：巴西家禽空肠弯曲菌的演变

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摘要

Campylobacter jejuni is the most common pathogen associated with foodborne diseases. Persistent presence of this pathogen contaminating the environment in slaughterhouses and chicken products have been reported worldwide. Although many efforts have been employed for reducing C. jejuni contamination, few studies have been conducted to understand the dynamics of C. jejuni in slaughterhouses over time. In this study, we evaluated the virulence, antibiotic resistance and genetic diversity profiles of 99 C. jejuni isolated from chilled chicken carcasses collected in Brazilian slaughterhouses during two distinct periods (2011-2012 and 2015-2016). The virulence profile was evaluated for the presence of flaA, ciaB, cadF, pldA and cdtABC genes. Antibiotic resistance was evaluated for amoxicillin-clavulanic acid, gentamicin, erythromycin and tetracycline. Genetic diversity was assessed using RAPD-PCR. The prevalence of C. jejuni was significantly reduced in 2015-2016 as well the number of antibiotic (and multidrug) resistant isolates, except for tetracycline. However, isolates from 2015 to 2016 showed higher prevalence of multiple virulence genes and genetic diversity profile compared to isolates from 2011 to 2012. During the studied period, stricter regulations to control pathogens in poultry farms and slaughterhouses were implemented in Brazil, which may have contributed to the profile variation observed due to changes of selective pressures on bacterial populations.
机译：空肠弯曲杆菌是与食源性疾病相关的最常见病原体。全世界已经报道了这种病原体在屠宰场和鸡肉产品中持久存在，污染了环境。尽管为减少空肠弯曲杆菌的污染已进行了许多努力，但很少进行研究来了解随着时间的推移，空肠弯曲杆菌在屠宰场中的动态。在这项研究中，我们评估了在两个不同时期（2011-2012年和2015-2016年）从巴西屠宰场收集的冷藏鸡尸体中分离出的99株空肠弯曲杆菌的毒力，抗生素抗性和遗传多样性。评价了flaA，ciaB，cadF，pldA和cdtABC基因的存在情况。对阿莫西林-克拉维酸，庆大霉素，红霉素和四环素的抗生素耐药性进行了评估。使用RAPD-PCR评估遗传多样性。除四环素外，空肠弯曲杆菌的患病率在2015-2016年显着降低，抗生素（和多药）耐药菌株的数量也有所减少。但是，与2011年至2012年的分离株相比，2015年至2016年的分离株显示出更高的毒力基因和遗传多样性谱。在研究期间，巴西实施了更严格的法规来控制禽场和屠宰场中的病原体，这可能有助于观察到由于细菌种群选择性压力的变化而引起的剖面变化。

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  • 来源
    《Food microbiology》 |2019年第9期|489-496|共8页
  • 作者

    Melo Roberta T.; Grazziotin Ana Laura; Valadares Junior Edson C.; Prado Renata R.; Mendonca Eliane P.; Monteiro Guilherme P.; Peres Phelipe A. B. M.; Rossi Daise A.;

  • 作者单位

    Univ Fed Uberlandia, Fac Med Vet, Lab Epidemiol Mol, Rua Ceara S-N,Bloco 2D,Sala 44, BR-38402018 Uberlandia, MG, Brazil;

    Univ Fed Uberlandia, Fac Med Vet, Lab Epidemiol Mol, Rua Ceara S-N,Bloco 2D,Sala 44, BR-38402018 Uberlandia, MG, Brazil;

    Univ Fed Uberlandia, Fac Med Vet, Lab Epidemiol Mol, Rua Ceara S-N,Bloco 2D,Sala 44, BR-38402018 Uberlandia, MG, Brazil;

    Univ Fed Uberlandia, Fac Med Vet, Lab Epidemiol Mol, Rua Ceara S-N,Bloco 2D,Sala 44, BR-38402018 Uberlandia, MG, Brazil;

    Univ Uberaba, Lab Biol Mol, Av Nene Sabino 1801, BR-38055500 Uberaba, MG, Brazil;

    Univ Fed Uberlandia, Fac Med Vet, Lab Epidemiol Mol, Rua Ceara S-N,Bloco 2D,Sala 44, BR-38402018 Uberlandia, MG, Brazil;

    Univ Fed Uberlandia, Fac Med Vet, Lab Epidemiol Mol, Rua Ceara S-N,Bloco 2D,Sala 44, BR-38402018 Uberlandia, MG, Brazil;

    Univ Fed Uberlandia, Fac Med Vet, Lab Epidemiol Mol, Rua Ceara S-N,Bloco 2D,Sala 44, BR-38402018 Uberlandia, MG, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Antibiotic resistance; Campylobacteriosis; Chicken; Genetic diversity; Slaughterhouse; Virulence;

    机译：抗生素耐药性;弯曲杆菌病;鸡;遗传多样性;屠宰场;毒力;

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