de Vasconcelos Byrne Vanessa, Hofer Ernesto, Vallim Deyse Christina, de Castro Almeida Rogeria Comastri
Pharmacy Faculty, Federal University of Bahia, Rua Barão de Geremoabo, Salvador, BA, Brazil.
Laboratory of Bacterial Zoonoses, Oswaldo Cruz Institute, Pavilhão Rocha Lima, Rio de Janeiro, RJ, Brazil.
Braz J Microbiol. 2016 Apr-Jun;47(2):438-43. doi: 10.1016/j.bjm.2015.11.033. Epub 2016 Mar 2.
Although the consumption of fresh and minimally processed vegetables is considered healthy, outbreaks related to the contamination of these products are frequently reported. Among the food-borne pathogens that contaminate vegetables is Listeria monocytogenes, a ubiquitous organism that exhibits the ability to survive and multiply at refrigerated temperatures. This study aimed to evaluate the occurrence of L. monocytogenes in vegetables as well as the antimicrobial resistance of isolates. The results showed that 3.03% of samples were contaminated with L. monocytogenes, comprising 2.22% of raw vegetables and 5.56% of ready-to-eat vegetables. Multiplex PCR confirmed the virulence potential of the isolates. Antimicrobial resistance profiling showed that 50% of the isolates were susceptible to the antibiotics used. The resistance of one isolate to penicillin G, a commonly employed therapeutic agent, and the presence of serotype 4b, a serotype commonly associated with food-borne outbreaks, could be potential health hazards for consumers.
尽管食用新鲜和最少加工的蔬菜被认为是健康的,但与这些产品污染相关的疫情仍经常被报道。污染蔬菜的食源性病原体中包括单核细胞增生李斯特菌,这是一种无处不在的微生物,具有在冷藏温度下存活和繁殖的能力。本研究旨在评估蔬菜中单核细胞增生李斯特菌的发生率以及分离株的抗菌耐药性。结果表明,3.03%的样本被单核细胞增生李斯特菌污染,其中包括2.22%的生蔬菜和5.56%的即食蔬菜。多重PCR证实了分离株的毒力潜力。抗菌耐药性分析表明,50%的分离株对所用抗生素敏感。一株分离株对常用治疗药物青霉素G的耐药性以及与食源性疫情通常相关的血清型4b的存在,可能对消费者构成潜在健康危害。