致病性,耐抗生素,形成生物膜的细菌可以通过食用受污染的海鲜而转移给人类。进行本研究是为了确定从孟加拉国海鲜中分离出的形成生物膜的屎肠球菌中的抗生素耐药性和毒力决定因素。共有150份海鲜样本,包括虾(n=50),螃蟹(n=25),和海鱼(n=75),使用文化进行筛选,染色,生物化学,聚合酶链反应(PCR),刚果红(CR),和圆盘扩散(DD)测定。在PCR中,在27.3%(41/150;CI95%20.8;34.9)的样本中检测到屎肠球菌,其中海鱼(34.7%,CI95%24.9;45.9)与螃蟹(32%,CI95%17.2;51.6)和虾(14%,CI95%7.0;26.1)。32(78.1%,CI95%63.3;88.0)的屎肠球菌分离株在CR测试中被确定为生物膜形成剂,其中43.9%(18/41,CI95%29.9;59.0)和34.2%(14/41,CI95%21.6;49.5)的分离物是强和中等生物膜形成物,分别。在PCR中,毒力基因,即,pil(100%),ace(92.7%),agg(68.3%),fsrA(65.9%),凝胶(63.4%),sprE(53.7%),fsrB(51.2%),和fsrC(43.9%),在屎肠球菌分离物中检测到。所有屎肠球菌分离株对≥3种抗菌药物类别和≥3种抗生素具有表型抗性,包括WHO分类的储备抗生素利奈唑胺(70.7%)和磷霉素(19.5%)。此外,多重抗生素耐药指数高达0.8,显示对10种抗生素和8种抗生素的耐药。在这项研究中,与具有中等和非生物膜形成能力的菌株相比,在强生物膜形成型屎肠球菌菌株中,毒力基因和抗生素抗性的流行显著更大(p<0.05)。据我们所知,这项研究,第一次在孟加拉国,在从海产品样品中分离的形成生物膜的屎肠球菌中确定抗生素抗性并检测毒力基因。这项研究的数据可以在评估与摄入未煮熟或最低限度加工的海鲜有关的潜在健康危害方面发挥重要作用。
Pathogenic, antibiotic-resistant, and biofilm-forming bacteria can be transferred to humans through the consumption of contaminated seafood. The present study was carried out to determine antibiotic resistance profiles and virulence determinants in biofilm-forming Enterococcus faecium isolated from seafood in Bangladesh. A total of 150 seafood samples, including shrimp (n = 50), crabs (n = 25), and marine fish (n = 75), were screened using cultural, staining, biochemical, polymerase chain reaction (PCR), Congo red (CR), and disk diffusion (DD) assays. In PCR, E. faecium was detected in 27.3% (41/150; CI95% 20.8; 34.9) of samples, where marine fish (34.7%, CI95% 24.9; 45.9) had the highest prevalence (p < 0.05) compared to crabs (32%, CI95% 17.2; 51.6) and shrimp (14%, CI95% 7.0; 26.1). Thirty-two (78.1%, CI95% 63.3; 88.0) of the E. faecium isolates were determined to be biofilm formers in the CR test, where 43.9% (18/41, CI95% 29.9; 59.0) and 34.2% (14/41, CI95% 21.6; 49.5) of the isolates were strong and intermediate biofilm formers, respectively. In PCR, virulence genes, i.e., pil (100%), ace (92.7%), agg (68.3%), fsrA (65.9%), gelE (63.4%), sprE (53.7%), fsrB (51.2%), and fsrC (43.9%), were detected in E. faecium isolates. All the E. faecium isolates were phenotypically resistant to ≥3 antimicrobial categories and ≥3 antibiotics, including WHO-classified reserve antibiotics linezolid (70.7%) and fosfomycin (19.5%). Moreover, the multiple antibiotic resistance index ranged up to 0.8, showing resistance to ten antibiotics and eight antibiotic classes. In this study, the prevalence of virulence genes and antibiotic resistance was significantly greater (p < 0.05) in strong biofilm-forming E. faecium strains as compared to strains with intermediate and non-biofilm-forming abilities. As far as we know, this study, for the first time in Bangladesh, determined antibiotic resistance and detected virulence genes in biofilm-forming E. faecium isolated from seafood samples. The data from this study could play a significant role in evaluating potential health hazards linked to the ingestion of uncooked or minimally processed seafood.