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Biofilm forming properties of quinolone resistant Escherichia coli from the broiler production chain and their dynamics in mixed biofilms.
BMC Microbiology ( IF 4.0 ) Pub Date : 2020-03-04 , DOI: 10.1186/s12866-020-01730-w
Live L Nesse 1 , Ane Mohr Osland 1 , Solveig S Mo 1 , Camilla Sekse 1 , Jannice S Slettemeås 1 , Anna Eline E Bruvoll 1 , Anne Margrete Urdahl 1 , Lene K Vestby 1
Affiliation  

Quinolone resistant Escherichia coli (QREC) have been found in samples from Norwegian broiler chicken, despite quinolones not being administered to poultry in Norway. Biofilm production may be one factor contributing to the observed persistence in the broiler production chain. In the present study, 158 QREC strains from chicken caecal and retail meat samples were screened for biofilm production in microtiter plates, biofilm morphotype on Congo Red (CR) agar plates and phylotype by multiplex PCR. Furthermore, the dynamics in mixed biofilms with strains of different morphotypes were studied on glass slides and on CR agar plates. All strains but one produced biofilm in microtiter plates and/or on CR agar plates at room temperature. There were no differences between strains from chicken caecum and chicken retail meat in the mean amount of biofilm produced in microtiter plates. Furthermore, no differences in biofilm production were observed between phylotypes. However, significant differences in biofilm production were found between biofilm morphotypes. The morphotype RDAR (red dry and rough, which has both curli and cellulose in the matrix, was displayed by 70% of the strains. Mean biofilm production by these strains were significantly higher than by strains with the morphotypes PDAR (pink dry and rough) with only cellulose or BDAR (brown dry and rough) with only curli. Interestingly, the two latter morphotypes produced biofilms with the morphotype RDAR when grown together. None of the strains achieved significantly higher numbers of colony forming units (cfu) in mixed biofilms than in single strain biofilms on glass slides. The results indicate that QREC can form biofilm reservoirs on both inert and organic surfaces in production environments, as well as on meat. This may contribute to persistence and dissemination of the strains. Strains with both curli and cellulose in the biofilm matrix were significantly better biofilm formers than strains lacking one of these components. However, strains with only one of the components could compensate for this by producing mixed biofilms with strains having the other component, and thereby most likely enhance their probabilities of persistence in the production environment.

中文翻译:

肉鸡生产链中对喹诺酮类耐药的大肠杆菌的生物膜形成特性及其在混合生物膜中的动力学。

尽管在挪威的家禽中没有服用喹诺酮,但在挪威肉鸡的样品中发现了对喹诺酮类耐药的大肠杆菌(QREC)。生物膜产量可能是导致肉鸡生产链持续存在的一个因素。在本研究中,从鸡盲肠和零售肉类样品中筛选了158种QREC菌株,以在微量滴定板中生产生物膜,在刚果红(CR)琼脂板上的生物膜形态和通过多重PCR的系统型。此外,在载玻片和CR琼脂平板上研究了具有不同形态型菌株的混合生物膜的动力学。在室温下,除一种菌株外,所有菌株均在微量滴定板和/或CR琼脂板上产生生物膜。在微量滴定板中产生的生物膜的平均数量方面,来自盲肠和零售鸡肉的菌株之间没有差异。此外,系统型之间没有观察到生物膜产量的差异。但是,在生物膜形态类型之间发现了生物膜产量的显着差异。70%的菌株显示了RDAR的形态型(红色干燥和粗糙,在基质中同时具有卷曲和纤维素),这些菌株的平均生物膜产量显着高于PDAR形态的菌株(粉红色和粗糙)有趣的是,后两种形态学在一起生长时会产生具有形态学雷达的生物膜。在混合生物膜中,没有一个菌株比载玻片上的单个菌株生物膜中的菌落形成单位(cfu)明显多。结果表明,QREC可以在生产环境中的惰性和有机表面以及肉上形成生物膜储层。这可能有助于菌株的持久性和传播。与缺乏这些成分之一的菌株相比,在生物膜基质中同时具有卷曲和纤维素的菌株是更好的生物膜形成剂。然而,仅具有一种组分的菌株可以通过产生具有另一种组分的菌株的混合生物膜来补偿这一点,从而最有可能增强其在生产环境中持久的可能性。结果表明,QREC可以在生产环境中的惰性和有机表面以及肉上形成生物膜储层。这可能有助于菌株的持久性和传播。与缺乏这些成分之一的菌株相比,在生物膜基质中同时具有卷曲和纤维素的菌株是更好的生物膜形成剂。然而,仅具有一种组分的菌株可以通过产生具有另一种组分的菌株的混合生物膜来补偿这一点,从而最有可能增强其在生产环境中持久的可能性。结果表明,QREC可以在生产环境中的惰性和有机表面以及肉上形成生物膜储层。这可能有助于菌株的持久性和传播。与缺乏这些成分之一的菌株相比,在生物膜基质中同时具有卷曲和纤维素的菌株是更好的生物膜形成剂。然而,仅具有一种组分的菌株可以通过产生具有另一种组分的菌株的混合生物膜来补偿这一点,从而最有可能增强其在生产环境中持久的可能性。与缺乏这些成分之一的菌株相比,在生物膜基质中同时具有卷曲和纤维素的菌株是更好的生物膜形成剂。然而,仅具有一种组分的菌株可以通过产生具有另一种组分的菌株的混合生物膜来补偿这一点,从而最有可能增强其在生产环境中持久的可能性。与缺乏这些成分之一的菌株相比,在生物膜基质中同时具有卷曲和纤维素的菌株是更好的生物膜形成剂。然而,仅具有一种组分的菌株可以通过产生具有另一种组分的菌株的混合生物膜来补偿这一点,从而最有可能增强其在生产环境中持久的可能性。
更新日期:2020-03-04
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