Impact of mixed biofilm formation with environmental microorganisms on E. coli O157:H7 survival against sanitization

被引：34
作者：
Dass, Sapna Chitlapilly [1 ]
Bosilevac, Joseph M. [2 ]
Weinroth, Maggie [2 ]
Elowsky, Christian G. [3 ]
Zhou, You [4 ]
Anandappa, Angela [5 ]
Wang, Rong [2 ,6 ]
机构：
[1] Texas A&M Univ, Dept Anim Sci, College Stn, TX 77845 USA
[2] USDA, Roman L Hruska US Meat Anim Res Ctr, Clay Ctr, Lincoln, NE 68933 USA
[3] Univ Nebraska, Dept Agron & Hort, Lincoln, NE 68588 USA
[4] Univ Nebraska, Ctr Biotechnol, Lincoln, NE 68588 USA
[5] Univ Nebraska, Dept Food Sci, Alliance Adv Sanitat, Food Innovat Campus, Lincoln, NE 68588 USA
[6] ARS, Roman L Hruska US Meat Anim Res Ctr, Clay Ctr, Lincoln, NE 68933 USA
来源：
NPJ SCIENCE OF FOOD | 2020年 / 4卷 / 01期
关键词：
ESCHERICHIA-COLI; RESISTANCE; O157/H7; STRAINS; BEEF; MONOCYTOGENES;
D O I：
10.1038/s41538-020-00076-x
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
Biofilm formation by foodborne pathogens is a serious threat to food safety and public health. Meat processing plants may harbor various microorganisms and occasional foodborne pathogens; thus, the environmental microbial community might impact pathogen survival via mixed biofilm formation. We collected floor drain samples from two beef plants with different E. coli O157:H7 prevalence history and investigated the effects of the environmental microorganisms on pathogen sanitizer tolerance. The results showed that biofilm forming ability and bacterial species composition varied considerably based on the plants and drain locations. E. coli O157:H7 cells obtained significantly higher sanitizer tolerance in mixed biofilms by samples from the plant with recurrent E. coli O157:H7 prevalence than those mixed with samples from the other plant. The mixed biofilm that best protected E. coli O157:H7 also had the highest species diversity. The percentages of the species were altered significantly after sanitization, suggesting that the community composition affects the role and tolerance level of each individual species. Therefore, the unique environmental microbial community, their ability to form biofilms on contact surfaces and the interspecies interactions all play roles in E. coli O157:H7 persistence by either enhancing or reducing pathogen survival within the biofilm community.
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页数：9
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