Microbiomes of commercially-available pine nuts and sesame seeds

被引:4
|
作者
Fay, Megan [1 ]
Salazar, Joelle K. [1 ]
Ramachandran, Padmini [2 ]
Stewart, Diana [1 ]
机构
[1] US FDA, Div Food Proc Sci & Technol, Bedford Pk, IL 60501 USA
[2] US FDA, Div Microbiol, College Pk, MD USA
来源
PLOS ONE | 2021年 / 16卷 / 06期
关键词
SP NOV; GEN; NOV; STREPTOCOCCUS-THERMOPHILUS; CLOACIBACTERIUM-NORMANENSE; RALSTONIA-SOLANACEARUM; CHEMICAL-COMPOSITION; WATER; FOOD; PSEUDOMONAS; BACTERIAL;
D O I
10.1371/journal.pone.0252605
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Metagenomic analysis of food is becoming more routine and can provide important information pertaining to the shelf life potential and the safety of these products. However, less information is available on the microbiomes associated with low water activity foods. Pine nuts and sesame seeds, and food products which contain these ingredients, have been associated with recalls due to contamination with bacterial foodborne pathogens. The objective of this study was to identify the microbial community of pine nuts and sesame seeds using targeted 16S rRNA sequencing technology. Ten different brands of each seed type were assessed, and core microbiomes were determined. A total of 21 and 16 unique taxa with proportional abundances >1% in at least one brand were identified in the pine nuts and sesame seeds, respectively. Members of the core pine nut microbiome included the genera Alishewanella, Aminivibrio, Mycoplasma, Streptococcus, and unassigned OTUs in the families of Desulfobacteraceae and Xanthomonadaceae. For sesame seeds, the core microbiome included Aminivibrio, Chryseolina, Okibacterium, and unassigned OTUs in the family Flavobacteriaceae. The microbiomes of these seeds revealed that these products are dominated by environmental bacterial genera commonly isolated from soil, water, and plants; bacterial genera containing species known as commensal organisms were also identified. Understanding these microbiomes can aid in the risk assessment of these products by identifying food spoilage potential and community members which may co-enrich with foodborne bacterial pathogens.
引用
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页数:16
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