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针对即食(RTE)食品中[具体细菌名称未给出]的噬菌体LPSE1的分离、特性鉴定及应用

Isolation, Characterization, and Application of Bacteriophage LPSE1 Against in Ready to Eat (RTE) Foods.

作者信息

Huang Chenxi, Virk Safiullah M, Shi Jianchun, Zhou Yang, Willias Stephan P, Morsy Mohamed K, Abdelnabby Hazem E, Liu Jie, Wang Xiaohong, Li Jinquan

机构信息

Bio-Medical Center, Key Laboratory of Environment Correlative Dietology, State Key Laboratory of Agricultural Microbiology, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, China.

College of Fisheries, Huazhong Agricultural University, Wuhan, China.

出版信息

Front Microbiol. 2018 May 23;9:1046. doi: 10.3389/fmicb.2018.01046. eCollection 2018.

Abstract

infection is an important foodborne consumer health concern that can be mitigated during food processing. Bacteriophage therapy imparts many advantages over conventional chemical preservatives including pathogen specificity, natural derivation, potency, and providing a high degree of safety. The objective of this study aimed to isolate and characterize a phage that effectively control food contamination. Out of 35 isolated phages, LPSE1 demonstrated a broad host range, robust lytic ability, extensive pH tolerance, and prolonged thermal stability. The capacity for phage LPSE1 to control Enteritidis-ATCC13076 in milk, sausage, and lettuce was established. Incubation of LPSE1 at 28°C in milk reduced recoverable by approximately 1.44 log CFU/mL and 2.37 log CFU/mL at MOI of 1 and 100, respectively, as relative to the phage-excluded control. Upon administration of LPSE1 at an MOI of 1 in sausage, count decreased 0.52 log at 28°C. At MOI of 100, the count decreased 0.49 log at 4°C. Incubation of LPSE1 on lettuce reduced recoverable by 2.02 log 1.71 log, and 1.45 log CFU/mL at an MOI of 1, 10, and 100, respectively, as relative to the negative control. Taken together, these findings establish LPSE1 as an effective weapon against human pathogenic in various ready to eat foods.

摘要

感染是一个重要的食源性消费者健康问题,在食品加工过程中可以得到缓解。噬菌体疗法相对于传统化学防腐剂具有许多优势,包括病原体特异性、天然来源、效力以及提供高度安全性。本研究的目的是分离和鉴定一种能有效控制食品污染的噬菌体。在35株分离出的噬菌体中,LPSE1表现出广泛的宿主范围、强大的裂解能力、广泛的pH耐受性和延长的热稳定性。确定了噬菌体LPSE1在牛奶、香肠和生菜中控制肠炎沙门氏菌-ATCC13076的能力。相对于不含噬菌体的对照,在牛奶中于28°C孵育LPSE1,当感染复数(MOI)为1和100时,可培养菌数分别减少约1.44 log CFU/mL和2.37 log CFU/mL。在香肠中以MOI为1施用LPSE1后,在28°C下菌数减少0.52 log。在MOI为100时,在4°C下菌数减少0.49 log。相对于阴性对照,在生菜上孵育LPSE1,当MOI为1、10和100时,可培养菌数分别减少2.02 log、1.71 log和1.45 log CFU/mL。综上所述,这些发现确立了LPSE1作为对抗各种即食食品中人类致病[细菌名称未完整给出]的有效武器。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b0/5982681/47ce690bab8b/fmicb-09-01046-g001.jpg

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