Broad-Spectrum Salmonella Phages PSE-D1 and PST-H1 Controls Salmonella in Foods

被引：15

作者：

Cao, Yajie ^{[1
,2
,3
,4
]}

Ma, Runwen ^{[1
,2
,3
,4
]}

Li, Ziyong ^{[1
,2
,3
,4
]}

Mao, Xinyu ^{[1
,2
,3
,4
]}

Li, Yinan ^{[1
,2
,3
,4
]}

Wu, Yuxin ^{[1
,2
,3
,4
]}

Wang, Leping ^{[1
,2
,3
,4
]}

Han, Kaiou ^{[1
,2
,3
,4
]}

Li, Lei ^{[1
,2
,3
,4
]}

Ma, Dongxin ^{[1
,2
,3
,4
]}

Zhou, Yuqing ^{[1
,2
,3
,4
]}

Li, Xun ^{[1
,2
,3
,4
]}

Wang, Xiaoye ^{[1
,2
,3
,4
]}

机构：

[1] Guangxi Univ, Coll Anim Sci & Technol, Nanning 530004, Peoples R China

[2] Guangxi Zhuang Autonomous Reg Engn Res Ctr Vet Bio, Nanning 530004, Peoples R China

[3] Guangxi Key Lab Anim Reprod Breeding & Dis Control, Nanning 530004, Peoples R China

[4] Guangxi Coll & Univ, Key Lab Prevent & Control Anim Dis, Nanning 530004, Peoples R China

来源：

VIRUSES-BASEL | 2022年 / 14卷 / 12期

关键词：

Salmonella; broad-spectrum bacteriophages; food contamination; biocontrol; ESCHERICHIA-COLI O157H7; BACTERIOPHAGE; TYPHIMURIUM; ENTERITIDIS; INFECTION;

D O I：

10.3390/v14122647

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Food contamination by Salmonella can lead to serious foodborne diseases that constantly threaten public health. Innovative and effective strategies are needed to control foodborne pathogenic contamination since the incidence of foodborne diseases has increased gradually. In the present study, two broad-spectrum phages named Salmonella phage PSE-D1 and Salmonella phage PST-H1 were isolated from sewage in China. Phages PSE-D1 and PST-H1 were obtained by enrichment with Salmonella enterica subsp. enterica serovar Enteritidis (S. Enteritidis) CVCC1806 and Salmonella enterica subsp. enterica serovar Typhimurium (S. Typhimurium) CVCC3384, respectively. They were able to lyse Salmonella, E. coli and K. pneumoniae and exhibited broad host range. Further study demonstrated that PSE-D1 and PST-H1 showed high pH and thermal tolerances. Phage PSE-D1 belongs to the Jiaodavirus genus, Tevenvirinae subfamily, while phage PST-H1 belongs to the Jerseyvirus genus, Guernseyvirinae subfamily according to morphology and phylogeny. The results of genome analysis showed that PSE-D1 and PST-H1 lack virulence and drug-resistance genes. The effects of PSE-D1 and PST-H1 on controlling S. Enteritidis CVCC1806 and S. Typhimurium CVCC3384 contamination in three kinds of foods (eggshells, sausages and milk) were further investigated, respectively. Our results showed that, compared to phage-free groups, PSE-D1 and PST-H1 inhibited the growth of their host strain significantly. A significant reduction of host bacteria titers (1.5 and 1.9 log(10) CFU/sample, p < 0.001) on eggshells was observed under PSE-D1 and PST-H1 treatments, respectively. Furthermore, administration of PSE-D1 and PST-H1 decreased the counts of bacteria by 1.1 and 1.2 log(10) CFU/cm(2) (p < 0.001) in sausages as well as 1.5 and 1.8 log(10) CFU/mL (p < 0.001) in milk, respectively. Interesting, the bacteriostasis efficacy of both phages exhibited more significantly at 4 degrees C than that at 28 degrees C in eggshells and milk and sausages. In sum, the purpose of our research was evaluating the counteracting effect of phage PSE-D1 and PST-H1 on the spread of Salmonella on contaminated foods products. Our results suggested that these two phage-based biocontrol treatments are promising strategies for controlling pathogenic Salmonella contaminated food.

引用

页数：18

共 42 条

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