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Zhang X, Gao Y, Zhao C, Wang L, Wen S, Shi B, Zhu L, Wang J, Kim YM, Wang J. Rhizosphere bacteria G-H27 significantly promoted the degradation of chlorpyrifos and fosthiazate. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:169838. [PMID: 38232838 DOI: 10.1016/j.scitotenv.2023.169838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/21/2023] [Accepted: 12/30/2023] [Indexed: 01/19/2024]
Abstract
Microbial remediation of polluted environments is the most promising and significant research direction in the field of bioremediation. In this study, chlorpyrifos and fosthiazate were selected as representative organophosphorus pesticides, wheat was the tested plant, and fluorescently labeled degrading Bacillus cereus G-H27 were the film-forming bacteria. Exogenous strengthening technology was used to establish degrading bacterial biofilms on the root surface of wheat. The influence of root surface-degrading bacterial biofilms on the enrichment of chlorpyrifos and fosthiazate in wheat was comprehensively evaluated. First, the fluorescently-labeled degrading bacteria G-H27 was constructed, and its film-forming ability was investigated. Second, the growth- promoting characteristics and degradation ability of the bacteria G-H27 were investigated. Finally, the degradation effect of the root surface-degrading bacterial biofilm on chlorpyrifos and fosthiazate was determined. The above research provides an important material basis and method for the bioremediation of pesticide-contaminated soil.
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Affiliation(s)
- Xuzhi Zhang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China
| | - Yuanfei Gao
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China
| | - Changyu Zhao
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China
| | - Lanjun Wang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China.
| | - Shengfang Wen
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China
| | - Baihui Shi
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China
| | - Lusheng Zhu
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China.
| | - Jun Wang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China.
| | - Young Mo Kim
- Department of Civil and Environmental Engineering, Hanyang University, Seongdong-gu, Seoul 04763, Republic of Korea.
| | - Jinhua Wang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, People's Republic of China.
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2
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Obe T, Kiess AS, Nannapaneni R. Antimicrobial Tolerance in Salmonella: Contributions to Survival and Persistence in Processing Environments. Animals (Basel) 2024; 14:578. [PMID: 38396546 PMCID: PMC10886206 DOI: 10.3390/ani14040578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/01/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
Salmonella remains a top bacterial pathogen implicated in several food-borne outbreaks, despite the use of antimicrobials and sanitizers during production and processing. While these chemicals have been effective, Salmonella has shown the ability to survive and persist in poultry processing environments. This can be credited to its microbial ability to adapt and develop/acquire tolerance and/or resistance to different antimicrobial agents including oxidizers, acids (organic and inorganic), phenols, and surfactants. Moreover, there are several factors in processing environments that can limit the efficacy of these antimicrobials, thus allowing survival and persistence. This mini-review examines the antimicrobial activity of common disinfectants/sanitizers used in poultry processing environments and the ability of Salmonella to respond with innate or acquired tolerance and survive exposure to persists in such environments. Instead of relying on a single antimicrobial agent, the right combination of different disinfectants needs to be developed to target multiple pathways within Salmonella.
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Affiliation(s)
- Tomi Obe
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - Aaron S. Kiess
- Prestage Department of Poultry Science, College of Agriculture and Life Sciences, North Carolina State University, Raleigh, NC 27695, USA;
| | - Ramakrishna Nannapaneni
- Department of Food Science, Nutrition and Health Promotion, Mississippi State University, Mississippi, MS 39762, USA;
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3
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Ban GH, Kim SH, Kang DH, Park SH. Comparison of the efficacy of physical and chemical strategies for the inactivation of biofilm cells of foodborne pathogens. Food Sci Biotechnol 2023; 32:1679-1702. [PMID: 37780592 PMCID: PMC10533464 DOI: 10.1007/s10068-023-01312-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 04/03/2023] [Accepted: 04/13/2023] [Indexed: 10/03/2023] Open
Abstract
Biofilm formation is a strategy in which microorganisms generate a matrix of extracellular polymeric substances to increase survival under harsh conditions. The efficacy of sanitization processes is lowered when biofilms form, in particular on industrial devices. While various traditional and emerging technologies have been explored for the eradication of biofilms, cell resistance under a range of environmental conditions renders evaluation of the efficacy of control challenging. This review aimed to: (1) classify biofilm control measures into chemical, physical, and combination methods, (2) discuss mechanisms underlying inactivation by each method, and (3) summarize the reduction of biofilm cells after each treatment. The review is expected to be useful for future experimental studies and help to guide the establishment of biofilm control strategies in the food industry.
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Affiliation(s)
- Ga-Hee Ban
- Department of Food Science and Biotechnology, Ewha Womans University, Seoul, 03760 Republic of Korea
| | - Soo-Hwan Kim
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute of Agricultural and Life Sciences, Seoul National University, Seoul, 08826 Republic of Korea
| | - Dong-Hyun Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute of Agricultural and Life Sciences, Seoul National University, Seoul, 08826 Republic of Korea
| | - Sang-Hyun Park
- Department of Food Science and Technology, Kongju National University, Yesan, Chungnam 32439 Republic of Korea
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4
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Alessiani A, La Bella G, Donatiello A, Occhiochiuso G, Faleo S, Didonna A, D’Attoli L, Selicato P, Pedarra C, La Salandra G, Mancini ME, Di Taranto P, Goffredo E. Occurrence of a New Variant of Salmonella Infantis Lacking Somatic Antigen. Microorganisms 2023; 11:2274. [PMID: 37764118 PMCID: PMC10538023 DOI: 10.3390/microorganisms11092274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/04/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Salmonella Infantis is one of the most frequent serovars reported in broilers and is also regularly identified in human salmonellosis cases, representing a relevant public health problem. In the laboratories of the Istituto Zooprofilattico Sperimentale della Puglia e della Basilicata (IZSPB), six Salmonella Infantis strains with antigenic formula -:r:1,5 have been isolated from the litter and carcass of broilers between 2018 and 2022. The strains were investigated to evaluate their phenotype, antibiotic resistance and genomic profiles. Genomic analysis confirmed that the isolates belonged to the Infantis serotype and to the sequence type ST32. Moreover, all strains showed a multidrug-resistant (MDR) profile and were characterised by the presence of the IncFIB plasmid incompatibility group. Three strains had the blaCTX-M-1 gene, and one of them carried IncX1. The presence of this new variant of S. Infantis is particularly relevant because it could expand the landscape of the S. Infantis population. The absence of the somatic antigen could pose a problem in both isolation and serotyping and a consequent public health concern due to the spread of Salmonella infection.
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Affiliation(s)
- Alessandra Alessiani
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise, Via Campo Boario 1, 64100 Teramo, Italy
| | - Gianfranco La Bella
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Adelia Donatiello
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Gilda Occhiochiuso
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Simona Faleo
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Antonella Didonna
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Luigi D’Attoli
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Patrizia Selicato
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Carmine Pedarra
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Giovanna La Salandra
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Maria Emanuela Mancini
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Pietro Di Taranto
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
| | - Elisa Goffredo
- Istituto Zooprofilattico Sperimentare della Puglia e della Basilicata, Via Manfredonia 20, 71121 Foggia, Italy
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Guest K, Whalley T, Maillard JY, Artemiou A, Szomolay B, Webber MA. Responses of Salmonella biofilms to oxidizing biocides: Evidence of spatial clustering. Environ Microbiol 2022; 24:6426-6438. [PMID: 36300582 PMCID: PMC10099496 DOI: 10.1111/1462-2920.16263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 10/25/2022] [Indexed: 01/12/2023]
Abstract
The spatial organization of biofilm bacterial communities can be influenced by several factors, including growth conditions and challenge with antimicrobials. Differential survival of clusters of cells within biofilms has been observed. In this work, we present a variety of methods to identify, quantify and statistically analyse clusters of live cells from images of two Salmonella strains with differential biofilm forming capacity exposed to three oxidizing biocides. With a support vector machine approach, we showed spatial separation between the two strains, and, using statistical testing and high-performance computing (HPC), we determined conditions which possess an inherent cluster structure. Our results indicate that there is a relationship between biocide potency and inherent biofilm formation capacity with the tendency to select for spatial clusters of survivors. There was no relationship between positions of clusters of live or dead cells within stressed biofilms. This work identifies an approach to robustly quantify clusters of physiologically distinct cells within biofilms and suggests work to understand how clusters form and survive is needed. SIGNIFICANCE STATEMENT: Control of biofilm growth remains a major challenge and there is considerable uncertainty about how bacteria respond to disinfection within a biofilm and how clustering of cells impacts survival. We have developed a methodological approach to identify and statistically analyse clusters of surviving cells in biofilms after biocide challenge. This approach can be used to understand bacterial behaviour within biofilms under stress and is widely applicable.
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Affiliation(s)
- Kerry Guest
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | | | - Jean-Yves Maillard
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | | | | | - Mark A Webber
- Quadram Institute Bioscience, Norwich Research Park, UK.,Norwich Medical School, University of East Anglia, Norwich Research Park, UK
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Kazemzadeh P, Khorram S, Mahmoudzadeh M, Ehsani A. Effect of atmospheric cold plasma (ACP) on chlorine adapted Salmonella enterica on spring onion. Lett Appl Microbiol 2022; 75:1307-1318. [PMID: 35930630 DOI: 10.1111/lam.13799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/18/2022] [Accepted: 08/01/2022] [Indexed: 11/28/2022]
Abstract
One of the main drawbacks of chlorine disinfectants is the emergence of chlorine adapted (CA) or resistant microbial cells. This research aimed to investigate the effect of chlorine adaptation on resistance of Salmonella enterica upon atmospheric cold plasma (ACP) application at different voltages (6, 8, and 11 kV) and times (5, 10, and 15 min). Due to higher conversion efficiency and reduced dielectric barrier discharge (DBD) power consumption, this method was used for cold plasma generation in this study. A higher lethality effect was observed from a higher voltage and longest times (11 kV-15 min) on CA S. enterica than non-CA (p<0.05). Still, it induced higher percentages of injured cells in CA (58.77%) than non-CA (0.61%) (p<0.05). The highest ACP effect on the inactivation of the indigenous natural flora of onion leaves was observed at the lowest voltage (p<0.05). More than 3 log CFU/g reduction (p<0.05) was observed at 6 kV after 5 and 10 min. ACP reduced CA and non-CA S. enterica cells on onion leaf surface to a lower extent than pure treated cells in broth media. Nevertheless similar to broth media, a high percentage of injury (61.03%) was induced on CA cells at higher voltage (11 kV-10 min) compared to non-CA (2.15%) (p<0.05). Biofilm results revealed ACP application (6 kV-5 min) reduced average ODs in CA and non-CA cells (p<0.05). Chlorine adaptation and ACP treatment influenced the antibiotic resistance pattern according to applied voltage, time, and antibiotic type. The finding showed despite highest lethality of high voltages and long times (11 kV-15 min), given the high percentages of injured cells, lower voltages may offer acceptable inactivation of pathogenic bacteria with lower injury induction. In conclusion, ACP has the potential ability to eliminate CA cells of S. enterica, which is predominant in fresh-cut vegetable outbreaks.
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Affiliation(s)
- Parisa Kazemzadeh
- Student Research Committee, Department of Food Science and Technology, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Food Science and Technology, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sirous Khorram
- Physics Faculty, University of Tabriz, 51666-, 16471, Tabriz, Iran.,Research Institute for Applied Physics and Astronomy, Applied and Industrial Plasma Lab., University of Tabriz, 51666-, 16471, Tabriz, Iran
| | - Maryam Mahmoudzadeh
- Department of Food Science and Technology, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran.,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Ehsani
- Department of Food Science and Technology, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
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7
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Anti-Biofilms’ Activity of Garlic and Thyme Essential Oils against Salmonella typhimurium. Molecules 2022; 27:molecules27072182. [PMID: 35408576 PMCID: PMC9000680 DOI: 10.3390/molecules27072182] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/17/2022] [Accepted: 03/23/2022] [Indexed: 01/23/2023] Open
Abstract
Biofilm control by essential oil (EO) application has recently increased to preclude biofilm production on foods and environmental surfaces. In this work, the anti-biofilm effects of garlic and thyme essential oils using the minimum inhibitory concentration (MIC) method against Salmonella typhimurium recovered from different abattoir samples were investigated along with the virulence genes (InvA, SdiA and Stn genes), and the antimicrobial susceptibility profile of S. typhimurium as well. The obtained results revealed that S. typhimurium contaminated abattoir samples to varying degrees. The InvA gene was investigated in all isolates, whereas the SdiA and Stn genes were observed in four and three isolates, respectively. Utilizing the disc diffusion method, S. typhimurium isolates demonstrated substantial resistance to most of the examined antibiotics with a high multiple antibiotic resistance index. S. typhimurium isolates demonstrated biofilm formation abilities to various degrees at varied temperatures levels (4 °C and 37 °C). In conclusion, the obtained samples from the research area are regarded as a potential S. typhimurium contamination source. Furthermore, garlic essential oil (GEO) has more potential to inhibit S. typhimurium biofilm at different sub-minimum inhibitory concentrations as compared to thyme essential oil (TEO). Therefore, these EOs are considered as potential natural antibacterial options that could be applied in food industry.
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8
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Kim SH, Jyung S, Kang DH. Comparative study of Salmonella Typhimurium biofilms and their resistance depending on cellulose secretion and maturation temperatures. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112700] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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9
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Nahar S, Jeong HL, Kim Y, Ha AJW, Roy PK, Park SH, Ashrafudoulla M, Mizan MFR, Ha SD. Inhibitory effects of Flavourzyme on biofilm formation, quorum sensing, and virulence genes of foodborne pathogens Salmonella Typhimurium and Escherichia coli. Food Res Int 2021; 147:110461. [PMID: 34399461 DOI: 10.1016/j.foodres.2021.110461] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/23/2021] [Accepted: 05/23/2021] [Indexed: 12/23/2022]
Abstract
Salmonella enterica and Shiga toxin-producing (or verotoxin-producing) Escherichia coli are major foodborne pathogens, posing substantial food safety risks. Due to the negative effects of chemical treatment against foodborne pathogens, the application of enzyme-based techniques is currently receiving great attention. Here, we evaluated the inhibitory properties of Flavourzyme, a commercial peptidase, against these two foodborne pathogens. We noticed 4.0 and 5.5 log inhibition of biofilm formation by S. Typhimurium and E. coli, respectively, while treated with sub-minimum inhibitory concentrations of Flavourzyme for 24 h. For both bacteria, the enzyme exhibited quorum-quenching activity, preventing autoinducer-2 production completely by E. coli. In addition, Flavourzyme significantly suppressed the relative expression levels of biofilm-forming, quorum sensing, and virulence regulatory genes as measured by qRT-PCR. Based on our results, we suggest the use of Flavourzyme as a preventive agent against foodborne pathogens that possibly acts by inhibiting bacterial self-defense mechanisms following disruption of cellular proteins. This finding may shed light on how enzymes can be applied as a novel weapon to control foodborne illnesses to ensure food safety and public health.
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Affiliation(s)
- Shamsun Nahar
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Ha Lim Jeong
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Younsoo Kim
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Angela Jie-Won Ha
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Pantu Kumar Roy
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Si Hong Park
- Department of Food Science & Technology, Oregon State University, Corvallis, OR, USA
| | - Md Ashrafudoulla
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Md Furkanur Rahaman Mizan
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Sang-Do Ha
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea.
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Gupta A, Bansal M, Wagle B, Sun X, Rath N, Donoghue A, Upadhyay A. Sodium Butyrate Reduces Salmonella Enteritidis Infection of Chicken Enterocytes and Expression of Inflammatory Host Genes in vitro. Front Microbiol 2020; 11:553670. [PMID: 33042060 PMCID: PMC7524895 DOI: 10.3389/fmicb.2020.553670] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 08/27/2020] [Indexed: 12/14/2022] Open
Abstract
Salmonella Enteritidis (SE) is a facultative intracellular pathogen that colonizes the chicken gut leading to contamination of carcasses during processing. A reduction in intestinal colonization by SE could result in reduced carcass contamination thereby reducing the risk of illnesses in humans. Short chain fatty acids such as butyrate are microbial metabolites produced in the gut that exert various beneficial effects. However, its effect on SE colonization is not well known. The present study investigated the effect of sub-inhibitory concentrations (SICs) of sodium butyrate on the adhesion and invasion of SE in primary chicken enterocytes and chicken macrophages. In addition, the effect of sodium butyrate on the expression of SE virulence genes and selected inflammatory genes in chicken macrophages challenged with SE were investigated. Based on the growth curve analysis, the two SICs of sodium butyrate that did not reduce SE growth were 22 and 45 mM, respectively. The SICs of sodium butyrate did not affect the viability and proliferation of chicken enterocytes and macrophage cells. The SICs of sodium butyrate reduced SE adhesion by ∼1.7 and 1.8 Log CFU/mL, respectively. The SE invasion was reduced by ∼2 and 2.93 Log CFU/mL, respectively in chicken enterocytes (P < 0.05). Sodium butyrate did not significantly affect the adhesion of SE to chicken macrophages. However, 45 mM sodium butyrate reduced invasion by ∼1.7 Log CFU/mL as compared to control (P < 0.05). Exposure to sodium butyrate did not change the expression of SE genes associated with motility (flgG, prot6E), invasion (invH), type 3 secretion system (sipB, pipB), survival in macrophages (spvB, mgtC), cell wall and membrane integrity (tatA), efflux pump regulator (mrr1) and global virulence regulation (lrp) (P > 0.05). However, a few genes contributing to type-3 secretion system (ssaV, sipA), adherence (sopB), macrophage survival (sodC) and oxidative stress (rpoS) were upregulated by at least twofold. The expression of inflammatory genes (Il1β, Il8, and Mmp9) that are triggered by SE for host colonization was significantly downregulated (at least 25-fold) by sodium butyrate as compared to SE (P < 0.05). The results suggest that sodium butyrate has an anti-inflammatory potential to reduce SE colonization in chickens.
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Affiliation(s)
- Anamika Gupta
- Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
| | - Mohit Bansal
- Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
| | - Basanta Wagle
- Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
| | - Xiaolun Sun
- Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
| | - Narayan Rath
- Poultry Production and Product Safety Research Unit, United States Department of Agriculture-Agriculture Research Station, Fayetteville, AR, United States
| | - Annie Donoghue
- Poultry Production and Product Safety Research Unit, United States Department of Agriculture-Agriculture Research Station, Fayetteville, AR, United States
| | - Abhinav Upadhyay
- Department of Animal Science, University of Connecticut, Storrs, CT, United States
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11
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da Cruz Nizer WS, Inkovskiy V, Overhage J. Surviving Reactive Chlorine Stress: Responses of Gram-Negative Bacteria to Hypochlorous Acid. Microorganisms 2020; 8:E1220. [PMID: 32796669 PMCID: PMC7464077 DOI: 10.3390/microorganisms8081220] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/30/2020] [Accepted: 08/09/2020] [Indexed: 01/29/2023] Open
Abstract
Sodium hypochlorite (NaOCl) and its active ingredient, hypochlorous acid (HOCl), are the most commonly used chlorine-based disinfectants. HOCl is a fast-acting and potent antimicrobial agent that interacts with several biomolecules, such as sulfur-containing amino acids, lipids, nucleic acids, and membrane components, causing severe cellular damage. It is also produced by the immune system as a first-line of defense against invading pathogens. In this review, we summarize the adaptive responses of Gram-negative bacteria to HOCl-induced stress and highlight the role of chaperone holdases (Hsp33, RidA, Cnox, and polyP) as an immediate response to HOCl stress. We also describe the three identified transcriptional regulators (HypT, RclR, and NemR) that specifically respond to HOCl. Besides the activation of chaperones and transcriptional regulators, the formation of biofilms has been described as an important adaptive response to several stressors, including HOCl. Although the knowledge on the molecular mechanisms involved in HOCl biofilm stimulation is limited, studies have shown that HOCl induces the formation of biofilms by causing conformational changes in membrane properties, overproducing the extracellular polymeric substance (EPS) matrix, and increasing the intracellular concentration of cyclic-di-GMP. In addition, acquisition and expression of antibiotic resistance genes, secretion of virulence factors and induction of the viable but nonculturable (VBNC) state has also been described as an adaptive response to HOCl. In general, the knowledge of how bacteria respond to HOCl stress has increased over time; however, the molecular mechanisms involved in this stress response is still in its infancy. A better understanding of these mechanisms could help understand host-pathogen interactions and target specific genes and molecules to control bacterial spread and colonization.
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Affiliation(s)
| | | | - Joerg Overhage
- Department of Health Sciences, Carleton University, Ottawa, ON K1S 5B6, Canada; (W.S.d.C.N.); (V.I.)
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