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Yu X, Yuan J, Shi L, Dai S, Yue L, Yan M. Necroptosis in bacterial infections. Front Immunol 2024; 15:1394857. [PMID: 38933265 PMCID: PMC11199740 DOI: 10.3389/fimmu.2024.1394857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 05/29/2024] [Indexed: 06/28/2024] Open
Abstract
Necroptosis, a recently discovered form of cell-programmed death that is distinct from apoptosis, has been confirmed to play a significant role in the pathogenesis of bacterial infections in various animal models. Necroptosis is advantageous to the host, but in some cases, it can be detrimental. To understand the impact of necroptosis on the pathogenesis of bacterial infections, we described the roles and molecular mechanisms of necroptosis caused by different bacterial infections in this review.
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Affiliation(s)
- Xing Yu
- Department of Pathogen Biology and Immunology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, China
| | - Jin Yuan
- Clinical Laboratory, Puer Hospital of Traditional Chinese Medicine, Puer, China
| | - Linxi Shi
- Department of Pathogen Biology and Immunology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, China
| | - Shuying Dai
- Department of Pathogen Biology and Immunology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, China
| | - Lei Yue
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Min Yan
- Department of Pathogen Biology and Immunology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, China
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2
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Cheong Y, Lee JB, Kim SK, Yoon JW. Characterization of Salmonella species from poultry slaughterhouses in South Korea: carry-over transmission of Salmonella Thompson ST292 in slaughtering process. J Vet Sci 2024; 25:e39. [PMID: 38834509 PMCID: PMC11156591 DOI: 10.4142/jvs.24053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/02/2024] [Accepted: 04/22/2024] [Indexed: 06/06/2024] Open
Abstract
IMPORTANCE Salmonella outbreaks linked to poultry meat have been reported continuously worldwide. Therefore, Salmonella contamination of poultry meats in slaughterhouses is one of the critical control points for reducing disease outbreaks in humans. OBJECTIVE This study examined the carry-over contamination of Salmonella species through the entire slaughtering process in South Korea. METHODS From 2018 to 2019, 1,097 samples were collected from the nine slaughterhouses distributed nationwide. One hundred and seventeen isolates of Salmonella species were identified using the invA gene-specific polymerase chain reaction, as described previously. The serotype, phylogeny, and antimicrobial resistance of isolates were examined. RESULTS Among the 117 isolates, 93 were serotyped into Salmonella Mbandaka (n = 36 isolates, 30.8%), Salmonella Thompson (n = 33, 28.2%), and Salmonella Infantis (n = 24, 20.5%). Interestingly, allelic profiling showed that all S. Mbandaka isolates belonged to the lineage of the sequence type (ST) 413, whereas all S. Thompson isolates were ST292. Moreover, almost all S. Thompson isolates (97.0%, 32/33 isolates) belonging to ST292 were multidrug-resistant and possessed the major virulence genes whose products are required for full virulence. Both serotypes were distributed widely throughout the slaughtering process. Pulsed-field gel electrophoretic analysis demonstrated that seven S. Infantis showed 100% identities in their phylogenetic relatedness, indicating that they were sequentially transmitted along the slaughtering processes. CONCLUSIONS AND RELEVANCE This study provides more evidence of the carry-over transmission of Salmonella species during the slaughtering processes. ST292 S. Thompson is a potential pathogenic clone of Salmonella species possibly associated with foodborne outbreaks in South Korea.
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Affiliation(s)
- Yewon Cheong
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Jun Bong Lee
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Se Kye Kim
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Jang Won Yoon
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
- The YOON Healthtech Co., Ltd, Chuncheon 24341, Korea.
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3
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Disease Occurrence in- and the Transferal of Zoonotic Agents by North American Feedlot Cattle. Foods 2023; 12:foods12040904. [PMID: 36832978 PMCID: PMC9956193 DOI: 10.3390/foods12040904] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/13/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
North America is a large producer of beef and contains approximately 12% of the world's cattle inventory. Feedlots are an integral part of modern cattle production in North America, producing a high-quality, wholesome protein food for humans. Cattle, during their final stage, are fed readily digestible high-energy density rations in feedlots. Cattle in feedlots are susceptible to certain zoonotic diseases that impact cattle health, growth performance, and carcass characteristics, as well as human health. Diseases are often transferred amongst pen-mates, but they can also originate from the environment and be spread by vectors or fomites. Pathogen carriage in the gastrointestinal tract of cattle often leads to direct or indirect contamination of foods and the feedlot environment. This leads to the recirculation of these pathogens that have fecal-oral transmission within a feedlot cattle population for an extended time. Salmonella, Shiga toxin-producing Escherichia coli, and Campylobacter are commonly associated with animal-derived foods and can be transferred to humans through several routes such as contact with infected cattle and the consumption of contaminated meat. Brucellosis, anthrax, and leptospirosis, significant but neglected zoonotic diseases with debilitating impacts on human and animal health, are also discussed.
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4
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Abd-El Wahab A, Basiouni S, El-Seedi HR, Ahmed MFE, Bielke LR, Hargis B, Tellez-Isaias G, Eisenreich W, Lehnherr H, Kittler S, Shehata AA, Visscher C. An overview of the use of bacteriophages in the poultry industry: Successes, challenges, and possibilities for overcoming breakdowns. Front Microbiol 2023; 14:1136638. [PMID: 37025628 PMCID: PMC10071031 DOI: 10.3389/fmicb.2023.1136638] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 02/28/2023] [Indexed: 04/08/2023] Open
Abstract
The primary contaminants in poultry are Salmonella enterica, Campylobacter jejuni, Escherichia coli, and Staphylococcus aureus. Their pathogenicity together with the widespread of these bacteria, contributes to many economic losses and poses a threat to public health. With the increasing prevalence of bacterial pathogens being resistant to most conventional antibiotics, scientists have rekindled interest in using bacteriophages as antimicrobial agents. Bacteriophage treatments have also been investigated as an alternative to antibiotics in the poultry industry. Bacteriophages' high specificity may allow them only to target a specific bacterial pathogen in the infected animal. However, a tailor-made sophisticated cocktail of different bacteriophages could broaden their antibacterial activity in typical situations with multiple clinical strains infections. Bacteriophages may not only be used in terms of reducing bacterial contamination in animals but also, under industrial conditions, they can be used as safe disinfectants to reduce contamination on food-contact surfaces or poultry carcasses. Nevertheless, bacteriophage therapies have not been developed sufficiently for widespread use. Problems with resistance, safety, specificity, and long-term stability must be addressed in particular. This review highlights the benefits, challenges, and current limitations of bacteriophage applications in the poultry industry.
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Affiliation(s)
- Amr Abd-El Wahab
- Institute for Animal Nutrition, University of Veterinary Medicine Hannover Foundation, Hannover, Germany
- Department of Nutrition and Nutritional Deficiency Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Shereen Basiouni
- Cilia Cell Biology, Institute of Molecular Physiology, Johannes-Gutenberg University, Mainz, Germany
- Clinical Pathology Department, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, Egypt
| | - Hesham R. El-Seedi
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang, China
- International Joint Research Laboratory of Intelligent Agriculture and Agri-Products Processing, Jiangsu Education Department, Jiangsu University, Nanjing, China
- Department of Chemistry, Faculty of Science, Menoufia University, Shebeen El-Kom, Egypt
| | - Marwa F. E. Ahmed
- Department of Hygiene and Zoonoses, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Lisa R. Bielke
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Billy Hargis
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
| | - Guillermo Tellez-Isaias
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
| | - Wolfgang Eisenreich
- Structural Membrane Biochemistry, Bavarian NMR Center, Technical University of Munich (TUM), Garching, Germany
| | - Hansjörg Lehnherr
- PTC Phage Technology Center GmbH, a Part of Finktec Group, Bönen, Germany
| | - Sophie Kittler
- Institute for Food Quality and Food Safety, University of Veterinary Medicine Hannover Foundation, Hannover, Germany
| | - Awad A. Shehata
- Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Egypt
- Research and Development Section, PerNaturam GmbH, An der Trift, Gödenroth, Germany
- Prophy-Institute for Applied Prophylaxis, Bönen, Germany
- *Correspondence: Awad A. Shehata,
| | - Christian Visscher
- Institute for Animal Nutrition, University of Veterinary Medicine Hannover Foundation, Hannover, Germany
- Christian Visscher,
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5
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Zhang Z, Wang J, Hu Y, Wang L. Microwaves, a potential treatment for bacteria: A review. Front Microbiol 2022; 13:888266. [PMID: 35958124 PMCID: PMC9358438 DOI: 10.3389/fmicb.2022.888266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/05/2022] [Indexed: 02/03/2023] Open
Abstract
Bacteria have brought great harm to the public, especially after the emergence of multidrug-resistant bacteria. This has rendered traditional antibiotic therapy ineffective. In recent years, hyperthermia has offered new treatments to remove bacteria. Microwaves (MW) are a component of the electromagnetic spectrum and can rapidly heat materials. Taking advantage of this characteristic of MW, related studies have shown that both thermal and non-thermal effects of MW can inactivate various bacteria. Even though the understanding of MW in the field of bacteria is not sufficient for widespread use at present, MW has performed well in dealing with microorganisms and controlling infection. This review will focus on the application of MW in bacteria and discuss the advantages, prospects and challenges of using MW in the bacterial field.
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Affiliation(s)
- Zhen Zhang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
| | - Jiahao Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
| | - Yihe Hu
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- Department of Orthopedics, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Long Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Long Wang,
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6
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Mazkour S, Shekarforoush SS, Basiri S, Namazi F, Zarei‐Kordshouli F. Protective effects of oral administration of mixed probiotic spores of
Bacillus subtilis
and
Bacillus coagulans
on gut microbiota changes and intestinal and liver damage of rats infected with
Salmonella
Typhimurium
. J Food Saf 2022. [DOI: 10.1111/jfs.12981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Somaye Mazkour
- Department of Food Hygiene and Public Health School of Veterinary Medicine, Shiraz University Shiraz Iran
| | | | - Sara Basiri
- Department of Food Hygiene and Public Health School of Veterinary Medicine, Shiraz University Shiraz Iran
| | - Fatemeh Namazi
- Department of Pathology School of Veterinary Medicine, Shiraz University Shiraz Iran
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Gharib MH, Alebbi S, Rashid F, Elhaj MF, Zahirb FZ, AL Emadi S. Salmonella-Related Septic Arthritis in an Immunocompetent Adult: A Case Report. Cureus 2022; 14:e21030. [PMID: 35028243 PMCID: PMC8744364 DOI: 10.7759/cureus.21030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2022] [Indexed: 11/05/2022] Open
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8
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Koyun OY, Callaway TR, Nisbet DJ, Anderson RC. Innovative Treatments Enhancing the Functionality of Gut Microbiota to Improve Quality and Microbiological Safety of Foods of Animal Origin. Annu Rev Food Sci Technol 2022; 13:433-461. [DOI: 10.1146/annurev-food-100121-050244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The gastrointestinal tract, or gut, microbiota is a microbial community containing a variety of microorganisms colonizing throughout the gut that plays a crucial role in animal health, growth performance, and welfare. The gut microbiota is closely associated with the quality and microbiological safety of foods and food products originating from animals. The gut microbiota of the host can be modulated and enhanced in ways that improve the quality and safety of foods of animal origin. Probiotics—also known as direct-fed microbials—competitive exclusion cultures, prebiotics, and synbiotics have been utilized to achieve this goal. Reducing foodborne pathogen colonization in the gut prior to slaughter and enhancing the chemical, nutritional, or sensory characteristics of foods (e.g., meat, milk, and eggs) are two of many positive outcomes derived from the use of these competitive enhancement–based treatments in food-producing animals. Expected final online publication date for the Annual Review of Food Science and Technology, Volume 13 is March 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Osman Y. Koyun
- Department of Animal and Dairy Science, University of Georgia, Athens, Georgia, USA
| | - Todd R. Callaway
- Department of Animal and Dairy Science, University of Georgia, Athens, Georgia, USA
| | - David J. Nisbet
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, College Station, Texas, USA
| | - Robin C. Anderson
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, College Station, Texas, USA
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9
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Elbediwi M, Tang Y, Shi D, Ramadan H, Xu Y, Xu S, Li Y, Yue M. Genomic Investigation of Antimicrobial-Resistant Salmonella enterica Isolates From Dead Chick Embryos in China. Front Microbiol 2021; 12:684400. [PMID: 34497590 PMCID: PMC8419455 DOI: 10.3389/fmicb.2021.684400] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 06/14/2021] [Indexed: 12/13/2022] Open
Abstract
Salmonella spp. is recognized as an important zoonotic pathogen. The emergence of antimicrobial resistance in Salmonella enterica poses a great public health concern worldwide. While the knowledge on the incidence and the characterization of different S. enterica serovars causing chick embryo death remains obscure in China. In this study, we obtained 45 S. enterica isolates from 2,139 dead chick embryo samples collected from 28 breeding chicken hatcheries in Henan province. The antimicrobial susceptibility assay was performed by the broth microdilution method and the results showed that 31/45 (68.8%) isolates were multidrug-resistant (≥3 antimicrobial classes). Besides the highest resistance rate was observed in the aminoglycoside class, all the isolates were susceptible to chloramphenicol, azithromycin, and imipenem. Furthermore, genomic characterization revealed that S. Enteritidis (33.33%; 15/45) was a frequent serovar that harbored a higher number of virulence factors compared to other serovars. Importantly, genes encoding β-lactamases were identified in three serovars (Thompson, Enteritidis, and Kottbus), whereas plasmid-mediated quinolone resistance genes (qnrB4) were detected in certain isolates of S. Thompson and the two S. Kottbus isolates. All the examined isolates harbored the typical virulence factors from Salmonella pathogenicity islands 1 and 2 (SPI-1 and SPI-2). Additionally, a correlation analysis between the antimicrobial resistance genes, phenotype, and plasmids was conducted among Salmonella isolates. It showed strong positive correlations (r < 0.6) between the different antimicrobial-resistant genes belonging to certain antimicrobial classes. Besides, IncF plasmid showed a strong negative correlation (r > −0.6) with IncHI2 and IncHI2A plasmids. Together, our study demonstrated antimicrobial-resistant S. enterica circulating in breeding chicken hatcheries in Henan province, highlighting the advanced approach, by using genomic characterization and statistical analysis, in conducting the routine monitoring of the emerging antimicrobial-resistant pathogens. Our findings also proposed that the day-old breeder chicks trading could be one of the potential pathways for the dissemination of multidrug-resistant S. enterica serovars.
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Affiliation(s)
- Mohammed Elbediwi
- Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences, Hangzhou, China
| | - Yanting Tang
- Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences, Hangzhou, China
| | - Dawei Shi
- National Institutes for Food and Drug Control, Beijing, China
| | - Hazem Ramadan
- Hygiene and Zoonoses Department, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.,Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States National Poultry Research Center, United States Department of Agriculture, Agricultural Research Service (USDA-ARS), Athens, GA, United States
| | - Yaohui Xu
- College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou, China
| | - Sihong Xu
- National Institutes for Food and Drug Control, Beijing, China
| | - Yan Li
- Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences, Hangzhou, China.,Hainan Institute of Zhejiang University, Sanya, China.,Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou, China
| | - Min Yue
- Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences, Hangzhou, China.,Hainan Institute of Zhejiang University, Sanya, China.,Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou, China.,State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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10
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Elbediwi M, Shi D, Biswas S, Xu X, Yue M. Changing Patterns of Salmonella enterica Serovar Rissen From Humans, Food Animals, and Animal-Derived Foods in China, 1995-2019. Front Microbiol 2021; 12:702909. [PMID: 34394048 PMCID: PMC8358327 DOI: 10.3389/fmicb.2021.702909] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/25/2021] [Indexed: 12/04/2022] Open
Abstract
Salmonellosis represents a growing threat to global public health. Salmonella enterica remains the leading cause of bacterial foodborne diseases in China. Salmonella enterica serovar Rissen (S. Rissen) has been recognized as one of the emerging serovars among humans in different countries worldwide. However, knowledge on the prevalence of S. Rissen in China is largely lacking. To address essential epidemiological information for S. Rissen in China, a total of 1,182 S. Rissen isolates recovered from samples across the food chain were collected from 16 provinces or province-level cities between 1995 and 2019. Risk factors due to the consumption of animal-derived food products were also analyzed. We found S. Rissen is widely distributed, especially in the Eastern and Southern parts of China, and there is an increasing frequency in recent years as evidenced by the greater number of isolates recovered in 2016, 2017, and 2018. Interestingly, the majority of S. Rissen isolates recovered in this study were from human samples (63.4%; 749/1182), remarkably, 58.4% (438/749) were from asymptomatic carriers. We obtained most of the S. Rissen isolates from humans from Guangxi (59.5%; 446/749) and Shanghai (29.5%; 221/749). Among 302 human diarrheal isolates (40.3%; 302/749), we found 44.6% (139/311) of S. Rissen in children with diarrhea (age below 10 years old). This is of clinical significance as diarrhea is one of the crucial causes of child mortality globally and our findings here highlighted the importance of Salmonella infections in Chinese children. Additionally, S. Rissen isolates were also found to be associated with pork and poultry products in China. This study projected the most updated national-wide study of S. Rissen isolates obtained from different sources in China over the past two decades. Continued surveillance is warranted to further monitor this emerging serovar in China and elsewhere over the world.
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Affiliation(s)
- Mohammed Elbediwi
- Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences, Hangzhou, China.,Agriculture Research Center, Animal Health Research Institute, Cairo, Egypt
| | - Daiwei Shi
- National Institutes for Food and Drug Control, Beijing, China
| | - Silpak Biswas
- Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences, Hangzhou, China
| | - Xuebin Xu
- Department of Microbiology Laboratory, Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Min Yue
- Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences, Hangzhou, China.,Hainan Institute of Zhejiang University, Sanya, China.,State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou, China
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11
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Gado DA, Abdalla MA, Ahmed AS, Madikizela B, Nkadimeng SM, Ehlers MM, McGaw LJ. In vitro antibacterial activity of Loxostylis alata extracts and isolated compounds against Salmonella species. BMC Complement Med Ther 2021; 21:121. [PMID: 33849505 PMCID: PMC8042679 DOI: 10.1186/s12906-021-03292-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 03/29/2021] [Indexed: 01/21/2023] Open
Abstract
Background Owing to antibiotic resistance, alternative antimicrobials from medicinal plants are receiving attention as leads for anti-infective agents. This study aimed to investigate selected tree species and their constituents for activity against bacterial foodborne pathogens, particularly Salmonella serovars. Methods Antibacterial activity of ten plant species was determined by serial microdilution against bacteria implicated in causing gastrointestinal ailments. Active compounds were isolated from Loxostylis alata using bioassay-guided fractionation. Antioxidant activity was determined using free-radical scavenging assays. Cytotoxicity and genotoxicity of the extracts was ascertained on Vero cells, and using the Ames assay respectively. Results Extracts had low to moderate MIC values from 0.04 to 2.5 mg/mL. Protorhus longifolia and Loxostylis alata were most active and L. alata had the highest selectivity index value (2.51) against Salmonella Typhimurium, as well as high antioxidant activity. Cytotoxicity values ranged from 0.02 to 0.47 mg/mL, while tested extracts were not genotoxic. Bioactive compounds isolated from L. alata included delicaflavone and a polymethoxyflavone. Conclusions The Loxostylis alata leaf extract had strong activity against Salmonella serovars but isolated compounds were less active, indicating likely synergistic effects. Extracts of L. alata are promising candidates for development of antimicrobial preparations or food additives against microbial contamination.
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Affiliation(s)
- Dorcas A Gado
- Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Private Bag X04, Onderstepoort 0110, Pretoria, South Africa.,Regional Laboratory for Animal Influenzas and other Transboundary Animal Diseases, National Veterinary Research Institute, PMB 01, Vom, Plateau State, Nigeria
| | - Muna Ali Abdalla
- Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Private Bag X04, Onderstepoort 0110, Pretoria, South Africa. .,Department of Food Science and Technology, Faculty of Agriculture, University of Khartoum, 13314, Khartoum North, Sudan.
| | - Aroke S Ahmed
- Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Private Bag X04, Onderstepoort 0110, Pretoria, South Africa
| | - Balungile Madikizela
- Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Private Bag X04, Onderstepoort 0110, Pretoria, South Africa
| | - Sanah M Nkadimeng
- Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Private Bag X04, Onderstepoort 0110, Pretoria, South Africa
| | - Marthie M Ehlers
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, PO Box X323, Arcadia 0007, Pretoria, South Africa.,National Health Laboratory Service, Tshwane Academic Division, Pretoria, South Africa
| | - Lyndy J McGaw
- Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Private Bag X04, Onderstepoort 0110, Pretoria, South Africa
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12
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Khochamit N, Siripornadulsil S, Sukon P, Siripornadulsil W. Bacillus subtilis and lactic acid bacteria improve the growth performance and blood parameters and reduce Salmonella infection in broilers. Vet World 2020; 13:2663-2672. [PMID: 33487985 PMCID: PMC7811549 DOI: 10.14202/vetworld.2020.2663-2672] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 11/02/2020] [Indexed: 11/16/2022] Open
Abstract
Aim The aim of the study was to determine the potentials and effects of Bacillus subtilis and lactic acid bacteria (LAB) as probiotics on broiler growth, health, and Salmonella infection. Materials and Methods To evaluate the inoculum size applicable for broilers, 1-day-old broilers were orally fed fresh cultures of single strains and a B. subtilis KKU213/Pediococcus pentosaceus NP6 mixture at 108 and 1012 colony-forming unit (CFUs)/mL/chick. The body weight gain (BWG), Salmonella contamination level and total Bacillus and LAB abundances in the crop and intestine were measured. Subsequently, 1-day-old broilers were orally fed of KKU213, CH403, and Pediococcus acidilactici SH8 at 1010 CFUs/mL, followed by inulin. After 35 days, the BWG, Bacillus and LAB abundances in the cecum, blood parameters, and KKU213 colonization were assessed. Results The broilers fed single strains or KKU213+NP6 exhibited a higher BWG and a higher crop LAB abundance than the controls (p<0.05). Probiotic feeding decreased the intestinal Salmonella abundance and correspondingly increased the LAB abundance. The broilers fed the mixed culture (KKU213+CH403+SH8) followed by prebiotics showed lower mortality, higher blood high-density lipoprotein levels, and lower blood uric acid levels than the controls (p<0.0004). Probiotic feeding significantly increased the Bacillus and LAB counts (p<0.05). A CE330 isolate obtained from the cecum after 35 days of KKU213 feeding was closely related to B. subtilis KKU213. Conclusion B. subtilis KKU213 is a potent probiotic strain that can survive, colonize and reduce Salmonella infection in broilers and improve their growth and health. This strain, combined with different LAB can act synergistically in the gut and promote broiler growth.
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Affiliation(s)
- Nalisa Khochamit
- Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Surasak Siripornadulsil
- Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.,Research Center for Environmental and Hazardous Substance Management, Khon Kaen University, Khon Kaen 40002, Thailand.,Center of Excellence on Hazardous Substance Management (HSM), Patumwan, Bangkok, 10330 Thailand
| | - Peerapol Sukon
- Research Group for Preventive Technology in Livestock, Department of Anatomy, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wilailak Siripornadulsil
- Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.,Research Center for Environmental and Hazardous Substance Management, Khon Kaen University, Khon Kaen 40002, Thailand.,Center of Excellence on Hazardous Substance Management (HSM), Patumwan, Bangkok, 10330 Thailand
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13
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Xu X, Biswas S, Gu G, Elbediwi M, Li Y, Yue M. Characterization of Multidrug Resistance Patterns of Emerging Salmonella enterica Serovar Rissen along the Food Chain in China. Antibiotics (Basel) 2020; 9:antibiotics9100660. [PMID: 33007986 PMCID: PMC7600917 DOI: 10.3390/antibiotics9100660] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/24/2020] [Accepted: 09/28/2020] [Indexed: 11/25/2022] Open
Abstract
Salmonella spp. are recognized as important foodborne pathogens globally. Salmonella enterica serovar Rissen is one of the important Salmonella serovars linked with swine products in numerous countries and can transmit to humans by food chain contamination. Worldwide emerging S. Rissen is considered as one of the most common pathogens to cause human salmonellosis. The objective of this study was to determine the antimicrobial resistance properties and patterns of Salmonella Rissen isolates obtained from humans, animals, animal-derived food products, and the environment in China. Between 2016 and 2019, a total of 311 S. Rissen isolates from different provinces or province-level cities in China were included here. Bacterial isolates were characterized by serotyping and antimicrobial susceptibility testing. Minimum inhibitory concentration (MIC) values of 14 clinically relevant antimicrobials were obtained by broth microdilution method. S. Rissen isolates from humans were found dominant (67%; 208/311). S. Rissen isolates obtained from human patients were mostly found with diarrhea. Other S. Rissen isolates were acquired from food (22%; 69/311), animals (8%; 25/311), and the environment (3%; 9/311). Most of the isolates were resistant to tetracycline, trimethoprim-sulfamethoxazole, chloramphenicol, streptomycin, sulfisoxazole, and ampicillin. The S. Rissen isolates showed susceptibility against ceftriaxone, ceftiofur, gentamicin, nalidixic acid, ciprofloxacin, and azithromycin. In total, 92% of the S. Rissen isolates were multidrug-resistant and ASSuT (27%), ACT (25%), ACSSuT (22%), ACSSuTAmc (11%), and ACSSuTFox (7%) patterns were among the most prevalent antibiotic resistance patterns found in this study. The widespread dissemination of antimicrobial resistance could have emerged from misuse of antimicrobial agents in animal husbandry in China. These findings could be useful for rational antimicrobial usage against Salmonella Rissen infections.
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Affiliation(s)
- Xuebin Xu
- Department of Microbiology Laboratory, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China;
| | - Silpak Biswas
- Institute of Veterinary Sciences & Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; (S.B.); (M.E.); (Y.L.)
| | - Guimin Gu
- Guangxi Institute for Product Quality Inspection, Nanning 530007, China;
| | - Mohammed Elbediwi
- Institute of Veterinary Sciences & Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; (S.B.); (M.E.); (Y.L.)
- Animal Health Research Institute, Agriculture Research Centre, Cairo 11435, Egypt
| | - Yan Li
- Institute of Veterinary Sciences & Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; (S.B.); (M.E.); (Y.L.)
- Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou 310058, China
| | - Min Yue
- Institute of Veterinary Sciences & Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; (S.B.); (M.E.); (Y.L.)
- Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou 310058, China
- Correspondence: ; Tel./Fax: +86-0571-8898-2832
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14
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Ramlucken U, Roets Y, Ramchuran SO, Moonsamy G, van Rensburg CJ, Thantsha MS, Lalloo R. Isolation, selection and evaluation of Bacillus spp. as potential multi-mode probiotics for poultry. J GEN APPL MICROBIOL 2020; 66:228-238. [PMID: 32536637 DOI: 10.2323/jgam.2019.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Bacillus based probiotics are becoming relevant as alternatives to antibiotics used in poultry production and in other animal husbandry. This study describes the isolation of 48 Bacillus spp. candidates, from chickens and chicken environments, for use as potential probiotics in poultry production. These isolates, plus a further 18, were tested in a comprehensive in vitro screening regime that was specifically designed to select the best isolates that satisfied multiple modes of action desirable for commercial poultry probiotics. This screening programme involved the evaluation of the ability of the isolates to survive and grow in the limiting conditions of the chicken gastrointestinal tract. Only 11 of the isolates fulfilled these criteria; hence, they were further evaluated for the ability to adhere to epithelial cells, produce extracellular enzymes, and to demonstrate antagonistic activity against selected pathogens of significant importance in poultry production. Of these, a total of 6 isolates were selected, due to their all-round probiotic capability. Identification by 16S RNA sequencing confirmed these isolates as B. subtilis and B. velezensis, identities which are generally regarded as safe. The Bacillus isolates reported in our study exhibit strong all-inclusive probiotic effects and can potentially be formulated as a probiotic preparation for poultry production.
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Affiliation(s)
- Uraisha Ramlucken
- The Council for Scientific and Industrial Research.,University of Pretoria
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15
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Antibacterial and antibiofilm activities of diphyllin against fish pathogens. Microb Pathog 2020; 145:104232. [PMID: 32353578 DOI: 10.1016/j.micpath.2020.104232] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 03/02/2020] [Accepted: 04/23/2020] [Indexed: 11/24/2022]
Abstract
Annihilation of biofilm forming bacterial pathogens is a challenging aspect in seafood and aquaculture industries. Microbes growing as biofilms cause deleterious effects on food products leading to food spoilage or loss of shelf life. As a measure to fight biofilms, agents that prevent/disrupt biofilms are recurrently screened. The study exemplifies the bactericidal and biofilm disruption potentials of a plant derived compound, diphyllin, against fish pathogens that colonizes Oreochromis mossambicus and Oreochromis niloticus. Precisely, diphyllin disrupted Salmonella typhi biofilms by triggering reactive oxidative species (ROS). Diphyllin-induced ROS had satisfactory correlation with S. typhi cell membrane damage and intracellular DNA degradation profiles providing a putative mechanistic model. In conclusion, the study identifies diphyllin as a therapeutic and dispersal agent aimed at biofilms formed by food-borne pathogens that persistently plague food processing and aquaculture settings.
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16
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Shanmugasundaram R, Mortada M, Murugesan GR, Selvaraj RK. In vitro characterization and analysis of probiotic species in the chicken intestine by real-time polymerase chain reaction. Poult Sci 2020; 98:5840-5846. [PMID: 30982074 DOI: 10.3382/ps/pez188] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 03/27/2019] [Indexed: 12/24/2022] Open
Abstract
Two experiments, 1 in vitro and 1 in vivo study, were conducted to analyze probiotic species characteristics and survival in the intestine of broiler birds. The in vitro study characterized the effect of bile salt supplementation and pH on the proliferation of Lactobacillus reuteri, Pediococcus acidilactici, Bifidobacterium animalis, and Enterococcus faecium. L. reuteri and P. acidilactici growth was maximal when the media was supplemented with 1.0% bile salt, whereas B. animalis and E. faecium growth was maximal when the media was supplemented with 0.5% bile salt. Altering the pH between 2.5 and 5.8 did not significantly (P > 0.05) alter the proliferation of L. reuteri and B. animalis. Decreasing the pH from 5.8 to 2.0 decreased P. acidilactici growth, whereas it increased the E. faecium proliferation. The in vivo study quantified the concentration of L. reuteri, P. acidilactici, B. animalis, E. faecium, and L. salivarius in different intestinal sections from birds supplemented with and without synbiotic containing the above 5 bacteria species. Birds were supplemented with and without synbiotic for 18 d, after which all birds were fed the same basal diet with no synbiotic. At 72 h of feeding, the basal diet with no synbiotics, when the probiotic species in the feed is expected not to confound the recovery of probiotic species from the intestine, intestinal contents were collected. L. reuteri, P. acidilactici, E. faecium, and L. salivarius were below detectable amount in the control group. L. reuteri concentration expressed as copy numbers/g and as percentage of total bacteria was highest in the jejunum and ileum, respectively. E. faecium concentration was highest in the ileum. The copy number of P. acidilactici increased at the duodenum and plateaued after duodenum. L. salivarius concentration was highest in the jejunum. It can be concluded that real-time PCR can be applied to quantify the concentrations of probiotic species in the intestine and probiotic species differ in their ability to colonize different sections of the intestine.
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Affiliation(s)
- Revathi Shanmugasundaram
- Department of Animal Sciences, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, OH 44691, USA.,BIOMIN America Inc., Overland Park, KS 66210, USA
| | - Mohamad Mortada
- Department of Poultry Sciences, University of Georgia, Athens, GA, 30602, USA
| | | | - Ramesh K Selvaraj
- Department of Poultry Sciences, University of Georgia, Athens, GA, 30602, USA
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17
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Kumar A, Ellermann M, Sperandio V. Taming the Beast: Interplay between Gut Small Molecules and Enteric Pathogens. Infect Immun 2019; 87:IAI.00131-19. [PMID: 31262983 PMCID: PMC6704596 DOI: 10.1128/iai.00131-19] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The overuse of antibiotics has led to the evolution of drug-resistant bacteria that are becoming increasingly dangerous to human health. According to the Centers for Disease Control and Prevention, antibiotic-resistant bacteria cause at least 2 million illnesses and 23,000 deaths in the United States annually. Traditionally, antibiotics are bactericidal or bacteriostatic agents that place selective pressure on bacteria, leading to the expansion of antibiotic-resistant strains. In addition, antibiotics that are effective against some pathogens can also exacerbate their pathogenesis and may lead to severe progression of the disease. Therefore, alternative strategies are needed to treat antibiotic-resistant bacterial infections. One novel approach is to target bacterial virulence to prevent or limit pathogen colonization, while also minimizing tissue damage and disease comorbidities in the host. This review focuses on the interactions between enteric pathogens and naturally occurring small molecules in the human gut as potential therapeutic targets for antivirulence strategies. Individual small molecules in the intestines modulate enteric pathogen virulence and subsequent intestinal fitness and colonization. Targeted interruption of pathogen sensing of these small molecules could therefore attenuate their virulence. This review highlights the paths of discovery for new classes of antimicrobials that could potentially mitigate the urgent problem of antibiotic resistance.
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Affiliation(s)
- Aman Kumar
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Melissa Ellermann
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Vanessa Sperandio
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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18
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Soni N, Swain SK, Kant R, Singh A, Ravichandran R, Verma SK, Panda PK, Suar M. Landscape of ROD9 Island: Functional annotations and biological network of hypothetical proteins in Salmonella enterica. Comput Biol Chem 2019; 83:107110. [PMID: 31445418 DOI: 10.1016/j.compbiolchem.2019.107110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 07/16/2019] [Accepted: 08/13/2019] [Indexed: 01/01/2023]
Abstract
Salmonella, an Enterobacteria is a therapeutically important pathogen for the host. The advancement of genome sequencing of S. enterica serovar Enteritidis have identified a distinct ROD9 pathogenic island, imparting virulence. The occurrence of 17 ROD9 hypothetical proteins, necessitates subsequent bioinformatics approach for structural and functional aspects of protein-protein relations or networks in different pathogenic phenotypes express. A collective analysis using predictive bioinformatics tools that includes NCBI-BLASTp and BLAST2GO annotated the motif patterns and functional significance. The VFDB identified 10 virulence proteins at both genomic and metagenomic level. Phylogenetic analysis revealed a divergent and convergent relationship between 17 ROD9 and 41 SP-1 proteins. Here, combining a comprehensive approach from sequence based, motif recognitions, domain identification, virulence ability to structural modelling provides a precise function to ROD9 proteins biological network, for which no experimental information is available.
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Affiliation(s)
- Nikita Soni
- School of Biotechnology and Bioinformatics, D. Y. Patil (Deemed to be University), Navi Mumbai, India
| | | | - Ravi Kant
- University of Delhi, New Delhi, India
| | - Aditya Singh
- School of Biotechnology and Bioinformatics, D. Y. Patil (Deemed to be University), Navi Mumbai, India
| | - Rahul Ravichandran
- School of Chemical and Biotechnology, SASTRA University, Tamil Nadu, India
| | - Suresh K Verma
- Institute of Environmental Medicine (IMM), C6, Molecular Toxicology, Karolinska Institutet, Sweden
| | - Pritam Kumar Panda
- Division of Pediatric Hematology and Oncology, University Medical Center, University of Freiburg, Germany.
| | - Mrutyunjay Suar
- School of Biotechnology, KIIT University, Bhubaneswar, India.
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19
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Bellido-Carreras N, Argüello H, Zaldívar-López S, Jiménez-Marín Á, Martins RP, Arce C, Morera L, Carvajal A, Garrido JJ. Salmonella Typhimurium Infection Along the Porcine Gastrointestinal Tract and Associated Lymphoid Tissues. Vet Pathol 2019; 56:681-690. [PMID: 31106677 DOI: 10.1177/0300985819843682] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Salmonella is a major foodborne pathogen and pork is one of the main sources of human salmonellosis. Understanding the pathogenesis and progression of the infection within the host is of interest to establish potential approaches to control the disease in pigs. The present study evaluates factors such as intestinal colonization, fecal shedding, and pathogen persistence by 2 studies using experimental challenge with Salmonella Typhimurium in weaned pigs and euthanasia at different time points (1, 2, and 6 and 2, 14, and 30 days postinfection [dpi], respectively). Histopathology of intestine at early time points (1 dpi and 2 dpi) showed severe damage to the epithelium together with an increase in polymorphonuclear cells and macrophages (P < .001), particularly in jejunum and ileum. Large quantities of Salmonella were detected within the contents of the ileum, cecum, and colon in early infection. Salmonella could also be observed in the medulla of tonsils and mesenteric lymph nodes. From 6 dpi onward, signs of recovery were observed, with progressive restoration of the epithelium, reduction of the inflammatory infiltrate, and elimination of Salmonella from the mucosa. Concentration of Salmonella in feces and ileum content decreased, but shedding did not cease even at 4 weeks after infection. Persistence of the bacteria in mesenteric lymph nodes was identified within the connective tissue at 14 and 30 dpi. Our results demonstrate a recovery of the disease after an initial acute phase but also show persistence within the lumen and surrounding lymphoid tissue. These findings are relevant to developing effective control strategies.
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Affiliation(s)
- Natividad Bellido-Carreras
- 1 Departamento de Genética, Facultad de Veterinaria, Grupo de Genómica y Mejora Animal, Universidad de Córdoba, Córdoba, Spain
| | - Héctor Argüello
- 1 Departamento de Genética, Facultad de Veterinaria, Grupo de Genómica y Mejora Animal, Universidad de Córdoba, Córdoba, Spain
| | - Sara Zaldívar-López
- 1 Departamento de Genética, Facultad de Veterinaria, Grupo de Genómica y Mejora Animal, Universidad de Córdoba, Córdoba, Spain
| | - Ángeles Jiménez-Marín
- 1 Departamento de Genética, Facultad de Veterinaria, Grupo de Genómica y Mejora Animal, Universidad de Córdoba, Córdoba, Spain
| | - Rodrigo P Martins
- 1 Departamento de Genética, Facultad de Veterinaria, Grupo de Genómica y Mejora Animal, Universidad de Córdoba, Córdoba, Spain.,2 Cibles Thérapeutiques, Institut National de la Santé et de la Recherche Médicale UMR1162, Institut de Génétique Moléculaire, Louis, Paris, France
| | - Cristina Arce
- 3 Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Córdoba, Córdoba, Spain
| | - Luis Morera
- 1 Departamento de Genética, Facultad de Veterinaria, Grupo de Genómica y Mejora Animal, Universidad de Córdoba, Córdoba, Spain
| | - Ana Carvajal
- 4 Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, León, Spain
| | - Juan J Garrido
- 1 Departamento de Genética, Facultad de Veterinaria, Grupo de Genómica y Mejora Animal, Universidad de Córdoba, Córdoba, Spain
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Lipid Droplets: A Significant but Understudied Contributor of Host⁻Bacterial Interactions. Cells 2019; 8:cells8040354. [PMID: 30991653 PMCID: PMC6523240 DOI: 10.3390/cells8040354] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/05/2019] [Accepted: 04/12/2019] [Indexed: 12/13/2022] Open
Abstract
Lipid droplets (LDs) are cytosolic lipid storage organelles that are important for cellular lipid metabolism, energy homeostasis, cell signaling, and inflammation. Several bacterial, viral and protozoal pathogens exploit host LDs to promote infection, thus emphasizing the importance of LDs at the host–pathogen interface. In this review, we discuss the thus far reported relation between host LDs and bacterial pathogens including obligate and facultative intracellular bacteria, and extracellular bacteria. Although there is less evidence for a LD–extracellular bacterial interaction compared to interactions with intracellular bacteria, in this review, we attempt to compare the bacterial mechanisms that target LDs, the host signaling pathways involved and the utilization of LDs by these bacteria. Many intracellular bacteria employ unique mechanisms to target host LDs and potentially obtain nutrients and lipids for vacuolar biogenesis and/or immune evasion. However, extracellular bacteria utilize LDs to either promote host tissue damage or induce host death. We also identify several areas that require further investigation. Along with identifying LD interactions with bacteria besides the ones reported, the precise mechanisms of LD targeting and how LDs benefit pathogens should be explored for the bacteria discussed in the review. Elucidating LD–bacterial interactions promises critical insight into a novel host–pathogen interaction.
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21
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Hossain S, De Silva B, Dahanayake P, Shin GW, Heo GJ. MOLECULAR CHARACTERIZATION OF VIRULENCE, ANTIMICROBIAL RESISTANCE GENES, AND CLASS ONE INTEGRON GENE CASSETTES IN SALMONELLA ENTERICA SUBSP. ENTERICA ISOLATED FROM PET TURTLES IN SEOUL, KOREA. J Exot Pet Med 2019. [DOI: 10.1053/j.jepm.2018.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Okamoto AS, Filho RLA, Milbradt EL, Moraes ACI, Vellano IHB, Guimarães-Okamoto PTC. Bacterial communication between Lactobacillus spp. isolated from poultry in the inhibition of Salmonella Heidelberg—proof of concept. Poult Sci 2018; 97:2708-2712. [DOI: 10.3382/ps/pey141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 03/21/2018] [Indexed: 01/01/2023] Open
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23
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Unlu O, Aktas Z, Tugrul HM. Analysis of Virulence Factors and Antimicrobial Resistance in Salmonella Using Molecular Techniques and Identification of Clonal Relationships Among the Strains. Microb Drug Resist 2018; 24:1475-1482. [PMID: 29920160 DOI: 10.1089/mdr.2018.0042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A total of 50 Salmonella enterica strains were isolated from clinical samples from 2009 to 2012 and analyzed for the presence of virulence genes found in SPI-1, SPI-2, and plasmids. The distribution and frequency of the antimicrobial resistance genes and plasmids were revealed, and pulsed-field gel electrophoresis (PFGE) patterns were investigated. Five genes were identified from the seven strains with resistance or intermediate resistance to ampicillin: blaSHV-1 (present in six strains), qnrS1 (present in five strains), blaTEM-1 (present in three strains), blaCTX-M-1 (present in one strain), and qnrB1 (present in one strain). One trimethoprim-sulfamethoxazole-resistant strain was positive for sulI but negative for sulII. In addition, we detected TEM-1 and qnrS1 in one strain; SHV-1 and qnrS1 in two strains; TEM-1, SHV-1, CTX-M-1, and qnrS1 in one strain; TEM-1, SHV-1, and qnrB1 in one strain; and SHV-1 and sulI genes in one strain together. Plasmid-based replicon typing assay revealed that all 50 strains carried FIIS, 13 carried I1, 1 carried I2, 4 carried P, 1 carried A/C, and 4 carried X1 replicon. PFGE was used to type 46 of the 50 strains and classify them into 22 major groups, 33 pulsotypes, and 8 major clusters. All strains carried all the virulence genes of interest on both Salmonella Pathogenicity Islands 1 and 2 and plasmids suggested high potential for pathogenicity. All antimicrobial-resistant strains contained at least one of the resistance genes of interest, confirming a phenotype-genotype association in antimicrobial resistance.
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Affiliation(s)
- Ozge Unlu
- Department of Medical Microbiology, Faculty of Medicine, Beykent University, Istanbul, Turkey
| | - Zerrin Aktas
- Department of Medical Microbiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Hamdi Murat Tugrul
- Department of Medical Microbiology, Faculty of Medicine, Trakya University, Edirne, Turkey
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24
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Mokracka J, Krzymińska S, Ałtunin D, Wasyl D, Koczura R, Dudek K, Dudek M, Chyleńska ZA, Ekner-Grzyb A. In vitro virulence characteristics of rare serovars of Salmonella enterica isolated from sand lizards (Lacerta agilis L.). Antonie van Leeuwenhoek 2018; 111:1863-1870. [PMID: 29779148 PMCID: PMC6153992 DOI: 10.1007/s10482-018-1079-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/31/2018] [Indexed: 01/24/2023]
Abstract
The aim of this study was to estimate virulence potential of Salmonella enterica strains colonizing the gut of free-living sand lizards (Lacerta agilis L.). The strains belonged to three Salmonella serovars: Abony, Schleissheim, and Telhashomer. Adhesion and invasion abilities of the strains were determined in quantitative assays using the gentamicin protection method. Induction of apoptosis was assessed using HeLa cell monolayers. PCR assays were used for detection of 26 virulence genes localised within mobile elements: pathogenicity islands, virulence plasmids, and prophage sequences. In vitro studies revealed that all strains had adhesion and invasion abilities to human epithelial cells. The isolates were cytotoxic and induced apoptosis of the cells. The serovars differed in the number of virulence-associated genes: up to 18 genes were present in Salmonella Schleissheim, 17 in Salmonella Abony, whereas as few as six genes were found in Salmonella Telhashomer. Generally, Salmonella Abony and Salmonella Schleissheim did not differ much in gene content connected with the presence SPI-1 to -5. All of the strains lacked genes localised within bacteriophages and plasmids. The presence of virulence-associated genes and in vitro pathogenicity assays suggest that Salmonella sp. strains originating from autochthonous, free-living lizards can potentially infect and cause disease in humans.
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Affiliation(s)
- Joanna Mokracka
- Department of Microbiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614, Poznan, Poland.
| | - Sylwia Krzymińska
- Department of Microbiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614, Poznan, Poland
| | - Danił Ałtunin
- Department of Microbiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614, Poznan, Poland
| | - Dariusz Wasyl
- Department of Microbiology, National Veterinary Research Institute, Partyzantów 57, 24-100, Puławy, Poland
| | - Ryszard Koczura
- Department of Microbiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614, Poznan, Poland
| | - Krzysztof Dudek
- Department of Zoology, Institute of Zoology, Poznań University of Life Sciences, Wojska Polskiego 71 C, 60-625, Poznan, Poland
- HiProMine S.A., ul. Poznańska 8, 62-023, Robakowo, Poland
| | - Monika Dudek
- Laboratory of Neurobiology, Institute of Zoology, Poznań University of Life Sciences, Wojska Polskiego 71 C, 60-625, Poznan, Poland
| | - Zofia Anna Chyleńska
- Department of Nature Education and Conservation, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614, Poznan, Poland
| | - Anna Ekner-Grzyb
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614, Poznan, Poland
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25
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Yin Y, Zhou D. Organoid and Enteroid Modeling of Salmonella Infection. Front Cell Infect Microbiol 2018; 8:102. [PMID: 29670862 PMCID: PMC5894114 DOI: 10.3389/fcimb.2018.00102] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 03/16/2018] [Indexed: 12/12/2022] Open
Abstract
Salmonella are Gram-negative rod-shaped facultative anaerobic bacteria that are comprised of over 2,000 serovars. They cause gastroenteritis (salmonellosis) with headache, abdominal pain and diarrhea clinical symptoms. Salmonellosis brings a heavy burden for the public health in both developing and developed countries. Antibiotics are usually effective in treating the infected patients with severe gastroenteritis, although antibiotic resistance is on the rise. Understanding the molecular mechanisms of Salmonella infection is vital to combat the disease. In vitro immortalized 2-D cell lines, ex vivo tissues/organs and several animal models have been successfully utilized to study Salmonella infections. Although these infection models have contributed to uncovering the molecular virulence mechanisms, some intrinsic shortcomings have limited their wider applications. Notably, cell lines only contain a single cell type, which cannot reproduce some of the hallmarks of natural infections. While ex vivo tissues/organs alleviate some of these concerns, they are more difficult to maintain, in particular for long term experiments. In addition, non-human animal models are known to reflect only part of the human disease process. Enteroids and induced intestinal organoids are emerging as effective infection models due to their closeness in mimicking the infected tissues/organs. Induced intestinal organoids are derived from iPSCs and contain mesenchymal cells whereas enteroids are derive from intestinal stem cells and are comprised of epithelial cells only. Both enteroids and induced intestinal organoids mimic the villus and crypt domains comparable to the architectures of the in vivo intestine. We review here that enteroids and induced intestinal organoids are emerging as desired infection models to study bacterial-host interactions of Salmonella.
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Affiliation(s)
- Yuebang Yin
- Department of Gastroenterology and Hepatology, Erasmus MC-University Medical Center, Rotterdam, Netherlands
| | - Daoguo Zhou
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin, China.,Department of Biological Sciences, Purdue University, West Lafayette, IN, United States
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Altarugio R, Vellano I, Moraes A, Milbradt E, Andreatti Filho R, Guimarães-Okamoto P, Padovani C, Okamoto A. In vitro probiotic selection and characterization of Lactobacillus spp. isolated from healthy domesticated Turkeys. J APPL POULTRY RES 2018. [DOI: 10.3382/japr/pfx045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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27
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Yu SX, Chen W, Liu ZZ, Zhou FH, Yan SQ, Hu GQ, Qin XX, Zhang J, Ma K, Du CT, Gu JM, Deng XM, Han WY, Yang YJ. Non-Hematopoietic MLKL Protects Against Salmonella Mucosal Infection by Enhancing Inflammasome Activation. Front Immunol 2018; 9:119. [PMID: 29456533 PMCID: PMC5801401 DOI: 10.3389/fimmu.2018.00119] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/15/2018] [Indexed: 12/21/2022] Open
Abstract
The intestinal mucosal barrier is critical for host defense against pathogens infection. Here, we demonstrate that the mixed lineage kinase-like protein (MLKL), a necroptosis effector, promotes intestinal epithelial barrier function by enhancing inflammasome activation. MLKL−/− mice were more susceptible to Salmonella infection compared with wild-type counterparts, with higher mortality rates, increased body weight loss, exacerbated intestinal inflammation, more bacterial colonization, and severe epithelial barrier disruption. MLKL deficiency promoted early epithelial colonization of Salmonella prior to developing apparent intestinal pathology. Active MLKL was predominantly expressed in crypt epithelial cells, and experiments using bone marrow chimeras found that the protective effects of MLKL were dependent on its expression in non-hematopoietic cells. Intestinal mucosa of MLKL−/− mice had impaired caspase-1 and gasdermin D cleavages and decreased interleukin (IL)-18 release. Moreover, administration of exogenous recombinant IL-18 rescued the phenotype of increased bacterial colonization in MLKL−/− mice. Thus, our results uncover the role of MLKL in enhancing inflammasome activation in intestinal epithelial cells to inhibit early bacterial colonization.
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Affiliation(s)
- Shui-Xing Yu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Wei Chen
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Zhen-Zhen Liu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Feng-Hua Zhou
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Shi-Qing Yan
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Gui-Qiu Hu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xiao-Xia Qin
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Jie Zhang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Ke Ma
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Chong-Tao Du
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Jing-Min Gu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xu-Ming Deng
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Wen-Yu Han
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Yong-Jun Yang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
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Impact of Enteric Health and Mucosal Permeability on Skeletal Health and Lameness in Poultry. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1033:185-197. [PMID: 29101656 DOI: 10.1007/978-3-319-66653-2_9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Intestinal barrier leakage and/or altered gut microbial composition has been shown to markedly impact both osteoblast and osteoclast activities, systemically through circulation of gut immune cells and cytokines and locally by causing inflammation of extraintestinal organs such as the liver and bone marrow. Mild cases of heightened intestinal inflammation can cause bone loss in male mice in the absence of any overt nutritional deficiencies or weight loss, which has also been shown in chickens that have been infected with Salmonella. For poultry, ingredients selected for feed formulation have also a significant impact on gut health, intestinal microbiota, bone quality, and performance parameters. Consumption of diets with a high content of soluble non-starch polysaccharides (NSP) can affect bone quality parameters by reducing the amount of conjugated bile acids in the intestine, therefore diminishing the absorption of fat-soluble vitamins such as vitamin D and minerals like calcium and phosphorus. Recent enteric inflammation studies have shown that high NSP-containing diets have effects on intestinal viscosity, bone mineral content, and breaking strength, along with increased fluorescein isothiocyanate-dextran (FITC-d) leakage. Other skeletal diseases, such as bacterial chondronecrosis with osteomyelitis and enterococcal spondylitis, have a microbial component that is associated with increased mucosal permeability of the gut. Probiotics targeted toward control of enteric inflammation, either created through infectious disease or poor diet, may serve as a strategy for control of predisposing factors that lead to bone disorders.
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Diacovich L, Lorenzi L, Tomassetti M, Méresse S, Gramajo H. The infectious intracellular lifestyle of Salmonella enterica relies on the adaptation to nutritional conditions within the Salmonella-containing vacuole. Virulence 2016; 8:975-992. [PMID: 27936347 DOI: 10.1080/21505594.2016.1270493] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Salmonella enterica serovar Typhimurium (S. Typhimurium) is a Gram-negative pathogen that causes various host-specific diseases. During their life cycle, Salmonellae survive frequent exposures to a variety of environmental stresses, e.g. carbon-source starvation. The virulence of this pathogen relies on its ability to establish a replicative niche, named Salmonella-containing vacuole, inside host cells. However, the microenvironment of the SCV and the bacterial metabolic pathways required during infection are largely undefined. In this work we developed different biological probes whose expression is modulated by the environment and the physiological state of the bacterium. We constructed transcriptional reporters by fusing promoter regions to the gfpmut3a gene to monitor the expression profile of genes involved in glucose utilization and lipid catabolism. The induction of these probes by a specific metabolic change was first tested in vitro, and then during different conditions of infection in macrophages. We were able to determine that Entner-Doudoroff is the main metabolic pathway utilized by Salmonella during infection in mouse macrophages. Furthermore, we found sub-populations of bacteria expressing genes involved in pathways for the utilization of different sources of carbon. These populations are modified in presence of different metabolizable substrates, suggesting the coexistence of Salmonella with diverse metabolic states during the infection.
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Affiliation(s)
- Lautaro Diacovich
- a Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario , Rosario , Argentina
| | - Lucía Lorenzi
- a Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario , Rosario , Argentina
| | - Mauro Tomassetti
- a Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario , Rosario , Argentina
| | - Stéphane Méresse
- b Aix Marseille Université, CNRS, INSERM, CIML , Marseille , France
| | - Hugo Gramajo
- a Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario , Rosario , Argentina
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30
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Song WJ, Kang DH. Influence of water activity on inactivation of Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes in peanut butter by microwave heating. Food Microbiol 2016; 60:104-11. [DOI: 10.1016/j.fm.2016.06.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 06/02/2016] [Accepted: 06/13/2016] [Indexed: 11/30/2022]
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31
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Thornbrough JM, Gopinath A, Hundley T, Worley MJ. Human Genome-Wide RNAi Screen for Host Factors That Facilitate Salmonella Invasion Reveals a Role for Potassium Secretion in Promoting Internalization. PLoS One 2016; 11:e0166916. [PMID: 27880807 PMCID: PMC5120809 DOI: 10.1371/journal.pone.0166916] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 11/07/2016] [Indexed: 02/06/2023] Open
Abstract
Salmonella enterica can actively invade the gastro-intestinal epithelium. This frequently leads to diarrheal disease, and also gives the pathogen access to phagocytes that can serve as vehicles for dissemination into deeper tissue. The ability to invade host cells is also important in maintaining the carrier state. While much is known about the bacterial factors that promote invasion, relatively little is known about the host factors involved. To gain insight into how Salmonella enterica serovar Typhimurium is able to invade normally non-phagocytic cells, we undertook a global RNAi screen with S. Typhimurium-infected human epithelial cells. In all, we identified 633 genes as contributing to bacterial internalization. These genes fall into a diverse group of functional categories revealing that cytoskeletal regulators are not the only factors that modulate invasion. In fact, potassium ion transport was the most enriched molecular function category in our screen, reinforcing a link between potassium and internalization. In addition to providing new insights into the molecular mechanisms underlying the ability of pathogens to invade host cells, all 633 host factors identified are candidates for new anti-microbial targets for treating Salmonella infections, and may be useful in curtailing infections with other pathogens as well.
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Affiliation(s)
- Joshua M. Thornbrough
- Department of Biology, University of Louisville, Louisville, KY, 40292, United States of America
| | - Adarsh Gopinath
- Department of Biology, University of Louisville, Louisville, KY, 40292, United States of America
| | - Tom Hundley
- Department of Biology, University of Louisville, Louisville, KY, 40292, United States of America
| | - Micah J. Worley
- Department of Biology, University of Louisville, Louisville, KY, 40292, United States of America
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY, 40202, United States of America
- * E-mail:
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Latorre JD, Hernandez-Velasco X, Wolfenden RE, Vicente JL, Wolfenden AD, Menconi A, Bielke LR, Hargis BM, Tellez G. Evaluation and Selection of Bacillus Species Based on Enzyme Production, Antimicrobial Activity, and Biofilm Synthesis as Direct-Fed Microbial Candidates for Poultry. Front Vet Sci 2016; 3:95. [PMID: 27812526 PMCID: PMC5071321 DOI: 10.3389/fvets.2016.00095] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 10/05/2016] [Indexed: 11/14/2022] Open
Abstract
Social concern about misuse of antibiotics as growth promoters (AGP) and generation of multidrug-resistant bacteria have restricted the dietary inclusion of antibiotics in livestock feed in several countries. Direct-fed microbials (DFM) are one of the multiple alternatives commonly evaluated as substitutes of AGP. Sporeformer bacteria from the genus Bacillus have been extensively investigated because of their extraordinary properties to form highly resistant endospores, produce antimicrobial compounds, and synthesize different exogenous enzymes. The purpose of the present study was to evaluate and select Bacillus spp. from environmental and poultry sources as DFM candidates, considering their enzyme production profile, biofilm synthesis capacity, and pathogen-inhibition activity. Thirty-one Bacillus isolates were screened for in vitro relative enzyme activity of amylase, protease, lipase, and phytase using a selective media for each enzyme, with 3/31 strains selected as superior enzyme producers. These three isolates were identified as Bacillus subtilis (1/3), and Bacillus amyloliquefaciens (2/3), based on biochemical tests and 16S rRNA sequence analysis. For evaluation of biofilm synthesis, the generation of an adherent crystal violet-stained ring was determined in polypropylene tubes, resulting in 11/31 strains showing a strong biofilm formation. Moreover, all Bacillus strains were evaluated for growth inhibition activity against Salmonella enterica serovar Enteritidis (26/31), Escherichia coli (28/31), and Clostridioides difficile (29/31). Additionally, in previous in vitro and in vivo studies, these selected Bacillus strains have shown to be resistant to different biochemical conditions of the gastrointestinal tract of poultry. Results of the present study suggest that the selection and consumption of Bacillus-DFM, producing a variable set of enzymes and antimicrobial compounds, may contribute to enhanced performance through improving nutrient digestibility, reducing intestinal viscosity, maintaining a beneficial gut microbiota, and promoting healthy intestinal integrity in poultry.
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Affiliation(s)
- Juan D Latorre
- Department of Poultry Science, University of Arkansas , Fayetteville, AR , USA
| | - Xochitl Hernandez-Velasco
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México , Ciudad de México , México
| | | | | | - Amanda D Wolfenden
- Department of Poultry Science, University of Arkansas , Fayetteville, AR , USA
| | - Anita Menconi
- Pacific Vet Group-USA, Inc. , Fayetteville, AR , USA
| | - Lisa R Bielke
- Department of Poultry Science, University of Arkansas , Fayetteville, AR , USA
| | - Billy M Hargis
- Department of Poultry Science, University of Arkansas , Fayetteville, AR , USA
| | - Guillermo Tellez
- Department of Poultry Science, University of Arkansas , Fayetteville, AR , USA
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Lobato-Márquez D, Díaz-Orejas R, García-Del Portillo F. Toxin-antitoxins and bacterial virulence. FEMS Microbiol Rev 2016; 40:592-609. [PMID: 27476076 DOI: 10.1093/femsre/fuw022] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2016] [Indexed: 12/25/2022] Open
Abstract
Bacterial virulence relies on a delicate balance of signals interchanged between the invading microbe and the host. This communication has been extensively perceived as a battle involving harmful molecules produced by the pathogen and host defenses. In this review, we focus on a largely unexplored element of this dialogue, as are toxin-antitoxin (TA) systems of the pathogen. TA systems are reported to respond to stresses that are also found in the host and, as a consequence, could modulate the physiology of the intruder microbe. This view is consistent with recent studies that demonstrate a contribution of distinct TA systems to virulence since their absence alters the course of the infection. TA loci are stress response modules that, therefore, could readjust pathogen metabolism to favor the generation of slow-growing or quiescent cells 'before' host defenses irreversibly block essential pathogen activities. Some toxins of these TA modules have been proposed as potential weapons used by the pathogen to act on host targets. We discuss all these aspects based on studies that support some TA modules as important regulators in the pathogen-host interface.
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Affiliation(s)
- Damián Lobato-Márquez
- Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas (CNB-CSIC), Darwin 3, 28049 Madrid, Spain Centro de Investigaciones Biológicas-CSIC (CIB-CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Ramón Díaz-Orejas
- Centro de Investigaciones Biológicas-CSIC (CIB-CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Francisco García-Del Portillo
- Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas (CNB-CSIC), Darwin 3, 28049 Madrid, Spain
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Goh YS, Armour KL, Clark MR, Grant AJ, Mastroeni P. Igg Subclasses Targeting the Flagella of Salmonella enterica Serovar Typhimurium Can Mediate Phagocytosis and Bacterial Killing. ACTA ACUST UNITED AC 2016; 7. [PMID: 27366588 DOI: 10.4172/2157-7560.1000322] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Invasive non-typhoidal Salmonella are a common cause of invasive disease in immuno-compromised individuals and in children. Multi-drug resistance poses challenges to disease control, with a critical need for effective vaccines. Flagellin is an attractive vaccine candidate due to surface exposure and high epitope copy number, but its potential as a target for opsonophacytic antibodies is unclear. We examined the effect of targeting flagella with different classes of IgG on the interaction between Salmonella Typhimurium and a human phagocyte-like cell line, THP-1. We tagged the FliC flagellar protein with a foreign CD52 mimotope (TSSPSAD) and bacteria were opsonized with a panel of humanised CD52 antibodies with the same antigen-binding V-region, but different constant regions. We found that IgG binding to flagella increases bacterial phagocytosis and reduces viable intracellular bacterial numbers. Opsonisation with IgG3, followed by IgG1, IgG4, and IgG2, resulted in the highest level of bacterial uptake and in the highest reduction in the intracellular load of viable bacteria. Taken together, our data provide proof-of-principle evidence that targeting flagella with antibodies can increase the antibacterial function of host cells, with IgG3 being the most potent subclass. These data will assist the rational design of urgently needed, optimised vaccines against iNTS disease.
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Affiliation(s)
- Yun Shan Goh
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, United Kingdom
| | - Kathryn L Armour
- Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, United Kingdom
| | - Michael R Clark
- Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, United Kingdom
| | - Andrew J Grant
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, United Kingdom
| | - Pietro Mastroeni
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, United Kingdom
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35
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Song WJ, Shin JY, Ryu S, Kang DH. Inactivation of Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes in apple juice at different pH levels by gaseous ozone treatment. J Appl Microbiol 2015; 119:465-74. [PMID: 26033289 DOI: 10.1111/jam.12861] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 04/06/2015] [Accepted: 05/20/2015] [Indexed: 11/30/2022]
Abstract
AIMS We investigated the effect of ozone treatment of apple juice at different pH levels for inactivation of Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes. METHODS AND RESULTS Apple juice (pH 3.0, 4.0 and 5.0) inoculated with the three pathogens were treated with gaseous ozone (3.0 l min(-1) flow rate and 2.0-3.0 g m(-3) ) for up to 4 min. Ozone treatment (4 min) of pH 3.0 apple juice resulted in >5.36 log CFU ml(-1) reduction of E. coli O157:H7. Ozone treatment of pH 4.0 and 5.0 apple juice for 4 min reduced this pathogen by 5.12 log CFU ml(-1) and 1.86 log CFU ml(-1) respectively. The combination of low pH and ozone showed a great antimicrobial effect in apple juice. Salm. Typhimurium and L. monocytogenes showed a reduction trend similar to E. coli O157:H7. There were no significant changes of colour values when apple juice was treated with ozone, except for b values. Among all ozone treated samples, the browning index was lower than that of nontreated samples and there were no significant differences in total phenolic contents. CONCLUSIONS In conclusion, ozone treatment of low pH apple juice was significantly effective in inactivation of foodborne pathogens while maintaining acceptable apple juice quality. SIGNIFICANCE AND IMPACT OF THE STUDY The antimicrobial effect of ozone treatment on foodborne pathogens in apple juice can be reinforced by lowering the pH of apple juice.
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Affiliation(s)
- W-J Song
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Korea
| | - J-Y Shin
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Korea
| | - S Ryu
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Korea
| | - D-H Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Korea
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Campioni F, Pitondo-Silva A, Bergamini AMM, Falcão JP. Comparison of four molecular methods to type Salmonella Enteritidis strains. APMIS 2015; 123:422-6. [PMID: 25703542 DOI: 10.1111/apm.12367] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 12/23/2014] [Indexed: 11/29/2022]
Abstract
This study compared the pulsed-field gel electrophoresis (PFGE), enterobacterial repetitive intergenic consensus-PCR (ERIC-PCR), multilocus variable-number of tanden-repeat analysis (MLVA), and multilocus sequence typing (MLST) methods for typing 188 Salmonella Enteritidis strains from different sources isolated over a 24-year period in Brazil. PFGE and ERIC-PCR were more efficient than MLVA for subtyping the strains. However, MLVA provided additional epidemiological information for those strains. In addition, MLST showed the Brazilian strains as belonging to the main clonal complex of S. Enteritidis, CC11, and provided the first report of two new STs in the S. enterica database but could not properly subtype the strains. Our results showed that the use of PFGE or ERIC-PCR together with MLVA is suitable to efficiently subtype S. Enteritidis strains and provide important epidemiological information.
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Affiliation(s)
- Fábio Campioni
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
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37
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Augustine J, Bhat SG. Biocontrol of Salmonella
Enteritidis in spiked chicken cuts by lytic bacteriophages ΦSP-1 and ΦSP-3. J Basic Microbiol 2015; 55:500-3. [DOI: 10.1002/jobm.201400257] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Accepted: 12/07/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Jeena Augustine
- Department of Biotechnology; Cochin University of Science and Technology; Cochin, Kerala India
| | - Sarita G. Bhat
- Department of Biotechnology; Cochin University of Science and Technology; Cochin, Kerala India
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Kuhn KG, Emborg HD, Krogfelt KA, Mølbak K. Detecting non-typhoid Salmonella in humans by enzyme-linked immunosorbent assays (ELISAs): practical and epidemiological aspects. Methods Mol Biol 2015; 1225:117-126. [PMID: 25253252 DOI: 10.1007/978-1-4939-1625-2_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Salmonellosis caused by non-typhoid Salmonella serotypes is one of the most common causes of food-borne illness throughout the world. The diagnosis is primarily by culture and more recently molecular methods, whereas the use of serological methods for diagnosis of Salmonella infections is limited by high running costs as well as low sensitivity and specificity. Fast and reliable immunoassays for detection of S. typhi subunit antigens are commercially available, but there is no international consensus of similar tests for non-typhoid salmonellosis. Most immunoassays for non-typhoid human Salmonella diagnosis are developed in-house and used in-house for research or regional surveillance purposes. Only few laboratories use serology for the diagnosis of Salmonella-associated complications such as arthritis. Considering the current burden of disease, the development of a validated and standardized, commercially available antibody assay for diagnosing non-typhoid human salmonellosis can be of great benefit for diagnostic and surveillance purposes throughout the world.
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Affiliation(s)
- Katrin G Kuhn
- Statens Serum Institut, 5 Artillerivej, 2300, Copenhagen S, Denmark,
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39
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Baddam R, Kumar N, Shaik S, Lankapalli AK, Ahmed N. Genome dynamics and evolution of Salmonella Typhi strains from the typhoid-endemic zones. Sci Rep 2014; 4:7457. [PMID: 25504040 PMCID: PMC4264004 DOI: 10.1038/srep07457] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 11/24/2014] [Indexed: 01/13/2023] Open
Abstract
Typhoid fever poses significant burden on healthcare systems in Southeast Asia and other endemic countries. Several epidemiological and genomic studies have attributed pseudogenisation to be the major driving force for the evolution of Salmonella Typhi although its real potential remains elusive. In the present study, we analyzed genomes of S. Typhi from different parts of Southeast Asia and Oceania, comprising of isolates from outbreak, sporadic and carrier cases. The genomes showed high genetic relatedness with limited opportunity for gene acquisition as evident from pan-genome structure. Given that pseudogenisation is an active process in S. Typhi, we further investigated core and pan-genome profiles of functional and pseudogenes separately. We observed a decline in core functional gene content and a significant increase in accessory pseudogene content. Upon functional classification, genes encoding metabolic functions formed a major constituent of pseudogenes as well as core functional gene clusters with SNPs. Further, an in-depth analysis of accessory pseudogene content revealed the existence of heterogeneous complements of functional and pseudogenes among the strains. In addition, these polymorphic genes were also enriched in metabolism related functions. Thus, the study highlights the existence of heterogeneous strains in a population with varying metabolic potential and that S. Typhi possibly resorts to metabolic fine tuning for its adaptation.
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Affiliation(s)
- Ramani Baddam
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Gachibowli, Hyderabad 500046, India
| | - Narender Kumar
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Gachibowli, Hyderabad 500046, India
| | - Sabiha Shaik
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Gachibowli, Hyderabad 500046, India
| | - Aditya Kumar Lankapalli
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Gachibowli, Hyderabad 500046, India
| | - Niyaz Ahmed
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Gachibowli, Hyderabad 500046, India
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Adagbada AO, Coker AO, Smith SI, Adesida SA. The prevalence and plasmid profile of non-typhoidal salmonellosis in children in Lagos metropolis, South-western Nigeria. Pan Afr Med J 2014; 19:359. [PMID: 25932072 PMCID: PMC4407946 DOI: 10.11604/pamj.2014.19.359.2322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 11/17/2014] [Indexed: 11/30/2022] Open
Abstract
Introduction Non-typhoidal Salmonella is the causative agent of gastroenteritis, a food-borne and zoonotic infection which is a major cause of high morbidity and death among children under 5 years of age especially from resource poor settings like the developing countries. Methods This study was carried out for 6 months to determine the prevalence and plasmid profile of non-typhoidal salmonellosis in children in Lagos metropolis. A total of 105 stool samples were collected from diarrheal children aged 3 months to 12 years and processed during this period. The isolates were identified using Selenite F Broth, Salmonella-Shigella Agar, Kligler Iron Agar, and Motility-indole-Urea medium, citrate and sugar utilization tests. Results A total number of 127 isolates were identified, 2 of which are Salmonella enteritidis (1.6%). The non-typhoidal Salmonellae were sensitive to ciprofloxacin, cetotaxime, streptomycin, cotrimxazole and tetracycline. Only one of the 2 isolates (50%) was sensitive to amoxillin and sulphonamide while none of them (0%) was sensitive to cefuroxime. Conclusion The plasmid analysis of the isolates showed that they harboured no detectable plasmids; this suggests that the resistance was chromosomally mediated.
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Affiliation(s)
- Ajoke Olutola Adagbada
- Department of Medical Microbiology and Parasitology, College of Medicine, University of Lagos, Lagos, Nigeria
| | - Akitoye Olusegun Coker
- Department of Medical Microbiology and Parasitology, College of Medicine, University of Lagos, Lagos, Nigeria
| | - Stella Ifeanyi Smith
- Molecular Biology and Biotechnology Division, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
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Matsui H, Isshiki Y, Eguchi M, Ogawa Y, Shimoji Y. Evaluation of the live vaccine efficacy of virulence plasmid-cured, and phoP- or aroA-deficient Salmonella enterica serovar Typhimurium in mice. J Vet Med Sci 2014; 77:181-6. [PMID: 25341392 PMCID: PMC4363020 DOI: 10.1292/jvms.14-0013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We evaluated the protective efficacy of 94-kb virulence plasmid-cured, and phoP- or aroA-deficient strains of Salmonella enterica serovar Typhimurium (ΔphoP or ΔaroA S. Typhimurium) as oral vaccine candidates in BALB/c mice. Two weeks after the completion of 3 oral immunizations with 1 × 108 colony-forming units (CFU) of virulence plasmid-cured, and ΔphoP or ΔaroA S. Typhimurium at 10-day intervals, S. Typhimurium lipopolysaccharide (LPS)-specific mucosal secretory immunoglobulin A (s-IgA) antibody titers were detected in the cecal homogenate, bile and lung lavage fluid, but not in the intestinal lavage fluid. In addition, the increases in S. Typhimurium LPS-specific immunoglobulin G (IgG) and IgA antibody titers in the serum were also observed 2 weeks after completing 3 oral immunizations with virulence
plasmid-cured, and ΔphoP or ΔaroA S. Typhimurium. The series of 3 oral immunizations protected the mice against an oral challenge with 5 × 108 CFU of the virulent strain of S. Typhimurium, suggesting that both the virulence plasmid-cured, and ΔphoP and ΔaroA S. Typhimurium strains are promising candidates for safe and effective live S. Typhimurium vaccines.
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Affiliation(s)
- Hidenori Matsui
- Kitasato Institute for Life Sciences and Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
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Inhibition of Salmonella enterica biofilm formation using small-molecule adenosine mimetics. Antimicrob Agents Chemother 2014; 59:76-84. [PMID: 25313216 DOI: 10.1128/aac.03407-14] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Biofilms have been widely implicated in chronic infections and environmental persistence of Salmonella enterica, facilitating enhanced colonization of surfaces and increasing the ability of the bacteria to be transmitted to new hosts. Salmonella enterica serovar Typhi biofilm formation on gallstones from humans and mice enhances gallbladder colonization and bacterial shedding, while Salmonella enterica serovar Typhimurium biofilms facilitate long-term persistence in a number of environments important to food, medical, and farming industries. Salmonella regulates expression of many virulence- and biofilm-related processes using kinase-driven pathways. Kinases play pivotal roles in phosphorylation and energy transfer in cellular processes and possess an ATP-binding pocket required for their functions. Many other cellular proteins also require ATP for their activity. Here we test the hypothesis that pharmacological interference with ATP-requiring enzymes utilizing adenosine mimetic compounds would decrease or inhibit bacterial biofilm formation. Through the screening of a 3,000-member ATP mimetic library, we identified a single compound (compound 7955004) capable of significantly reducing biofilm formation by S. Typhimurium and S. Typhi. The compound was not bactericidal or bacteriostatic toward S. Typhimurium or cytotoxic to mammalian cells. An ATP-Sepharose affinity matrix technique was used to discover potential protein-binding targets of the compound and identified GroEL and DeoD. Compound 7955004 was screened against other known biofilm-forming bacterial species and was found to potently inhibit biofilms of Acinetobacter baumannii as well. The identification of a lead compound with biofilm-inhibiting capabilities toward Salmonella provides a potential new avenue of therapeutic intervention against Salmonella biofilm formation, with applicability to biofilms of other bacterial pathogens.
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Some aspects of control of salmonella infection in poultry for minimising contamination in the food chain. WORLD POULTRY SCI J 2014. [DOI: 10.1017/s0043933914000579] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Synthesis of metallo-β-lactamase VIM-2 is associated with a fitness reduction in Salmonella enterica Serovar Typhimurium. Antimicrob Agents Chemother 2014; 58:6528-35. [PMID: 25136026 DOI: 10.1128/aac.02847-14] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Antibiotic resistance, especially due to β-lactamases, has become one of the main obstacles in the correct treatment of Salmonella infections; furthermore, antibiotic resistance determines a gain of function that may encompass a biological cost, or fitness reduction, to the resistant bacteria. The aim of this work was to determine in vitro if the production of the class B β-lactamase VIM-2 determined a fitness cost for Salmonella enterica serovar Typhimurium. To that end the gene blaVIM-2 was cloned into the virulent strain S. Typhimurium SL1344, using both the tightly regulated pBAD22 vector and the natural plasmid pST12, for inducible and constitutive expression, respectively. Fitness studies were performed by means of motility, growth rate, invasiveness in epithelial cells, and plasmid stability. The expression of blaVIM-2 was accompanied by alterations in micro- and macroscopic morphology and reduced growth rate and motility, as well as diminished invasiveness in epithelial cells. These results suggest that VIM-2 production entails a substantial fitness cost for S. Typhimurium, which in turn may account for the extremely low number of reports of metallo-β-lactamase-producing Salmonella spp.
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Augustine J, Gopalakrishnan MV, Bhat SG. Application of ΦSP-1 and ΦSP-3 as a therapeutic strategy against Salmonella Enteritidis infection using Caenorhabditis elegans as model organism. FEMS Microbiol Lett 2014; 356:113-7. [PMID: 24893888 DOI: 10.1111/1574-6968.12493] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 05/31/2014] [Indexed: 11/28/2022] Open
Abstract
The potential of Salmonella-specific phages ΦSP-1 and ΦSP-3 as biocontrol agents was studied in vitro, employing host cell lysis test and in vivo, using Caenorhabditis elegans as a model organism. For in vivo testing, stage 4 C. elegans larvae were experimentally infected with the pathogen Salmonella. Worm mortality was scored for 10 days. TD50 (the time required for 50% of the nematodes to die) of infected worms in the presence of bacteriophages was comparable to uninfected worms, and the two phages provided an increased protection than each one. This study in addition demonstrated the simplicity, elegance, and the cost effectiveness of the C. elegans model for in vivo validation.
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Affiliation(s)
- Jeena Augustine
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, India
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Latorre JD, Hernandez-Velasco X, Kallapura G, Menconi A, Pumford NR, Morgan MJ, Layton SL, Bielke LR, Hargis BM, Téllez G. Evaluation of germination, distribution, and persistence of Bacillus subtilis spores through the gastrointestinal tract of chickens. Poult Sci 2014; 93:1793-800. [PMID: 24812242 DOI: 10.3382/ps.2013-03809] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Spores are popular as direct-fed microbials, though little is known about their mode of action. Hence, the first objective of the present study was to evaluate the in vitro germination and growth rate of Bacillus subtilis spores. Approximately 90% of B. subtilis spores germinate within 60 min in the presence of feed in vitro. The second objective was to determine the distribution of these spores throughout different anatomical segments of the gastrointestinal tract (GIT) in a chicken model. For in vivo evaluation of persistence and dissemination, spores were administered to day-of-hatch broiler chicks either as a single gavage dose or constantly in the feed. During 2 independent experiments, chicks were housed in isolation chambers and fed sterile corn-soy-based diets. In these experiments one group of chickens was supplemented with 10(6) spores/g of feed, whereas a second group was gavaged with a single dose of 10(6) spores per chick on day of hatch. In both experiments, crop, ileum, and cecae were sampled from 5 chicks at 24, 48, 72, 96, and 120 h. Viable B. subtilis spores were determined by plate count method after heat treatment (75°C for 10 min). The number of recovered spores was constant through 120 h in each of the enteric regions from chickens receiving spores supplemented in the feed. However, the number of recovered B. subtilis spores was consistently about 10(5) spores per gram of digesta, which is about a 1-log10 reduction of the feed inclusion rate, suggesting approximately a 90% germination rate in the GIT when fed. On the other hand, recovered B. subtilis spores from chicks that received a single gavage dose decreased with time, with only approximately 10(2) spores per gram of sample by 120 h. This confirms that B. subtilis spores are transiently present in the GIT of chickens, but the persistence of vegetative cells is presently unknown. For persistent benefit, continuous administration of effective B. subtilis direct-fed microbials as vegetative cells or spores is advisable.
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Affiliation(s)
- J D Latorre
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - X Hernandez-Velasco
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, 04510, México
| | - G Kallapura
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - A Menconi
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - N R Pumford
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - M J Morgan
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - S L Layton
- Argentina Vetanco S.A. Chile 33 (B1603CMA) Vicente López, Buenos Aires, Argentina 1638
| | - L R Bielke
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - B M Hargis
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - G Téllez
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
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Giacomodonato MN, Noto Llana M, Aya Castañeda MDR, Buzzola FR, Sarnacki SH, Cerquetti MC. AvrA effector protein of Salmonella enterica serovar Enteritidis is expressed and translocated in mesenteric lymph nodes at late stages of infection in mice. MICROBIOLOGY-SGM 2014; 160:1191-1199. [PMID: 24705228 DOI: 10.1099/mic.0.077115-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Salmonellosis is a major health problem worldwide. Salmonella enterica serovar Enteritidis (S. Enteritidis) has been a primary cause of Salmonella outbreaks in many countries. AvrA is an SPI-1 effector protein involved in the enteritis pathway, with critical roles in inhibiting inflammation and apoptosis. In this work, we constructed an AvrA-FLAG-tagged strain of S. Enteritidis to analyse the expression profile of AvrA in vitro, in cell culture and in vivo. AvrA expression and secretion were observed in vitro under culture conditions that mimicked intestinal and intracellular environments. In agreement, bacteria isolated from infected cell monolayers expressed and translocated AvrA for at least 24 h post-inoculation. For in vivo experiments, BALB/c mice were inoculated by the natural route of infection with the AvrA-FLAG strain. Infecting bacteria and infected cells were recovered from mesenteric lymph nodes (MLN). Our results showed that AvrA continues to be synthesized in vivo up to day 8 post-inoculation. Moreover, AvrA translocation was detected in the cytosol of cells isolated from MLN 8 days after infection. Interestingly, we observed that AvrA is secreted by both type three secretion system (T3SS)-1 and T3SS-2. In summary, these findings indicate that AvrA expression is not constrained to the initial host-bacteria encounter in the intestinal environment as defined previously. The AvrA effector may participate also in systemic S. Enteritidis infection.
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Affiliation(s)
- Mónica N Giacomodonato
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM-CONICET) and Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mariángeles Noto Llana
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM-CONICET) and Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María Del Rosario Aya Castañeda
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM-CONICET) and Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fernanda R Buzzola
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM-CONICET) and Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Sebastián H Sarnacki
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM-CONICET) and Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María C Cerquetti
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM-CONICET) and Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
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Song WJ, Sung HJ, Kim SY, Kim KP, Ryu S, Kang DH. Inactivation of Escherichia coli O157:H7 and Salmonella Typhimurium in black pepper and red pepper by gamma irradiation. Int J Food Microbiol 2013; 172:125-9. [PMID: 24370971 DOI: 10.1016/j.ijfoodmicro.2013.11.017] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 11/14/2013] [Accepted: 11/16/2013] [Indexed: 10/26/2022]
Abstract
This study evaluated the efficacy of gamma irradiation to inactivate foodborne pathogens in black pepper (Piper nigrum) and red pepper (dried Capsicum annuum). Black pepper and red pepper inoculated with Escherichia coli O157:H7 and Salmonella Typhimurium were subjected to gamma irradiation in the range of 0, 1, 2, 3 and 5 kGy, and color change was evaluated after treatment. Pathogen populations decreased with increasing treatment doses. A gamma irradiation dose of 5 kGy decreased E. coli O157:H7 and S. Typhimurium populations >4.4 to >5.2 log CFU/g in black pepper without causing color change. Similarly, 5 kGy of gamma irradiation yielded reduction of 3.8 to >5.2 log CFU/g for E. coli O157:H7 and S. Typhimurium in red pepper. During gamma irradiation treatment, L*, a* and b* values of red pepper were not significantly changed except for 297 μm to 420 μm size red pepper treated with 5 kGy of gamma irradiation. Based on the D-value of pathogens in black pepper and red pepper, S. Typhimurium showed more resistant to gamma irradiation than did E. coli O157:H7. These results show that gamma irradiation has potential as a non-thermal process for inactivating foodborne pathogens in spices with minimal color changes.
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Affiliation(s)
- Won-Jae Song
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Hye-Jung Sung
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Sung-Youn Kim
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Kwang-Pyo Kim
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Chonbuk National University, Jeonju 561-756, Republic of Korea
| | - Sangryeol Ryu
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Dong-Hyun Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea.
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Menconi A, Pumford NR, Morgan MJ, Bielke LR, Kallapura G, Latorre JD, Wolfenden AD, Hernandez-Velasco X, Hargis BM, Tellez G. Effect of chitosan on Salmonella Typhimurium in broiler chickens. Foodborne Pathog Dis 2013; 11:165-9. [PMID: 24237042 DOI: 10.1089/fpd.2013.1628] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Public concern with the incidence of antibiotic-resistant bacteria, particularly among foodborne pathogens such as Salmonella, has been challenging the poultry industry to find alternative means of control. The purposes of the present study were to evaluate in vitro and in vivo effects of chitosan on Salmonella enterica serovar Typhimurium (ST) infection in broiler chicks. For in vitro crop assay experiments, tubes containing feed, water, and ST were treated with either saline as a control or 0.2% chitosan. The entire assay was repeated in three trials. In two independent in vivo trials, 40 broiler chicks were assigned to an untreated control diet or dietary treatment with 0.2% chitosan for 7 days (20 broiler chicks/treatment). At day 4, chicks were challenged with 2×10⁵ colony-forming units (CFU) ST/bird. In a third in vivo trial, 100 broiler chicks were assigned to untreated control diet or dietary treatment with 0.2% chitosan for 10 days (50 broiler chicks/treatment) to evaluate ST horizontal transmission. At day 3, 10 birds were challenged with 10⁵ CFU ST/bird, and the remaining nonchallenged birds (n=40) were kept in the same floor pen. In all three in vitro trials, 0.2% chitosan significantly reduced total CFU of ST at 0.5 and 6 h postinoculation compared with control (p<0.05). In two in vivo trials, at 7 days, dietary 0.2% chitosan significantly reduced total CFU of recovered ST in the ceca in both experiments. Dietary 0.2% chitosan significantly reduced total ST CFU recovered in the ceca of horizontally challenged birds in the third in vivo trial. Chitosan at 0.2% significantly reduced the CFU of recovered ST in vitro and in vivo, proving to be an alternative tool to reduce crop, ceca, and consequently carcass ST contamination as well as decreasing the amount of ST shed to the environment.
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Affiliation(s)
- Anita Menconi
- 1 Department of Poultry Science, University of Arkansas , Fayetteville, Arkansas
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Salmonella enteridis Septic Arthritis: A Report of Two Cases. Case Rep Infect Dis 2013; 2013:642805. [PMID: 24251049 PMCID: PMC3819818 DOI: 10.1155/2013/642805] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 09/15/2013] [Indexed: 12/26/2022] Open
Abstract
Introduction. Nontyphoidal salmonellosis causes significant morbidity, is transmitted via fecal-oral route, and is a worldwide cause of gastroenteritis, bacteremia, and local infections. Salmonella is a less common etiologic factor for septic arthritis compared with other gram-negative bacteria. Cases. We present two septic arthritis cases with Salmonella enteridis as a confirmed pathogen and also discuss the predisposing factors and treatment. Discussion. Septic arthritis is an orthopedic emergency. The gold standard treatment of septic arthritis is joint debridement, antibiotic therapy according to the culture results, and physiotherapy, which should start in the early postoperative period to prevent limitation of motion. Salmonella is an atypical agent for septic arthritis. It must be particularly kept in mind as an etiologic factor for the acute arthritis of a patient with sickle cell anemia and systemic lupus erythematosus. Clinicians should be cautious that the white blood cell count in synovial fluid can be under 50.000/mm3 in immune compromised individuals with septic arthritis. The inflammatory response can be deficient, or the microorganism may be atypical. Conclusion. Atypical bacteria such as Salmonella species in immune compromised patients can cause joint infections. Therefore, Salmonella species must always be kept in mind for the differential diagnosis of septic arthritis in a clinically relevant setting.
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