1
|
Chen S, Lai W, Song X, Lu J, Liang J, Ouyang H, Zheng W, Chen J, Yin Z, Li H, Zhou Y. The distribution and antibiotic-resistant characteristics and risk factors of pathogens associated with clinical biliary tract infection in humans. Front Microbiol 2024; 15:1404366. [PMID: 38784792 PMCID: PMC11112516 DOI: 10.3389/fmicb.2024.1404366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 04/26/2024] [Indexed: 05/25/2024] Open
Abstract
Introduction Biliary Infection in patients is a common and important phenomenon resulting in severe complications and high morbidity, while the distributions and drug resistance profiles of biliary bacteria and related risk factors are dynamic. This study explored the characteristics of and risk factors for biliary infection to promote the rational use of antibiotics in clinically. Methods Bacterial identification and drug susceptibility testing were completed using the Vitek 2 Compact analysis system. The distribution and antibiotic-resistant characteristics of 3,490 strains of biliary bacteria in patients at Nankai Hospital from 2019 to 2021 were analyzed using Whonet 5.6 and SPSS 26.0 software. We then retrospectively analyzed the clinical data and risk factors associated with 2,340 strains of Gram-negative bacilli, which were divided into multidrug-resistant bacteria (1,508 cases) and non-multidrug-resistant bacteria (832 cases) by a multivariate Cox regression model. Results and discussion A total of 3,490 pathogenic bacterial strains were isolated from bile samples, including 2,340 (67.05%) Gram-negative strains, 1,029 (29.48%) Gram-positive strains, and 109 (4.56%) fungal strains. The top five pathogenic bacteria were Escherichia coli, Klebsiella pneumoniae, Enterococcus faecium, Enterococcus faecalis, and Pseudomonas aeruginosa. The rate of Escherichia coli resistance to ciprofloxacin increased (p < 0.05), while the resistance to amikacin decreased (p < 0.05). The resistance of Klebsiella pneumoniae to cephalosporins, carbapenems, β-lactamase inhibitors, cephalases, aminoglycosides, and quinolones increased (p < 0.05), and the resistance of Pseudomonas aeruginosa to piperacillin, piperacillin/tazobactam, ticacillin/clavulanic acid, and amicacin declined significantly (p < 0.05). The resistance of Enterococcus faecium to tetracycline increased by year (p < 0.05), and the resistance of Enterococcus faecalis to erythromycin and high-concentration gentamicin declined (p < 0.05). Multivariate logistic regression analysis suggested that the administration of third- or fourth-generation cephalosporins was an independent risk factor for biliary infection. In summary, Gram-negative bacilli were the most common pathogenic bacteria isolated from biliary infection patients, especially Escherichia coli, and the rates and patterns of drug resistance were high and in constant flux; therefore, rational antimicrobial drug use should be carried out considering risk factors.
Collapse
Affiliation(s)
- Shayan Chen
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
- Central Laboratory, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Precision Medicine, Guangdong, China
| | - Wenbin Lai
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Xuejing Song
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
- Central Laboratory, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Precision Medicine, Guangdong, China
| | - Jiongtang Lu
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Jianxin Liang
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Hao Ouyang
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Weihua Zheng
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Jianjun Chen
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Zhenggang Yin
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Huimin Li
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| | - Yong Zhou
- Department of Laboratory Science, Binhaiwan Central Hospital of Dongguan, Guangdong, China
- Dongguan Key Laboratory of Accurate Etiological Research on the Pathogenesis of Inflammation and Cancer, Guangdong, China
| |
Collapse
|
2
|
Vivekanandan KE, Kasimani R, Kumar PV, Meenatchisundaram S, Sundar WA. Overview of cloning in lactic acid bacteria: Expression and its application of probiotic potential in inflammatory bowel diseases. Biotechnol Appl Biochem 2024. [PMID: 38576028 DOI: 10.1002/bab.2584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 03/22/2024] [Indexed: 04/06/2024]
Abstract
Inflammatory bowel disease (IBD) imposes a significant impact on the quality of life for affected individuals. However, there was a current lack of a systematic summary regarding the latest epidemic trends and the underlying pathogenesis of IBD. This highlights the need for a thorough examination of both the epidemiological aspects of IBD and the specific mechanisms by which lactic acid bacteria (LAB) contribute to mitigating this condition. In developed countries, higher incidences and death rates of IBD have been observed, influenced by a combination of environmental and genetic factors. LAB offer significant advantages and substantial potential for enhancing IBD treatment. LAB's capabilities include the production of bioactive metabolites, regulation of gut immunity, protection of intestinal mechanical barriers, inhibition of oxidative damage, and restoration of imbalanced gut microbiota. The review suggests that screening effective LAB using cell models and metabolites, optimizing LAB intake through dose-effect studies, enhancing utilization through nanoencapsulation and microencapsulation, investigating mechanisms to deepen the understanding of LAB, and refining clinical study designs. These efforts aim to contribute to comprehending the epidemic trend, pathogenesis, and treatment of IBD, ultimately fostering the development of targeted therapeutic products, such as LAB-based interventions.
Collapse
Affiliation(s)
- K E Vivekanandan
- Department of Microbiology, Nehru Arts and Science College, Coimbatore, Tamil Nadu, India
| | - R Kasimani
- Department of Microbiology, Nehru Arts and Science College, Coimbatore, Tamil Nadu, India
| | - P Vinoth Kumar
- Department of Microbiology, Nehru Arts and Science College, Coimbatore, Tamil Nadu, India
| | - S Meenatchisundaram
- Department of Microbiology, Shree Nehru Maha Vidyalaya College of Arts and Science, Coimbatore, Tamil Nadu, India
| | - William Arputha Sundar
- Department of Pharmaceuticals, Swamy Vivekananda College of Pharmacy, Namakkal, Tamil Nadu, India
| |
Collapse
|
3
|
Baquero F, Rodríguez-Beltrán J, Coque TM, del Campo R. Boosting Fitness Costs Associated with Antibiotic Resistance in the Gut: On the Way to Biorestoration of Susceptible Populations. Biomolecules 2024; 14:76. [PMID: 38254676 PMCID: PMC10812938 DOI: 10.3390/biom14010076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 12/27/2023] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
The acquisition and expression of antibiotic resistance implies changes in bacterial cell physiology, imposing fitness costs. Many human opportunistic pathogenic bacteria, such as those causing urinary tract or bloodstream infections, colonize the gut. In this opinionated review, we will examine the various types of stress that these bacteria might suffer during their intestinal stay. These stresses, and their compensatory responses, probably have a fitness cost, which might be additive to the cost of expressing antibiotic resistance. Such an effect could result in a disadvantage relative to antibiotic susceptible populations that might replace the resistant ones. The opinion proposed in this paper is that the effect of these combinations of fitness costs should be tested in antibiotic resistant bacteria with susceptible ones as controls. This testing might provide opportunities to increase the bacterial gut stress boosting physiological biomolecules or using dietary interventions. This approach to reduce the burden of antibiotic-resistant populations certainly must be answered empirically. In the end, the battle against antibiotic resistance should be won by antibiotic-susceptible organisms. Let us help them prevail.
Collapse
Affiliation(s)
- Fernando Baquero
- Department of Microbiology, Ramón y Cajal University Hospital, Ramón y Cajal Institute for Health Research (IRYCIS), 28034 Madrid, Spain
- Network Center for Biomedical Research in Epidemiology and Public Health (CIBER-ESP), 28029 Madrid, Spain
| | - Jerónimo Rodríguez-Beltrán
- Department of Microbiology, Ramón y Cajal University Hospital, Ramón y Cajal Institute for Health Research (IRYCIS), 28034 Madrid, Spain
- Network Center for Biomedical Research in Infectious Diseases (CIBER-INFEC), 28034 Madrid, Spain
| | - Teresa M. Coque
- Department of Microbiology, Ramón y Cajal University Hospital, Ramón y Cajal Institute for Health Research (IRYCIS), 28034 Madrid, Spain
- Network Center for Biomedical Research in Infectious Diseases (CIBER-INFEC), 28034 Madrid, Spain
| | - Rosa del Campo
- Department of Microbiology, Ramón y Cajal University Hospital, Ramón y Cajal Institute for Health Research (IRYCIS), 28034 Madrid, Spain
- Network Center for Biomedical Research in Infectious Diseases (CIBER-INFEC), 28034 Madrid, Spain
| |
Collapse
|
4
|
Jiang L, Yuan C, Ye W, Huang Q, Chen Z, Wu W, Qian L. Akkermansia and its metabolites play key roles in the treatment of campylobacteriosis in mice. Front Immunol 2023; 13:1061627. [PMID: 36713373 PMCID: PMC9877526 DOI: 10.3389/fimmu.2022.1061627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/21/2022] [Indexed: 01/13/2023] Open
Abstract
Introduction Campylobacter jejuni (C. jejuni) is a common food-borne bacterial pathogen that can use the host's innate immune response to induce the development of colitis. There has been some research on the role of normal intestinal flora in C. jejuni-induced colitis, but the mechanisms that play a central role in resistance to C. jejuni infection have not been explored. Methods We treated Campylobacter jejuni-infected mice with fecal microbiota transplantation (FMT), oral butyric acid and deoxycholic acid in a controlled trial and analyzed the possible mechanisms of treatment by a combination of chromatography, immunohistochemistry, fluorescence in situ hybridization, 16s rRNA gene, proteomics and western blot techniques. Results We first investigated the therapeutic effect of FMT on C. jejuni infection. The results showed that FMT significantly reduced the inflammatory response and blocked the invasion of C.jejuni into the colonic tissue. We observed a significant increase in the abundance of Akkermansia in the colon of mice after FMT, as well as a significant increase in the levels of butyric acid and deoxycholic acid. We next demonstrated that oral administration of sodium butyrate or deoxycholic acid had a similar therapeutic effect. Further proteomic analysis showed that C.jejuni induced colitis mainly through activation of the PI3K-AKT signaling pathway and MAPK signaling pathway, whereas Akkermansia, the core flora of FMT, and the gut microbial metabolites butyric acid and deoxycholic acid both inhibited these signaling pathways to counteract the infection of C. jejuni and alleviate colitis. Finally, we verified the above idea by in vitro cellular assays. In conclusion, FMT is highly effective in the treatment of colitis caused by C. jejuni, with which Akkermansia and butyric and deoxycholic acids are closely associated.The present study demonstrates that Akkermansia and butyric and deoxycholic acids are effective in the treatment of colitis caused by C. jejuni. Discussion This is the first time that Akkermansia has been found to be effective in fighting pathogens, which provides new ideas and insights into the use of FMT to alleviate colitis caused by C. jejuni and Akkermansia as a treatment for intestinal sexually transmitted diseases caused by various pathogens.
Collapse
Affiliation(s)
- Lai Jiang
- Key Laboratory of Animal Nutrition and Feed Science, Ministry of Agriculture and Rural Affairs, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Chunchun Yuan
- Key Laboratory of Animal Nutrition and Feed Science, Ministry of Agriculture and Rural Affairs, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Wenxin Ye
- Hainan Institute of Zhejiang University, Sanya, China
| | - Qixin Huang
- Key Laboratory of Animal Nutrition and Feed Science, Ministry of Agriculture and Rural Affairs, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Zhuo Chen
- Hainan Institute of Zhejiang University, Sanya, China
| | - Wenzi Wu
- Hainan Institute of Zhejiang University, Sanya, China
| | - Lichun Qian
- Key Laboratory of Animal Nutrition and Feed Science, Ministry of Agriculture and Rural Affairs, College of Animal Sciences, Zhejiang University, Hangzhou, China,*Correspondence: Lichun Qian,
| |
Collapse
|
5
|
Prevalence, genotypic diversity and detection of virulence genes in thermotolerant Campylobacter at different stages of the poultry meat supply chain. Int J Food Microbiol 2020; 326:108641. [PMID: 32371295 DOI: 10.1016/j.ijfoodmicro.2020.108641] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 04/06/2020] [Accepted: 04/14/2020] [Indexed: 12/19/2022]
Abstract
Thermotolerant Campylobacter is the leading bacterial cause of foodborne illness in humans worldwide. The objectives of this study were to estimate prevalence and to identify and characterize potential sources of thermotolerant Campylobacter contamination in broilers on farms and at the slaughterhouse; to evaluate the clonal relationship among thermotolerant Campylobacter isolates from different stages of the broiler meat supply chain, and to analyze the presence of virulence genes in different sources of thermotolerant Campylobacter. A total of 1210 samples were collected from three broiler meat supply chains in Santa Fe, Argentina. At the farms, the sampling collection included broilers one week prior to slaughter, wild-living birds, domestic dogs, wild rodents, farm workers' boots, litter, feed, drinking water, flies, and darkling beetles (Alphitobius diaperinus). At the slaughtering line, the samples taken were from the evisceration zone (broiler cecum, working surfaces, evisceration knives and workers' hands), from the chiller zone (surfaces and direct supply water) and from the packing zone (work surfaces, workers' hands and broiler carcasses). The samples taken along each supply chain were in the same batch. The isolates obtained were identified to the species level (C. jejuni and C. coli) by multiplex PCR and were analyzed using pulsed-field gel electrophoresis to compare different profiles according to the source. Finally, the presence of 11 virulence genes was examined (cadF, cdtA, cdtB, cdtC, ciaB, flaA, flhA, iam, wlaN, virB11, racR). From 254 isolates, 128 (50.4%) were Campylobacter jejuni and 126 (49.6%) Campylobacter coli. C. jejuni was the species most prevalent in farm and C. coli the species most prevalent at the slaughterhouse. We detected thermotolerant Campylobacter in samples of wild birds, darkling beetles, farm workers' boots, flies and litter. At the slaughterhouse, the prevalence varied along the process line. By analyzing PFGE results, C. jejuni showed 21 profiles with three predominant genotypes, while C. coli showed 14 profiles with four predominant genotypes. A high genotype diversity was found; however, relationships between isolates from different stages of the broiler meat chain, between broiler and potential sources of thermotolerant Campylobacter contamination and between strains in the farm and in the slaughterhouse were detected. Furthermore, there was evidence of cross-contamination at the slaughterhouse. FlaA, flhA genes were detected in all strains, and the third most prevalent virulence gene was cadF. Only those strains obtained from flies, wild-living birds and broiler carcass samples harbored 10 of 11 pathogenic genes. The prevalence of some pathogenic genes between C. jejuni and C. coli was different. This evidence should contribute the scientific basis to implement risk management measures in public health.
Collapse
|
6
|
Survival of the Fittest: How Bacterial Pathogens Utilize Bile To Enhance Infection. Clin Microbiol Rev 2017; 29:819-36. [PMID: 27464994 DOI: 10.1128/cmr.00031-16] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Bacterial pathogens have coevolved with humans in order to efficiently infect, replicate within, and be transmitted to new hosts to ensure survival and a continual infection cycle. For enteric pathogens, the ability to adapt to numerous host factors under the harsh conditions of the gastrointestinal tract is critical for establishing infection. One such host factor readily encountered by enteric bacteria is bile, an innately antimicrobial detergent-like compound essential for digestion and nutrient absorption. Not only have enteric pathogens evolved to resist the bactericidal conditions of bile, but these bacteria also utilize bile as a signal to enhance virulence regulation for efficient infection. This review provides a comprehensive and up-to-date analysis of bile-related research with enteric pathogens. From common responses to the unique expression of specific virulence factors, each pathogen has overcome significant challenges to establish infection in the gastrointestinal tract. Utilization of bile as a signal to modulate virulence factor expression has led to important insights for our understanding of virulence mechanisms for many pathogens. Further research on enteric pathogens exposed to this in vivo signal will benefit therapeutic and vaccine development and ultimately enhance our success at combating such elite pathogens.
Collapse
|
7
|
Lapierre L, Gatica MA, Riquelme V, Vergara C, Yañez JM, San Martín B, Sáenz L, Vidal M, Martínez MC, Araya P, Flores R, Duery O, Vidal R. Characterization of Antimicrobial Susceptibility and Its Association with Virulence Genes Related to Adherence, Invasion, and Cytotoxicity inCampylobacter jejuniandCampylobacter coliIsolates from Animals, Meat, and Humans. Microb Drug Resist 2016; 22:432-44. [DOI: 10.1089/mdr.2015.0055] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Lisette Lapierre
- Faculty of Veterinary and Animal Sciences, University of Chile, Santiago, Chile
| | - María A. Gatica
- Faculty of Veterinary and Animal Sciences, University of Chile, Santiago, Chile
| | - Víctor Riquelme
- Faculty of Veterinary and Animal Sciences, University of Chile, Santiago, Chile
| | - Constanza Vergara
- Faculty of Veterinary and Animal Sciences, University of Chile, Santiago, Chile
| | - José Manuel Yañez
- Faculty of Veterinary and Animal Sciences, University of Chile, Santiago, Chile
| | - Betty San Martín
- Faculty of Veterinary and Animal Sciences, University of Chile, Santiago, Chile
| | - Leonardo Sáenz
- Faculty of Veterinary and Animal Sciences, University of Chile, Santiago, Chile
| | - Maricel Vidal
- Environmental Health Department, Ministry of Health of Chile, Santiago, Chile
| | | | - Pamela Araya
- Bacteriology Laboratory, Public Health Institute of Chile, Santiago, Chile
| | - Roberto Flores
- Bacteriology Laboratory, Public Health Institute of Chile, Santiago, Chile
| | - Oscar Duery
- Bacteriology Laboratory, Public Health Institute of Chile, Santiago, Chile
| | - Roberto Vidal
- Faculty of Medicine, University of Chile, Santiago, Chile
| |
Collapse
|
8
|
The Biocide and Antibiotic Resistance in Campylobacter jejuni and Campylobacter coli. FOOD ENGINEERING SERIES 2016. [DOI: 10.1007/978-3-319-24040-4_15] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
|
9
|
Corcionivoschi N, Gundogdu O, Moran L, Kelly C, Scates P, Stef L, Cean A, Wren B, Dorrell N, Madden RH. Virulence characteristics of hcp (+) Campylobacter jejuni and Campylobacter coli isolates from retail chicken. Gut Pathog 2015. [PMID: 26207145 PMCID: PMC4511981 DOI: 10.1186/s13099-015-0067-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Background Recently the Type VI secretion
system (T6SS), which can play a significant role in bacterial survival and pathogenesis, was reported in Campylobacter spp., having the hcp gene as a key component. Methods Campylobacteriosis is associated with the consumption of infected chicken meat. Our study aimed to explore the presence of T6SS in C. jejuni (n = 59) and C. coli (n = 57) isolates, from retail raw chicken and to investigate their pathogenic potential. The hcp gene was used as an indicator for the T6SS presence. Results Using multiplex PCR we have identified a significantly higher prevalence of hcp in C. coli isolates (56.1%) than in C. jejuni (28.8%) and AFLP analysis of the isolates showed a high degree of genetic similarity between the isolates carrying the hcp gene. Genome sequencing data showed that 84.3% of the C. coli and 93.7% of the C. jejuni isolates had all 13 T6SS open reading frames. Moreover, the virulence characteristics of hcp + isolates, including motility and the ability to invade human intestinal epithelial cells in vitro, were significantly greater than in the control strain C. jejuni 12502; a human isolate which is hcp positive. Conclusion Overall, it was discovered that hcp+C. coli and C. jejuni isolated from retail chicken isolates posses genetic and phenotypic properties associated with enhanced virulence. However, since human infections with C. coli are significantly less frequent than those of C. jejuni, the relationship between virulence factors and pathogenesis requires further study.
Collapse
Affiliation(s)
- Nicolae Corcionivoschi
- Agri-Food and Biosciences Institute, Food Microbiology, Newforge Lane, Belfast, BT9 5PX UK ; School of Animal Science and Biotechnology, Banat University of Animal Sciences and Veterinary Medicine-King Michael I of Romania, Calea Aradului nr. 119, Timisoara, Romania
| | - Ozan Gundogdu
- London School of Hygiene and Tropical Medicine, London, UK
| | - Lynn Moran
- Agri-Food and Biosciences Institute, Food Microbiology, Newforge Lane, Belfast, BT9 5PX UK
| | - Carmel Kelly
- Agri-Food and Biosciences Institute, Food Microbiology, Newforge Lane, Belfast, BT9 5PX UK
| | - Pam Scates
- Agri-Food and Biosciences Institute, Food Microbiology, Newforge Lane, Belfast, BT9 5PX UK
| | - Lavinia Stef
- School of Animal Science and Biotechnology, Banat University of Animal Sciences and Veterinary Medicine-King Michael I of Romania, Calea Aradului nr. 119, Timisoara, Romania
| | - Ada Cean
- School of Animal Science and Biotechnology, Banat University of Animal Sciences and Veterinary Medicine-King Michael I of Romania, Calea Aradului nr. 119, Timisoara, Romania
| | - Brendan Wren
- London School of Hygiene and Tropical Medicine, London, UK
| | - Nick Dorrell
- London School of Hygiene and Tropical Medicine, London, UK
| | - Robert H Madden
- Agri-Food and Biosciences Institute, Food Microbiology, Newforge Lane, Belfast, BT9 5PX UK
| |
Collapse
|
10
|
Hungaro HM, Mendonça RCS, Rosa VO, Badaró ACL, Moreira MAS, Chaves JBP. Low contamination of Campylobacter spp. on chicken carcasses in Minas Gerais state, Brazil: Molecular characterization and antimicrobial resistance. Food Control 2015. [DOI: 10.1016/j.foodcont.2014.11.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
11
|
Glanzer S, Pulido SA, Tutz S, Wagner GE, Kriechbaum M, Gubensäk N, Trifunovic J, Dorn M, Fabian WMF, Novak P, Reidl J, Zangger K. Structural and functional implications of the interaction between macrolide antibiotics and bile acids. Chemistry 2015; 21:4350-8. [PMID: 25655041 PMCID: PMC4471570 DOI: 10.1002/chem.201406413] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Indexed: 01/13/2023]
Abstract
Macrolide antibiotics, such as azithromycin and erythromycin, are in widespread use for the treatment of bacterial infections. Macrolides are taken up and excreted mainly by bile. Additionally, they have been implicated in biliary system diseases and to modify the excretion of other drugs through bile. Despite mounting evidence for the interplay between macrolide antibiotics and bile acids, the molecular details of this interaction remain unknown. Herein, we show by NMR measurements that macrolides directly bind to bile acid micelles. The topology of this interaction has been determined by solvent paramagnetic relaxation enhancements (solvent PREs). The macrolides were found to be bound close to the surface of the micelle. Increasing hydrophobicity of both the macrolide and the bile acid strengthen this interaction. Both bile acid and macrolide molecules show similar solvent PREs across their whole structures, indicating that there are no preferred orientations of them in the bile micelle aggregates. The binding to bile aggregates does not impede macrolide antibiotics from targeting bacteria. In fact, the toxicity of azithromycin towards enterotoxic E. coli (ETEC) is even slightly increased in the presence of bile, as was shown by effective concentration (EC50 ) values.
Collapse
Affiliation(s)
| | | | - Sarah Tutz
- Institute of Molecular BiosciencesUniversity of Graz (Austria)
| | | | | | | | - Jovana Trifunovic
- Dept. of Pharmacology, Medical FacultyUniversity of Novi Sad (Serbia)
| | - Markus Dorn
- Institute of NavigationGraz University of Technology (Austria)
| | | | - Predrag Novak
- Department of Chemistry, Faculty of Natural ScienceUniversity of Zagreb (Croatia)
| | - Joachim Reidl
- Institute of Molecular BiosciencesUniversity of Graz (Austria)
| | | |
Collapse
|
12
|
The evidence for clonal spreading of quinolone resistance with a particular clonal complex of Campylobacter jejuni. Epidemiol Infect 2014; 142:2595-603. [PMID: 24534165 DOI: 10.1017/s0950268813003245] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Campylobacter is the most prevalent cause of bacterial gastroenteritis worldwide and it represents a significant public health risk of increasing severity due to its escalating resistance to clinically important quinolone and macrolide antibiotics. As a zoonotic pathogen Campylobacter is transmitted along the food chain and naturally cycles from environmental waters, feedstuff, animals and food to humans. We determined antibiotic resistance profiles, as well as multilocus sequence types and flaA-SVR types for 52 C. jejuni isolated in Slovenia from human, animal, raw and cured chicken meat and water samples. Twenty-eight different sequence types, arranged in ten clonal complexes, three new allele types and five new sequence types were identified, indicating the relatively high diversity in a small group of strains. The assignment of strains from different sources to the same clonal complexes indicates their transmission along the food supply chain. The most prevalent clonal complex was CC21, which was also the genetic group with 95% of quinolone-resistant strains. Based on the genetic relatedness of these quinolone-resistant strains identified by polymerase chain reaction with a mismatch amplification mutation assay and sequencing of the quinolone resistance-determining region of the gyrA gene, we conclude that the high resistance prevalence observed indicates the local clonal spread of quinolone resistance with CC21.
Collapse
|