scholarly journals Antibiotic resistance and plasmid analysis of Enterobacteriaceae isolated from retail meat in Lagos Nigeria

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Roseline Ekiomado Uzeh ◽  
Fadekemisola Adewumi ◽  
Bamidele Tolulope Odumosu
Keyword(s):  
Antimicrobial Agents ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Plasmid Copy ◽  
Alkaline Lysis ◽  
E Coli ◽  
Plasmid Analysis ◽  
Overall Resistance ◽  
Meat Samples ◽  
High Level

Abstract Background The presence of antibiotic resistant microorganisms in food is of great concern globally. This research was carried out to detect and characterize plasmid carriage and profiles among members of Enterobacteriaceae from different meat types in Nigeria. Method From a total of 80 meat samples comprising of mutton,pork, beef and chicken, organisms belonging to the family Enterobacteriaceae wereisolated by standard procedures and identified by API 20E system. Antibiotics susceptibilities testing (AST) againstselected classes of antimicrobial agents and plasmid extraction was carried outby disc diffusion and alkaline lysis methods respectively. Results One-hundred and ten Enterobacteriaceae were isolated,species identification revealed isolates belonging to 7 genera comprising of Escherichia, Enterobacter, Klebsiella,Citrobacter, Proteus, Salmonella and Serratia. Overall resistance of theorganisms to amoxycillin/clavulanic acid was 91 (82.7%), streptomycin 85(75.7%) and perfloxacin 74 (67.2%) while ofloxacin had the highestsusceptibility rate (91.8%). Plasmids profiling revealed ranges of plasmids from1 to 3 copies with estimated sizes range of 700bp to 1.1kb among E. coli, K. pneumoniae, E. aerogenesand Proteus mirabilis. All theisolates with plasmids were multidrug resistant and were isolated from chicken excepta strain of E. coli from pork whichharboured a single plasmid copy suggesting these meat as reservoirs forantibiotic resistant bacteria. Conclusion Our findings revealed high level of meat contamination with antibioticresistant Enterobacteriaceae harbouring resistant plasmids. An integratedsurveillance system and safety practice must be ensured among the processorsand retailers.

scholarly journals Antibiotic Resistance and Plasmid Analysis of Enterobacteriaceae Isolated From Retail Meat in Lagos Nigeria

2020 ◽  
Author(s):  
Roseline Ekiomado Uzeh ◽  
Bamidele Tolulope Odumosu ◽  
Fadekemisola Adewumi
Keyword(s):  
Antimicrobial Agents ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Plasmid Copy ◽  
Alkaline Lysis ◽  
Antibiotic Resistant ◽  
E Coli ◽  
Overall Resistance ◽  
Meat Samples ◽  
High Level

Abstract Background The presence of antibiotic resistant microorganisms in food is of great concern globally. This research was carried out to detect and characterize plasmid carriage and profiles among members of Enterobacteriaceae from different meat types in Nigeria. Method From a total of 80 meat samples comprising of mutton, pork, beef and chicken, organisms belonging to the family Enterobacteriaceae were isolated by standard procedures and identified by API 20E system. Antibiotics susceptibilities testing (AST) against selected classes of antimicrobial agents and plasmid extraction was carried out by disc diffusion and alkaline lysis methods respectively. Results One-hundred and ten Enterobacteriaceae were isolated, species identification revealed isolates belonging to 7 genera comprising of Escherichia, Enterobacter, Klebsiella, Citrobacter, Proteus, Salmonella and Serratia. Overall resistance of the organisms to amoxycillin/clavulanic acid was 91 (82.7%), streptomycin 85 (75.7%) and perfloxacin 74 (67.2%) while ofloxacin had the highest susceptibility rate (91.8%). Plasmids profiling revealed ranges of plasmids from 1 to 3 copies with estimated sizes range of 700bp to 1.1kb among E. coli, K. pneumoniae, E. aerogenes and Proteus mirabilis. All the isolates with plasmids were multidrug resistant and were isolated from chicken except a strain of E. coli from pork which harboured a single plasmid copy suggesting these meat as reservoirs for antibiotic resistant bacteria. Conclusion Our findings revealed high level of meat contamination with antibiotic resistant Enterobacteriaceae harbouring resistant plasmids. An integrated surveillance system and safety practice must be ensured among the processors and retailers

scholarly journals Antimicrobial Resistance of DiarrheagenicEscherichia coli Isolated from Children under the Age of 5 Years from Ifakara, Tanzania

1999 ◽  
Vol 43 (12) ◽  
pp. 3022-3024 ◽  
Author(s):  
Jordi Vila ◽  
Martha Vargas ◽  
Climent Casals ◽  
Honorato Urassa ◽  
Hassan Mshinda ◽  
...  
Keyword(s):  
Developing Countries ◽  
Public Health Problem ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Important Public Health Problem ◽  
Important Public Health ◽  
E Coli ◽  
High Level ◽  
Level Resistance ◽  
Children Under 5

ABSTRACT Diarrhea caused by multidrug-resistant bacteria is an important public health problem among children in developing countries. The prevalence and antimicrobial susceptibility of diarrheagenicEscherichia coli in 346 children under 5 years of age in Ifakara, Tanzania, were studied. Thirty-eight percent of the cases of diarrhea were due to multiresistant enterotoxigenic E. coli, enteroaggregative E. coli, or enteropathogenicE. coli. Strains of all three E. colicategories showed high-level resistance to ampicillin, tetracycline, co-trimoxazole, and chloramphenicol but were highly susceptible to quinolones. Guidelines for appropriate use of antibiotics in developing countries need updating.

scholarly journals Detection of Antibiotic-Resistant Bacteria, Resistance Determinants, and Mobile Elements in Surface Waters in Lebanon

2021 ◽  
Author(s):  
Jennifer Moussa ◽  
Edmond Abboud ◽  
Sima Tokajian
Keyword(s):  
Surface Water ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Population Mobility ◽  
Antibiotic Resistant Bacteria ◽  
Antibiotic Resistant ◽  
E Coli ◽  
Resistance Determinants ◽  
Bacterial Contaminants ◽  
Plasmid Analysis

AbstractThe prevalence of antibiotic-resistant bacteria in surface water in Lebanon is a growing concern and understanding the mechanisms of the spread of resistance determinants is essential. We aimed at studying the occurrence of resistant organisms and determinants in surface water sources in Lebanon and understanding their mobilization and transmission. Water samples were collected from five major rivers in Lebanon. 91 isolates were recovered out of which 25 were multidrug-resistant (MDR) and accordingly were further characterized. Escherichia coli and Klebsiella pneumoniae were the most commonly identified MDR isolates. Conjugation assays coupled with in silico plasmid analysis were performed and validated using PCR-based replicon typing (PBRT) to identify and confirm incompatibility groups and the localization of β-lactamase encoding genes. E. coli EC23 carried a blaNDM-5 gene on a conjugative, multireplicon plasmid, while blaCTX-M-15 and blaTEM-1B were detected in the majority of the MDR isolates. Different ST types were identified including the highly virulent E. coli ST131. Our results showed a common occurrence of bacterial contaminants in surface water and an increase in the risk for the dissemination of resistance determinants exacerbated with the ongoing intensified population mobility in Lebanon and the widespread lack of wastewater treatment.

scholarly journals Emergence of high multidrug-resistant Escherichia coli isolates from neonates with infection

2020 ◽  
Author(s):  
Dan Wu ◽  
Yijun Ding ◽  
Jinjing Zhang ◽  
Kaihu Yao ◽  
Wei Gao ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Multidrug Resistance ◽  
Clavulanic Acid ◽  
Antimicrobial Agents ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
E Coli ◽  
Mueller Hinton ◽  
Mueller Hinton Agar ◽  
Amoxicillin Clavulanic Acid

Abstract Background Escherichia coli (E.coli) rank one of the most common pathogens that can cause neonatal infections. The emergence of antibiotic-resistant bacteria is a major cause of treatment failure in newborn with infection. The purpose of this study was to describe the antibiotic resistance and multidrug-resistance of E.coli isolated from neonates with infection.Methods The antimicrobial susceptibility testing of the E. coli strains to selected antibiotics was assessed with the E-test technique on the Mueller-Hinton agar. The antimicrobials tests were included ceftazidime, cefuroxime, cefatriaxone, amoxicillin, amoxicillin-clavulanic acid, cefoperazone - sulbactam, meropenem, gentamicin, ciprofloxacin and sulfonamides. The minimal inhibitory concerntration (MIC) values of the antimicrobial agents selected for this study was determined by an agar dilution technique on Mueller-Hinton agar according to the Clinical and Laboratory Standards Institute recommendations. Results A total of 100 E. coli strains was isolated from phlegm (n = 78), blood (n = 10), cerebrospinal fluid (n = 5), and umbilical discharge (n = 7) of neonates hospitalized at Beijing Children’s Hospital. The highest resistance rate of E.coli was found in amoxicillin at 85%, followed by cefuroxime 65%, and cefatriaxone 60%, respectively. 6% and 5% of all isolates were resistant to amoxicillin/clavulanic acid and cefoperazone -sulbactam merely. The resistance rates to ceftazidime, gentamicin, ciprofloxacin and sulfonamides were 31%, 20%, 33%, 47%, respectively. All the isolates were susceptible to meropenem. Multidrug resistance was defined in E.coli as resistance to at least three antibiotic families. About 26% (26/100) of all the E.coli isolates were multidrug-resistant. The detection rate of ESBL-Producing E. coli was 55%. The rate in E. coli isolates from phlegm was higher than aseptic humoral. The difference was statistically significant (P < 0.05). It is worth noting that the majority of the isolates were also resistant to non-β-lactam antimicrobial agents, but the resistant rates were significantly lower than extended-spectrum β-lactamases.Conclusions: Multi-drug-resistant E.coli has become a thorny problem in clinical treatment. It is necessary to monitor E. coli resistance.

scholarly journals Design, Overproduction and Purification of the Chimeric Phage Lysin MLTphg Fighting against Staphylococcus aureus

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1587
Author(s):  
Feng Wang ◽  
Xiaohang Liu ◽  
Zhengyu Deng ◽  
Yao Zhang ◽  
Xinyu Ji ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Bacterial Infections ◽  
Antimicrobial Agents ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Antibiotic Resistant ◽  
E Coli ◽  
Conventional Antibiotics ◽  
Phage Lysin ◽  
Shed Light

With the increasing spread of multidrug-resistant bacterial pathogens, it is of great importance to develop alternatives to conventional antibiotics. Here, we report the generation of a chimeric phage lysin, MLTphg, which was assembled by joining the lysins derived from Meiothermus bacteriophage MMP7 and Thermus bacteriophage TSP4 with a flexible linker via chimeolysin engineering. As a potential antimicrobial agent, MLTphg can be obtained by overproduction in Escherichia coli BL21(DE3) cells and the following Ni-affinity chromatography. Finally, we recovered about 40 ± 1.9 mg of MLTphg from 1 L of the host E. coli BL21(DE3) culture. The purified MLTphg showed peak activity against Staphylococcus aureus ATCC6538 between 35 and 40 °C, and maintained approximately 44.5 ± 2.1% activity at room temperature (25 °C). Moreover, as a produced chimera, it exhibited considerably improved bactericidal activity against Staphylococcus aureus (2.9 ± 0.1 log10 reduction was observed upon 40 nM MLTphg treatment at 37 °C for 30 min) and also a group of antibiotic-resistant bacteria compared to its parental lysins, TSPphg and MMPphg. In the current age of growing antibiotic resistance, our results provide an engineering basis for developing phage lysins as novel antimicrobial agents and shed light on bacteriophage-based strategies to tackle bacterial infections.

scholarly journals 611. Fosfomycin Resistance of Multidrug-Resistant Escherichia coli and Mechanisms of Fosfomycin Resistance

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S285-S285
Author(s):  
Hyeri Seok ◽  
Ji Hoon Jeon ◽  
Hee Kyoung Choi ◽  
Won Suk Choi ◽  
Dae Won Park ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Agents ◽  
Multidrug Resistant ◽  
Resistance Rate ◽  
Coli Strain ◽  
Resistant Bacteria ◽  
E Coli ◽  
Broth Microdilution Method ◽  
Fosfomycin Resistance

Abstract Background Fosfomycin is one of the antibiotics that may be a candidate for the next-generation antimicrobial agents againt multidrug-resistant bacteria. To date, it is known that the resistance rate is not high for Escherichia coli. However, it is necessary to update the fosfomycin resistance rates in E. coli according to the studies that extended spectrum β-lactamase (ESBL) producing E. coli strains are highly resistance to fosfomycin. We evaluated the resistance rate of fosfomycin, the resistant mechanism of fosfomycin in E. coli, and the activity of fosfomycin against susceptible and resistant strains of E. coli. Methods A total of 283 clinical isolates was collected from patients with Escherichia coli species during the period of January 2018 to June 2018, in three tertiary hospitals of Republic of Korea. In vitro antimicrobial susceptibility tests were performed in all E. coli isolates using the broth microdilution method according to the Clinical and Laboratory Standard Institute (CLSI). Multilocus sequence typing (MLST) of the Oxford scheme was conducted to determine the genotypes of E. coli isolated. Fosfomycin genes were investigated for all fosfomycin-resistant E. coli strains. Results The overall resistance rate to fosfomycin was 10.2%, compared with 53.4%, 46.3%, 41.3%, 31.1%, 10.6%, 2.5%, and 2.1% for ciprofloxacin, cefixime, cefepime, piperacillin/tazobactam, colistin, ertapenem, and amikacin, respectively. The 29 fosfomycin-resistant isolates did not show a clonal pattern on the phylogenetic tree. MurA and glp genes were identified in all strains. FosA3 were identified in two strains and uhp gene were identified in 4 strains. In time-kill curve studies, fosfomycin was more bactericidal than cefixime against all sensitive E. coli strain. Morever, fosfomycin was more bactericidal than piperacillin/tazobactam against ESBL-producing E. coli strain. Conclusion The resistant rate of fosfomycin to E. coli is still low. Fosfomycin was active against E. coli including ESBL producing strains. Disclosures All authors: No reported disclosures.

scholarly journals Prevalence of Multidrug-ResistantEscherichia coliIsolated from Drinking Water Sources

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Stephen T. Odonkor ◽  
Kennedy K. Addo
Keyword(s):  
Antimicrobial Agents ◽  
Microbiological Quality ◽  
Multidrug Resistant ◽  
Poor Quality ◽  
Water Sources ◽  
Resistant Bacteria ◽  
Human Consumption ◽  
Isolation And Identification ◽  
E Coli ◽  
Risk Of Death

The control of infectious diseases is badly endangered by the rise in the number of microorganisms that are resistant to antimicrobial agents. This is because infections caused by resistant microorganisms often fail to respond to conventional treatment, resulting in prolonged illness and greater risk of death. Antimicrobial-resistant bacteria are also present in various water sources. This study therefore sought to document the microbiological quality and antibiograms of bacterial isolates (E. colistrains) from six different water sources in order to determine their safety for human consumption and to provide updated antibiotic data for pragmatic treatment of patients. Bacteria isolation and identification was done using API and conventional methods. Antibiotic susceptibility testing was conducted using the Kirby–Bauer method. Results obtained indicated that all the water sources tested were of poor quality. Bacteria isolated includedE. coli,Enterobacterspp.,Klebsiellaspp.,Salmonella typhi,Streptococcusspp.,Proteus vulgaris,Vibrio cholera,Shigellaspp.,Pseudomonas aeruginosa, andEnterococcus faecalis. The prevalence of multidrug-resistantE. coliwas 49.48%.E. coliisolates showed high resistance patterns to the tested antibiotics. They were most resistant to penicillin (32.99%), cefuroxime (28.87%), erythromycin (23.71%), and tetracycline (21.45%). In contrast, they were susceptible to nitrofurantoin (93.8%), cefotaxime and amikacin (91.75%), gentamicin (90.7%), nalidixic acid (89.65%), ciprofloxacin (74.2%), chloramphenicol (69.07%), pipemidic acid (65.97%), and cefuroxime (52.58%). Sixty-three percent (63%) of the multidrug-resistantE. colistrains recorded a multiple antibiotic resistance (MAR) index value >0.2. The susceptible antibiotics, especially the nitrofurantoin, are hence recommended in the practical treatment of waterborne bacterial diseases.

Molecular Characterization of Multidrug-Resistant Escherichia coli Isolates from Edible Offal in Korea

2019 ◽  
Vol 82 (7) ◽  
pp. 1183-1190
Author(s):  
SE HYUN SON ◽  
KWANG WON SEO ◽  
YEONG BIN KIM ◽  
HYE YOUNG JEON ◽  
EUN BI NOH ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Resistance ◽  
Virulence Genes ◽  
Antimicrobial Agents ◽  
Food Product ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
E Coli ◽  
Antimicrobial Resistance Genes ◽  
Class 1

ABSTRACT Edible offal, which is the nonmuscular part of the livestock, is a popular food product in many countries. However, it can be easily contaminated by bacteria, such as Escherichia coli, during slaughter and processing and regarded as a reservoir for transfer of antimicrobial-resistant bacteria to humans. This study aimed to investigate prevalence and characteristics of antimicrobial-resistant E. coli isolates from edible offal in Korea. A total of 320 chicken offal samples, 540 pig offal samples, and 560 cattle offal samples were collected. Among the 118 E. coli isolates obtained, resistance to at least one antimicrobial agent was revealed in 32 (100%), 46 (95.8%), and 26 (68.4%) isolates of chicken, pig, and cattle offals, respectively, with an overall prevalence of 88.1% (104 of 118). The isolates from chicken offal showed highest resistance to most antimicrobial agents, with the exception of higher ampicillin resistance for isolates from pig offal. In the distribution of antimicrobial resistance genes of 69 (58.5%) multidrug-resistant (MDR) E. coli, blaTEM-1 (97.1%), tetA (76.6%), sul2 (70.6%), and cmlA (57.4%) were most prevalent. Class 1 and class 2 integrons were detected in 82.6 and 2.9% of the MDR isolates, respectively. In total, seven virulence genes (eaeA, escV, astA, fimH, papC, sfa/focDE, and iucC) were also identified in the MDR isolates. The fimH gene was the most frequent (91.3%). Overall, 52 isolates from chicken (24 isolates, 96.0%), pig (16 isolates, 55.2%) and cattle (12 isolates, 80.0%) offals among MDR isolates were found to have some plasmid replicons. Frep (38 isolates) and FIB (27 isolates) replicons were more prevalent than other replicon types. The results suggest that edible offal can become a relevant reservoir of E. coli strains carrying various antimicrobial resistance and virulence genes. HIGHLIGHTS

scholarly journals Extended-spectrum beta-lactamase-producing strains among diarrhoeagenic Escherichia coli—prospective traveller study with literature review

2021 ◽  
Author(s):  
Anu Kantele ◽  
Tinja Lääveri
Keyword(s):  
Escherichia Coli ◽  
Literature Review ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Middle Income ◽  
Extended Spectrum Beta Lactamase ◽  
E Coli ◽  
Middle Income Countries ◽  
Overall Resistance ◽  
Esbl Producers

Abstract Background Antibiotics are no longer the primary approach for treating all travellers’ diarrhoea (TD): most cases resolve without antibiotics and using them predisposes to colonization by multidrug-resistant bacteria. Data are accumulating on increasing resistance among TD pathogens, yet research into the most common agents, diarrhoeagenic Escherichia coli (DEC), remains limited. Methods A total of 413 travellers to the (sub)tropics were analyzed for travel-acquired diarrhoeal pathogens and ESBL-PE. To identify ESBL-producing DEC, ESBL-producing E. coli (ESBL-EC) isolates were subjected to multiplex qPCR for various DEC pathotypes: enteroaggregative (EAEC), enteropathogenic (EPEC), enterotoxigenic (ETEC), enteroinvasive (EIEC) and enterohaemorrhagic (EHEC) E. coli. For a literature review, we screened studies among travellers and locals in low- and middle-income countries (LMICs) on the frequency of ESBL-producing DEC, and among travellers, also DEC with resistance to ciprofloxacin, azithromycin, and rifamycin derivatives. Results Our rate of ESBL-EC among all DEC findings was 2.7% (13/475); among EAEC 5.7% (10/175), EPEC 1.1% (2/180), ETEC 1.3% (1/80) and EHEC (0/35) or EIEC 0% (0/5). The literature search yielded three studies reporting ESBL-EC frequency and thirteen exploring resistance to TD antibiotics among travel-acquired DEC. For EAEC and ETEC, the ESBL-EC rates were 10–13% and 14–15%, resistance to fluoroquinolones 0–42% and 0–40%, azithromycin 0–29% and 0–61%, and rifaximin 0% and 0–20%. The highest rates were from the most recent collections. Proportions of ESBL-producing DEC also appear to be increasing among locals in LMICs and even carbapenemase-producing DEC were reported. Conclusion ESBL producers are no longer rare among DEC, and the overall resistance to various antibiotics is increasing. The data predict decreasing efficacy of antibiotic treatment, threatening its benefits, for disadvantages still prevail when efficacy is lost.

scholarly journals Tryptophan Silver Nanoparticles Synthesized by Photoreduction Method: Characterization and Determination of Bactericidal and Anti-Biofilm Activities on Resistant and Susceptible Bacteria

2019 ◽  
Vol 12 ◽  
pp. 117864691983167 ◽  
Author(s):  
Daniella dos Santos Courrol ◽  
Carla Regina Borges Lopes ◽  
Camila Bueno Pacheco Pereira ◽  
Marcia Regina Franzolin ◽  
Flávia Rodrigues de Oliveira Silva ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biofilm Formation ◽  
Antimicrobial Agents ◽  
Irradiation Time ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Bacterial Strains ◽  
Antibiotic Resistant ◽  
E Coli ◽  
Static Conditions

The high rates of antibiotics use in hospitals have resulted in a condition where multidrug-resistant pathogens have become a severe threat to the human health worldwide. Therefore, there is an increasing necessity to identify new antimicrobial agents that can inhibit the multidrug-resistant bacteria and biofilm formation. In this study, antibacterial and anti-biofilm activities of tryptophan silver nanoparticles (TrpAgNP) were investigated. The TrpAgNPs were synthesized by photoreduction method, and the influence of irradiation time and concentration of reagents were analyzed. The nanoparticles were characterized by transmission electron microscopy, Zeta Potential and (UV)-absorption spectra. The antibacterial activity of TrpAgNPs was tested for antibiotic-resistant and susceptible pathogens, Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Citrobacter freundii, Klebsiella pneumoniae, Salmonella typhimurium, and Pseudomonas aeruginosa, evaluating the influence of photoreduction parameters in bactericidal effect. The results have shown that TrpAgNPs solutions with lower tryptophan/silver nitrate (AgNO3) ratio and higher AgNO3 concentration have higher bactericidal action against bacteria with inhibition of ~100% in almost all studied bacterial strains. The antimicrobial activity of TrpAgNPs within biofilms generated under static conditions of antibiotic-resistant and susceptible strains of S. aureus, S. epidermidis, E. coli, K. pneumoniae, C. freundii, and P. aeruginosa was also investigated. The results showed that TrpAgNPs have an inhibitory effect against biofilm formation, exceeding 50% in the case of Gram-negative bacteria ( E. coli, K. pneumoniae, C. freundii, and P. aeruginosa—54.8% to 98.8%). For Gram-positive species, an inhibition of biofilm formation of 68.7% to 72.2 % was observed for S. aureus and 20.0% to 40.2% for S. epidermidis.

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