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Angulo-Zamudio UA, Flores-Villaseñor H, Leon-Sicairos N, Zazueta-Armenta D, Martínez-Villa FA, Tapia-Pastrana G, Angulo-Rocha J, Murillo-Llanes J, Barajas-Olivas MF, Canizalez-Roman A. Virulence-associated genes and antimicrobial resistance patterns in bacteria isolated from pregnant and nonpregnant women with urinary tract infections: the risk of neonatal sepsis. Can J Microbiol 2023; 69:488-500. [PMID: 37815047 DOI: 10.1139/cjm-2023-0046] [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] [Indexed: 10/11/2023]
Abstract
Uropathogenic Escherichia coli (UPEC) is classified as the major causative agent of urinary tract infections (UTIs). UPEC virulence and antibiotic resistance can lead to complications in pregnant women and (or) newborns. Therefore, the aim of this study was to determine the etiological agents of UTIs, as well as to identify genes related to virulence factors in bacteria isolated from pregnant and nonpregnant women. A total of 4506 urine samples were collected from pregnant and nonpregnant women. Urine cultures were performed, and PCR was used to identify phylogroups and virulence-related genes. Antibiotic resistance profiles were determined. The incidence of UTIs was 6.9% (pregnant women, n = 206 and nonpregnant women, n = 57), and UPEC belonging to phylogroup A was the most prevalent. The presence of genes related to capsular protection, adhesins, iron acquisition, and serum protection in UPEC was associated with not being pregnant, while the presence of genes related to adhesins was associated with pregnancy. Bacteria isolated from nonpregnant women were more resistant to antibiotics; 36.5% were multidrug resistant, and 34.9% were extensively drug resistant. Finally, UTIs were associated with neonatal sepsis risk, particularly in pregnant women who underwent cesarean section while having a UTI caused by E. coli. In conclusion, UPEC isolated from nonpregnant women carried more virulence factors than those isolated from pregnant women, and maternal UTIs were associated with neonatal sepsis risk.
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Affiliation(s)
| | - Hector Flores-Villaseñor
- School of Medicine, Autonomous University of Sinaloa, 80246 Culiacan Sinaloa, Mexico
- The Sinaloa State Public Health Laboratory, Secretariat of Health, 80200 Culiacan Sinaloa, Mexico
| | - Nidia Leon-Sicairos
- School of Medicine, Autonomous University of Sinaloa, 80246 Culiacan Sinaloa, Mexico
- Pediatric Hospital of Sinaloa, 80200 Culiacan Sinaloa, Mexico
| | - Dina Zazueta-Armenta
- School of Medicine, Autonomous University of Sinaloa, 80246 Culiacan Sinaloa, Mexico
- The Women's Hospital, Secretariat of Health, 80127 Culiacan Sinaloa, Mexico
| | | | - Gabriela Tapia-Pastrana
- Laboratorio de Investigación Biomédica, Hospital Regional de Alta Especialidad de Oaxaca, 71256 Oaxaca, Mexico
| | - Jorge Angulo-Rocha
- The Women's Hospital, Secretariat of Health, 80127 Culiacan Sinaloa, Mexico
| | | | | | - Adrian Canizalez-Roman
- School of Medicine, Autonomous University of Sinaloa, 80246 Culiacan Sinaloa, Mexico
- The Women's Hospital, Secretariat of Health, 80127 Culiacan Sinaloa, Mexico
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Virulence Profile, Antibiotic Resistance, and Phylogenetic Relationships among Escherichia coli Strains Isolated from the Feces and Urine of Hospitalized Patients. Pathogens 2022; 11:pathogens11121528. [PMID: 36558862 PMCID: PMC9782660 DOI: 10.3390/pathogens11121528] [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: 11/16/2022] [Revised: 12/04/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Extra-intestinal pathogenic Escherichia coli (ExPEC) may inhabit the human gut microbiota without causing disease. However, if they reach extra-intestinal sites, common cystitis to bloodstream infections may occur, putting patients at risk. To examine the human gut as a source of endogenous infections, we evaluated the E. coli clonal diversity of 18 inpatients' guts and their relationship with strains isolated from urinary tract infection (UTI) in the same hospital. Random amplified polymorphic DNA evaluated the clonal diversity, and the antimicrobial susceptibility was determined by disk diffusion. One isolate of each clone detected was sequenced, and their virulome and resistome were determined. Overall, 177 isolates were screened, among which 32 clones were identified (mean of two clones per patient), with ExPEC strains found in over 75% of the inpatients' guts. Endogenous infection was confirmed in 75% of the cases. ST10, ST59, ST69, ST131, and ST1193 clones and critical mobile drug-resistance encoding genes (blaCTX-M-15, blaOXA-1, blaDHA-1, aac(6')-lb-cr, mcr-1.26, qnrB4, and qnrB19) were identified in the gut of inpatients. The genomic analysis highlighted the diversity of the fecal strains, colonization by lactose-negative E. coli, the high frequency of ExPEC in the gut of inpatients without infections, and the presence of β-lactamase producing E. coli in the gut of inpatients regardless of the previous antibiotics' usage. Considering that we found more than one ExPEC clone in the gut of several inpatients, surveillance of inpatients' fecal pathogens may prevent UTI caused by E. coli in the hospital and dissemination of risk clones.
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Santos ACDM, Fuga B, Esposito F, Cardoso B, Santos FF, Valiatti TB, Santos-Neto JF, Gales AC, Lincopan N, Silva RM, Gomes TAT. Unveiling the Virulent Genotype and Unusual Biochemical Behavior of Escherichia coli ST59. Appl Environ Microbiol 2021; 87:e0074321. [PMID: 34085857 PMCID: PMC8315172 DOI: 10.1128/aem.00743-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/26/2021] [Indexed: 12/19/2022] Open
Abstract
Extraintestinal pathogenic Escherichia coli (ExPEC) is a leading cause of human and animal infections worldwide. The utilization of selective and differential media to facilitate the isolation and identification of E. coli from complex samples, such as water, food, sediment, and gut tissue, is common in epidemiological studies. During a surveillance study, we identified an E. coli strain isolated from human blood culture that displayed atypical light cream-colored colonies in chromogenic agar and was unable to produce β-glucuronidase and β-galactosidase in biochemical tests. Genomic analysis showed that the strain belongs to sequence type 59 (ST59) and phylogroup F. The evaluation in silico of 104 available sequenced lineages of ST59 complex showed that most of them belong to serotype O1:K1:H7, are β-glucuronidase negative, and harbor a virulent genotype associated with the presence of important virulence markers such as pap, kpsE, chuA, fyuA, and yfcV. Most of them were isolated from extraintestinal human infections in diverse countries worldwide and could be clustered/subgrouped based on papAF allele analysis. Considering that all analyzed strains harbor a virulent genotype and most do not exhibit biochemical behavior typical of E. coli, we report that they could be misclassified or underestimated, especially in epidemiological studies where the screening criteria rely only on typical biochemical phenotypes, as happens when chromogenic media are used. IMPORTANCE The use of selective and differential media guides presumptive bacterial identification based on specific metabolic traits that are specific to each bacterial species. When a bacterial specimen displays an unusual phenotype in these media, this characteristic may lead to bacterial misidentification or a significant delay in its identification, putting a patient at risk depending on the infection type. In the present work, we describe a virulent E. coli sequence type (ST59) that does not produce beta-glucuronidase (GUS negative), production of which is the metabolic trait widely used for E. coli presumptive identification in diverse differential media. The recognition of this unusual metabolic trait may help in the proper identification of ST59 isolates, the identification of their reservoir, and the evaluation of the frequency of these pathogens in places where automatic identification methods are not available.
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Affiliation(s)
- Ana Carolina de Mello Santos
- Disciplina de Microbiologia, Departamento de Microbiologia Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Bruna Fuga
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Fernanda Esposito
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Brenda Cardoso
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Fernanda Fernandes Santos
- Laboratório ALERTA, Disciplina de Infectologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Tiago Barcelos Valiatti
- Laboratório ALERTA, Disciplina de Infectologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - José Francisco Santos-Neto
- Disciplina de Microbiologia, Departamento de Microbiologia Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Ana Cristina Gales
- Laboratório ALERTA, Disciplina de Infectologia, Departamento de Medicina, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Nilton Lincopan
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Rosa Maria Silva
- Disciplina de Microbiologia, Departamento de Microbiologia Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Tânia Aparecida Tardelli Gomes
- Disciplina de Microbiologia, Departamento de Microbiologia Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
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Kürekci C, Aydın M, Tekeli İO, Ambarcıoğlu P, Şengül SA, Sakin F. Occurrence and characterization of ciprofloxacin‐resistant
Escherichia coli
from bovine and ovine bulk tank milk samples in Turkey. J Food Saf 2021. [DOI: 10.1111/jfs.12881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Cemil Kürekci
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine Mustafa Kemal University Antakya Hatay Turkey
| | - Muhsin Aydın
- Department of Biology, Faculty of Science and Letters Adıyaman University Adıyaman Turkey
| | - İbrahim Ozan Tekeli
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine Mustafa Kemal University Antakya Hatay Turkey
| | - Pınar Ambarcıoğlu
- Department of Biostatistics, Faculty of Veterinary Medicine Mustafa Kemal University Antakya Hatay Turkey
| | - Seydi Ahmet Şengül
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine Mustafa Kemal University Antakya Hatay Turkey
| | - Fatih Sakin
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine Mustafa Kemal University Antakya Hatay Turkey
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Siqueira FM, De Carli S, Lopes CE, Machado L, Vieira TR, Pöppl ÁG, Cardoso MRI, Zaha A. Non-lactose-fermenting uropathogenic Escherichia coli from dogs: virulence profile characterization. Lett Appl Microbiol 2021; 72:596-603. [PMID: 33524173 DOI: 10.1111/lam.13454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 11/30/2022]
Abstract
Non-lactose-fermenting Escherichia coli (NLFEC) has a few descriptive studies restricted to human infections. In the present study, isolates of NLFEC obtained from urine samples of dogs with hyperadrenocorticism were characterized regarding their virulence ability, biofilm formation capacity and antimicrobial susceptibility profile. Escherichia coli lactose-fermenting strains from urinary infection in dogs with the same conditions were analysed to provide comparisons. The non-lactose-fermenting E. coli strains were classified as belonging to clade I E. coli, whereas the lactose-fermenting strains were classified in phylogroup B2. All strains presented virulence markers to adhesion, iron acquisition, toxins, colicin and cytotoxin production, and biofilm regulation. Components of the extracellular matrix in addition to the in vitro biofilm formation ability were observed in the strains. Multidrug resistance (MDR) profiles were observed by in vitro susceptibility tests to all NLFEC strains. In summary, non-lactose-fermenting uropathogenic E. coli from dogs behaves similar to lactose-fermenting E. coli, exhibiting MDR profile, and pathogenic potential of promote animal infections.
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Affiliation(s)
- F M Siqueira
- Laboratory of Veterinary Bacteriology, Faculty of Veterinary Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - S De Carli
- Laboratory of Veterinary Bacteriology, Faculty of Veterinary Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - C E Lopes
- Laboratory of Veterinary Bacteriology, Faculty of Veterinary Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - L Machado
- Veterinary Clinical Hospital, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - T R Vieira
- Laboratory of Veterinary Preventive Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Á G Pöppl
- Veterinary Clinical Hospital, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - M R I Cardoso
- Laboratory of Veterinary Preventive Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - A Zaha
- Center of Biotechnology, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Gajdács M, Ábrók M, Lázár A, Burián K. Differential epidemiology and antibiotic resistance of lactose-fermenting and non-fermenting Escherichia coli: Is it just a matter of taste? Biol Futur 2020; 71:175-182. [PMID: 34554531 DOI: 10.1007/s42977-020-00016-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 05/20/2020] [Indexed: 02/01/2023]
Abstract
Urinary tract infections (UTIs) are some of the most common infections affecting humans worldwide. Occurrence of atypical, lactose non-fermenting, biochemically "inactive" strains of E. coli in clinical material has been described in the literature, which may cause a significant diagnostic challenge. The present retrospective microbiological study was carried out using isolates and data collected between January 1, 2013, and December 31, 2017, at the Institute of Clinical Microbiology. n = 24,285 positive urine samples were noted during the study period, out of which, samples positive for either lac + and lac- E. coli were included in the analysis. E. coli represented n = 7075 (55.8% ± 4.6%) of outpatient and n = 4916 (42.4% ± 3.6%) of inpatient isolates. n = 401 (3.3%; 80.2 ± 14.6/year) lac- E. coli isolates were identified from urinary tract infections. The ratio of lac- E. coli isolates was significantly higher in outpatient samples (262 vs. 139). Resistance levels of lac- isolates for antibiotics commonly used for treating UTIs were significantly higher for both inpatient and outpatient isolates: norfloxacin, ciprofloxacin, fosfomycin and nitrofurantoin. It is essential to pay attention to the presence of lac- strains, and their omission from clinical material during diagnostic procedures may have significant consequences for epidemiological studies and therapy.
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Affiliation(s)
- Márió Gajdács
- Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, Eötvös Utca 6., Szeged, 6720, Hungary.
| | - Marianna Ábrók
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, Semmelweis utca 6., Szeged, 6725, Hungary
| | - Andrea Lázár
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, Semmelweis utca 6., Szeged, 6725, Hungary
| | - Katalin Burián
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, Semmelweis utca 6., Szeged, 6725, Hungary.,Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged, Dóm tér 10., Szeged, 6720, Hungary
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Khazaei Z, Ghorbani P, Namaei MH, Rezaei Y, Yousefi M. Prevalence of Escherichia coli K1 Rectovaginal Colonization Among Pregnant Women in Iran: Virulence Factors and Antibiotic Resistance Properties. Microb Drug Resist 2020; 26:1201-1207. [PMID: 32354254 DOI: 10.1089/mdr.2020.0006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Neonatal invasive infections caused by Escherichia coli K1 are still major health problems and effective preventive strategies at the maternal level can be a concern. The aim of this study was to determine the prevalence of rectovaginal colonization, related risk factors, virulence factors, and antibiotic resistance properties of E. coli K1 among pregnant women. In this cross-sectional study, vaginal and rectal swabs were collected from 400 pregnant women. The identification of E. coli isolates was performed by microbiological tests. A polymerase chain reaction (PCR) assay was used to identify the E. coli K1 strains. The antimicrobial susceptibility patterns were determined by the Kirby-Bauer disk diffusion. Two duplex PCR assays were developed separately to detect genes encoding virulence determinants (fimH, hlyF, ibeA, and iucC) in the E. coli strains. The vaginal and rectal maternal E. coli K1 colonization rates were 3.7% and 19.25%, respectively. There is no significant association between demographic-obstetric factors and vaginal E. coli colonization in pregnant women. The most effective antibiotics against E. coli K1 strains were imipenem, gentamycin, ciprofloxacin, and ceftazidime. In our study, the E. coli K1 strains were significantly more likely to possess the fimH (90.9% vs. 60.7%) and iucC (90.9% vs. 53.6%) than the E. coli non-K1 strains. This study demonstrates that E. coli K1 seems to be more virulent than non-K1 strains. Our findings highlight the importance of screening pregnant women for vaginal colonization by E. coli K1 and of the appropriate antibiotic prophylaxis for the prevention of early-onset E. coli neonatal infection and comorbidity.
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Affiliation(s)
- Zohreh Khazaei
- Department of Gynecology, Birjand University of Medical Sciences, Birjand, Iran
| | - Parvin Ghorbani
- Faulty of Medicine, and Birjand University of Medical Sciences, Birjand, Iran
| | - Mohammad Hasan Namaei
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Yasaman Rezaei
- Faulty of Medicine, and Birjand University of Medical Sciences, Birjand, Iran
| | - Masoud Yousefi
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
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Occurrence of risk factors and antimicrobial resistance due to genes encoding extended–spectrum β-lactamase (ESBL) – and/or AmpC β-lactamase–producing Escherichia coli isolated from the hospitalised patients. Biologia (Bratisl) 2018. [DOI: 10.2478/s11756-018-00167-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Virulence-associated genes and antibiotic susceptibility among vaginal and rectal Escherichia coli isolates from healthy pregnant women in Poland. Folia Microbiol (Praha) 2018; 63:637-643. [PMID: 29644511 PMCID: PMC6097025 DOI: 10.1007/s12223-018-0598-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 03/08/2018] [Indexed: 11/22/2022]
Abstract
Vaginal and/or rectal Escherichia coli colonization of pregnant women is sometimes associated with neonatal infections. Despite the relevance of these strains, they have been rarely described before. Thus, the aim of this study was to compare vaginal (VEC) and rectal E. coli (REC) isolates in respect of antimicrobial susceptibility and the frequency of virulence-associated genes (VAGs). The antimicrobial susceptibility of 50 VEC and 50 REC isolates was performed by using the disc diffusion method, and VAGs were detected by PCR. There were no significant differences in the antimicrobial resistance between VEC and REC. Both VEC and REC isolates were mostly resistant to ticarcillin (36 and 30%) and ampicillin (36 and 22%). None of the tested isolates was positive for ESBL. Gene’s fimH, fimA, sfa/foc, iutA, ibeA, hlyF, and neuC were detected, respectively, in 98, 92, 32, 28, 12, 8, and 2% of VEC and in 94, 72, 12, 34, 8, 10, and 8% of REC isolates. The co-occurrence of fimA/H and sfa/foc genes was significantly more prevalent among VEC isolates, in comparison to REC isolates. The study indicated that VEC and REC isolates are quite similar in terms of antimicrobial non-susceptibility and VAGs.
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