1
|
Qasemi A, Rahimi F, Katouli M. Clonal groups of extended-spectrum β-lactamase and biofilm producing uropathogenic Escherichia coli in Iran. Pathog Glob Health 2022; 116:485-497. [PMID: 34904540 PMCID: PMC9639551 DOI: 10.1080/20477724.2021.2011578] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Pathogenicity of a bacterium is affected by the social characteristics of the population and environmental factors. The ability of biofilm formation among β-lactamase-producing uropathogenic Escherichia coli (UPEC) could facilitate the exchange of antibiotic-resistance genes, which resulted in widespread dissemination of antibacterial drug resistance. We investigated the prevalence of biofilm and β-lactamase producing UPECs among patients with urinary tract infection (UTI) in two cities with different demographics and climates in Iran. A total of 265 E. coli was isolated from patients with UTIs from two referral hospitals (n = 191) and two outpatient clinics (n = 74) in Isfahan and Zahedan, Iran. Production of curli and cellulose, and, biofilm formation was investigated using Congo red agar and microtiter plate methods, respectively. Biofilm producing (BFP) isolates (n = 107) were further characterized using rep-PCR, antimicrobial susceptibility testing and extended-spectrum β-lactamase (ESBL)/AmpC phenotypic production. Isolates were also screened for the presence of carbapenemase, ESBL and AmpC genes using multiplex PCR. High diversity was found among BFP strains in both cities, with 58% strains producing ESBL and 21% producing AmpC. ESBL (98%), AmpC (50%) and carbapenemase genes (40%) were identified in BFP strains with ESBL-positive phenotype, respectively. The prevalence of BFP strains, antibiotic resistance and β-lactamase genes in Zahedan, a low socioeconomic city with a warm climate, was significantly higher than that of Isfahan. High prevalence of biofilm and β-lactamase producing UPEC strains among strains from Zahedan suggests that socioeconomic status and environmental factors might have a role in pathogenicity of the strains.
Collapse
Affiliation(s)
- Ali Qasemi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Fateh Rahimi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran,CONTACT Fateh Rahimi ; Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Hezarjarib St., Isfahan, Iran
| | - Mohammad Katouli
- Genecology Research Center and School of Science, Technology and Education,University of the Sunshine Coast, Queensland, Australia
| |
Collapse
|
2
|
Zangane Matin F, Rezatofighi SE, Roayaei Ardakani M, Akhoond MR, Mahmoodi F. Virulence characterization and clonal analysis of uropathogenic Escherichia coli metallo-beta-lactamase-producing isolates. Ann Clin Microbiol Antimicrob 2021; 20:50. [PMID: 34344363 PMCID: PMC8336094 DOI: 10.1186/s12941-021-00457-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 07/26/2021] [Indexed: 11/29/2022] Open
Abstract
Background Uropathogenic Escherichia coli (UPEC) is a major cause of urinary tract infection (UTI); however, treatment of UTI has been challenging due to increased antimicrobial resistance (AMR). One of the most important types of AMR is carbapenem resistance (CR). CR bacteria are known as an important threat to global public health today. Class B metallo-beta-lactamases (MBLs) are one of the major factors for resistance against carbapenems. We aimed to investigate the characteristics of UPEC isolates producing MBL. Methods A cross-sectional study was conducted from October 2018 to December 2019 in Ahvaz; Iran. UPEC isolates were identified by biochemical and molecular methods. Metallo-beta-lactamase-producing isolates were detected using modified carbapenem inactivation method (mCIM) and EDTA-CIM (eCIM) tests. MBL genes, phylogenetic group, and virulence genes profile of carbapenem resistant isolates were determined. Conjugation assay and plasmid profiling were conducted to evaluate the ability of transferring of CR to other E. coli isolates. Clonal similarity of isolates were assessed using Enterobacterial intergenic repetitive element sequence (ERIC)-PCR. Results Among 406 UPEC isolates, 12 (2.95%) carbapenem-resistant were detected of which 11 were phenotypically MBL-producing strains. Four isolates were resistant to all investigated antimicrobial agents and were considered possible pandrug-resistant (PDR). blaNDM, blaOXA-48, blaIMP-1, and blaIMP-2 genes were found in 9, 5, 1, and 1 isolates, respectively. Among 30 virulence genes investigated, the traT, fyuA followed by fimH, and iutA with the frequency of 8 (66.7%), 8 (66.7%), 7 (58.3%), and 7 (58.3%) were the most identified genes, respectively. Siderophore production was the main virulence trait among carbapenem-resistant UPEC isolates. Except for two, all other isolates showed weak to moderate virulence index. In all recovered isolates, CR was readily transmitted via plasmids to other isolates during conjugation experiments. Conclusion MBL and carbapenemase genes, especially blaNDM and blaOXA-48 are spreading rapidly among bacteria, which can be a threat to global public health. Therefore monitoring the emergence and dissemination of new AMR is necessary to continuously refine guidelines for empiric antimicrobial therapy. Understanding the mechanisms of resistance and virulence in this group of bacteria can play an effective role in providing new therapeutic methods.
Collapse
Affiliation(s)
- Fatemeh Zangane Matin
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, 6135743135, Ahvaz, Iran
| | - Seyedeh Elham Rezatofighi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, 6135743135, Ahvaz, Iran.
| | - Mohammad Roayaei Ardakani
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, 6135743135, Ahvaz, Iran
| | - Mohammad Reza Akhoond
- Mathematical Sciences and Computer Faculty, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Fahimeh Mahmoodi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, 6135743135, Ahvaz, Iran
| |
Collapse
|
3
|
Habibollah-Pourzereshki N, Peymani A, Keshavarz-Saleh F. The Emergence of Quaternary Ammonium Compounds Resistance in Escherichia coli Isolated from Hospitals of Qazvin, Iran. Infect Disord Drug Targets 2021; 20:455-460. [PMID: 31595855 DOI: 10.2174/1871526519666191009145825] [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: 02/13/2019] [Revised: 09/21/2019] [Accepted: 09/23/2019] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Escherichia coli is one of the most important agents involved in healthcare-associated infection, and resistance to quantum ammonium compounds (QACs) has become a major challenge for infection control practitioners. The aim of the current study was to determine the frequency of qacE and qacEΔ1 genes in E. coli isolated from hospitalized patients in Qazvin, Iran. MATERIAL AND METHODS In the current cross-sectional study, 102 E. coli were collected from hospitals of Qazvin. All bacterial isolates were identified using standard laboratory methods and the antimicrobial susceptibility was evaluated by Kirby-Baer test. The presence of qacE and qacEΔ1 genes was investigated using polymerase chain reaction (PCR) technique. RESULTS In this study, 65 (63.7%) isolates showed a multidrug resistance (MDR) pattern which was resistant to at least three classes of antimicrobials including ß-lactams, aminoglycosides, and fluoroquinolones. The highest rates of resistance were observed against cefotaxime (75.5%) and nalidixic acid (66.7%). The PCR showed that 5 (4.9%) isolates harbored qacE gene, 62 (60.8%) isolates qacEΔ1, and 10 (9.8%) isolates carried both genes, simultaneously. There was a significant relationship between the QACs resistance and MDR pattern (P=0.03). CONCLUSION This study indicated a significant resistance rate against disinfectant compounds in the studied hospitals. However, more attention should be paid to this critical issue in the infection control committees of the hospitals.
Collapse
Affiliation(s)
| | - Amir Peymani
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | | |
Collapse
|
4
|
Karki R, Lamichhane S, Basnet BB, Dahal A, Awal BK, Mishra SK. In vitro Antimicrobial Synergy Testing of Extensively Drug-Resistant Clinical Isolates at an Organ Transplant Center in Nepal. Infect Drug Resist 2021; 14:1669-1677. [PMID: 33958879 PMCID: PMC8096450 DOI: 10.2147/idr.s309531] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 04/15/2021] [Indexed: 01/17/2023] Open
Abstract
Purpose Inappropriate use of broad-spectrum antibiotics contributes to the emergence of multidrug-resistant (MDR) bacteria. Finding novel antimicrobial agents and strategies based on synergistic combinations are essential to combat MDR infections. This study was designed to determine in vitro synergy of different antimicrobials against extensively drug-resistant (XDR) Gram-negative clinical isolates. Methods A descriptive, cross-sectional study was conducted at Human Organ Transplant Center, Nepal, for five months. Clinical isolates were checked for their drug-resistance properties including extended-spectrum beta-lactamase- (ESBL-) and metallo-beta-lactamase- (MBL-) production. The XDR isolates were further tested for antimicrobial synergy, and the results were interpreted as synergistic, additive, indifferent or antagonistic determining fractional inhibitory concentration of the antibiotics. Results Out of total 1155 clinical samples, 308 showed significant growth. Escherichia coli was the most common isolate (n=142) followed by Klebsiella pneumoniae, Acinetobacter calcoaceticus baumannii (Acb) complex, Pseudomonas aeruginosa and miscellaneous bacteria. Out of the culture positive isolates, 21.4% were MDR and 10.06% were XDR. The XDR population comprised K. pneumoniae (18.42%), E. coli (9.86%), Acb complex (7.41%) and P. aeruginosa (4.17%). Among the culture positive isolates, 4.5% and 5.8% were ESBL- and MBL-producers, respectively. Colistin, polymyxin B, and tigecycline were the antibiotics effective in majority of MDR isolates as compared to carbapenems. The combination of antibiotics - meropenem and colistin showed the highest proportion of "synergy" among all XDR E. coli whereas the combination of amikacin and colistin showed synergistic effect in XDR K. pneumoniae. Conclusion A significant proportion of isolates were MDR among which a large fraction was XDR. The combination of meropenem, amikacin and colistin with one another in pair showed beneficial activity in vitro. Such combinations can be utilized as effective therapy for XDR infections. Further studies are required to confirm these findings, and accordingly treatment protocols should be developed in the management of such infections.
Collapse
Affiliation(s)
- Rashmi Karki
- Janamaitri Foundation Institute of Health Sciences, Tribhuvan University, Nepal.,National Public Health Laboratory, Kathmandu, Nepal
| | - Samir Lamichhane
- Department of Pharmacology, Maharajgunj Medical Campus, Institute of Medicine, Tribhuvan University, Nepal
| | | | - Anuja Dahal
- Department of Pharmacy, Maharajgunj Medical Campus, Institute of Medicine, Tribhuvan University, Nepal
| | - Bal Krishna Awal
- National Public Health Laboratory, Kathmandu, Nepal.,Shahid Dharmabhakta National Transplant Center, Bhaktapur, Nepal
| | - Shyam Kumar Mishra
- School of Optometry and Vision Science, Faculty of Medicine and Health, UNSW, Sydney, NSW, Australia.,Department of Microbiology, Maharajgunj Medical Campus, Institute of Medicine, Tribhuvan University, Nepal
| |
Collapse
|
5
|
Nasiri MJ, Mirsaeidi M, Mousavi SMJ, Arshadi M, Fardsanei F, Deihim B, Davoudabadi S, Zamani S, Hajikhani B, Goudarzi H, Goudarzi M, Seghatoleslami ZS, Dabiri H, Tabarsi P. Prevalence and Mechanisms of Carbapenem Resistance in Klebsiella pneumoniae and Escherichia coli: A Systematic Review and Meta-Analysis of Cross-Sectional Studies from Iran. Microb Drug Resist 2020; 26:1491-1502. [DOI: 10.1089/mdr.2019.0440] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Mohammad Javad Nasiri
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Mirsaeidi
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | | | - Mania Arshadi
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Fatemeh Fardsanei
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Behnaz Deihim
- Department of Bacteriology and Virology, School of Medicine, Dezful University of Medical Sciences, Dezful, Iran
| | - Sara Davoudabadi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samin Zamani
- Infectious Diseases Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Bahareh Hajikhani
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hossein Goudarzi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Goudarzi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Sadat Seghatoleslami
- Department of Infectious Diseases, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Hossein Dabiri
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Payam Tabarsi
- Clinical TB and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
6
|
Vakilzadeh MM, Heidari A, Mehri A, Shirazinia M, Sheybani F, Aryan E, Naderi H, Najaf Najafi M, Varzandeh M. Antimicrobial Resistance among Community-Acquired Uropathogens in Mashhad, Iran. JOURNAL OF ENVIRONMENTAL AND PUBLIC HEALTH 2020; 2020:3439497. [PMID: 33082791 PMCID: PMC7556082 DOI: 10.1155/2020/3439497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 09/10/2020] [Accepted: 09/21/2020] [Indexed: 11/18/2022]
Abstract
Background Antimicrobial resistance among community-acquired uropathogens is an emerging concern over the past decades that warrants a continuing reevaluation of the appropriateness of recommended empiric antimicrobial regimens for treatment of urinary tract infections (UTIs). Aims To describe the microbial spectrum and resistance profile of community-acquired uropathogens and predictors of isolation of resistant strains. Methods Between October 2017 and June 2019, individuals who visited the outpatient clinics for diagnosis of UTIs or screening of asymptomatic bacteriuria were included in the study if they were tested for urine culture in one of the three main medical diagnostic laboratories of Mashhad, Iran. The standard disk diffusion antimicrobial susceptibility testing was used, with the Clinical and Laboratory Standards Institute (CLSI) threshold cutoffs for susceptibility of isolated uropathogens. Results Three hundred thirty cases were included with a median age of 47 years. Two hundred seventy-six (83.6%) were female. The most common isolated uropathogens were Escherichia coli in 201 (60.9%) cases and Klebsiella species in 46 (13.9%) cases. E. coli isolates showed the highest rates of susceptibility to nitrofurantoin (89.3%), cefixime (75%), and gentamicin (72.4%). Exposure to antibiotics in the past 3 months was a predictor of resistance to ciprofloxacin (OR: 2.8, 95% CI: 1.33-6.28), and older age was a predictor of resistance to TMP-SMX (OR: 2.1, 95% CI: 1.07-3.97) among E. coli isolates. Conclusion. E. coli and Klebsiella species accounted for about two-thirds of community-acquired uropathogens. In regard to the high susceptibility rates, nitrofurantoin was identified as the first-choice agent for empiric treatment of community-acquired cystitis, while cefixime and gentamicin might be the second-choice alternatives. Ciprofloxacin and TMP-SMX, on the other hand, cannot be considered appropriate agents for empiric therapy of community-acquired UTIs, particularly in those who had exposure to antibiotics in the past 3 months and the elderly.
Collapse
Affiliation(s)
| | | | - Ali Mehri
- Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Matin Shirazinia
- Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fereshte Sheybani
- Department of Infectious Diseases and Tropical Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Clinical Research Unit, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ehsan Aryan
- Antimicrobial Resistance Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - HamidReza Naderi
- Department of Infectious Diseases and Tropical Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mona Najaf Najafi
- Clinical Research Unit, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Marjan Varzandeh
- Department of Infectious Diseases and Tropical Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| |
Collapse
|
7
|
Jamali S, Tavakoly T, Mojtahedi A, Shenagari M. The Phylogenetic Relatedness of bla NDM-1 Harboring Extended-Spectrum β-Lactamase Producing Uropathogenic Escherichia coli and Klebsiella pneumoniae in the North of Iran. Infect Drug Resist 2020; 13:651-657. [PMID: 32158241 PMCID: PMC7049266 DOI: 10.2147/idr.s230335] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 02/08/2020] [Indexed: 01/14/2023] Open
Abstract
Background Escherichia coli and Klebsiella pneumoniae as an important part of Enterobacterales family are important causes of both community- and hospital-acquired infections. The present study aimed to investigate the prevalence of antibiotics resistance and molecular characteristics of uropathogenic isolates of E. coli and K. pneumoniae in Iranian patients. Methods This cross-sectional study performed on 223 Escherichia coli and 68 Klebsiella pneumoniae isolates obtained from hospitalized patients in the north of Iran. The isolates were identified by standard microbiologic tests and confirmed by API 20E strip. Disk diffusion method was applied to determine antibiotic susceptibility pattern. The presence of β-lactamases encoding genes was evaluated by PCR method. Analysis of the mutations and homology among sequences was done by the CLC sequence viewer (Qiagen, Denmark), and phylogenetic trees were constructed by the neighbor-joining method (Bootstrap: 1000 times). Results The overall rates of extended-spectrum β-lactamases (ESBLs)-producing E. coli and K. pneumoniae isolates were 37.7% and 32.4%, respectively. The overall presence of blaSHV, blaNDM-1, and blaOXA-1 genes was detected in 16 (5.5%), 12 (4.1%), and 48 (16.4%) of isolates, respectively. The neighbor-joining analysis for E. coli KU985246.1 strain showed that the most related blaNDM-1 sequences were from China, Singapore, UK, Thailand, and Bangladesh. While K. pneumoniae KU985245.1 strains were mostly related to blaNDM-1 sequences form Myanmar, and China. Conclusion In summary, the remarkable rate of ESBL-producing uropathogenic Enterobacterales along with the first prevalence of NDM-1 β-lactamases can be a serious concern in our region.
Collapse
Affiliation(s)
- Samar Jamali
- Department of Microbiology, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Talayeh Tavakoly
- Department of Microbiology, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Ali Mojtahedi
- Department of Microbiology, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Mohammad Shenagari
- Cellular and Molecular Research Center, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| |
Collapse
|
8
|
Onanuga A, Mahindroo J, Singh S, Taneja N. Phenotypic and molecular characterization of antimicrobial resistant Escherichia coli from urinary tract infections in Port-Harcourt, Nigeria. Pan Afr Med J 2019; 34:144. [PMID: 32010423 PMCID: PMC6969895 DOI: 10.11604/pamj.2019.34.144.18182] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 11/01/2019] [Indexed: 12/11/2022] Open
Abstract
Introduction Multidrug resistance among Escherichia coli causing Urinary Tract Infections (UTIs) is a major public health problem, threatening the effective treatment of UTIs. This study investigated the phenotypic and molecular characteristics of E. coli associated with UTIs in Port-Harcourt, Nigeria. Methods Twenty-five non-duplicate isolates of E. coli from UTIs patients at the University of Port-Harcourt Teaching Hospital, Nigeria were identified using Matrix-Assisted Laser Desorption Ionization Time-of-Flight (MALDI-TOF) Mass Spectrometry. The antimicrobial susceptibility patterns were determined using Kirby-Bauer disc diffusion technique. Phenotypic expression of Extended Spectrum Beta Lactamases (ESBLs) and AmpC beta-lactamase were determined using standard laboratory methods and polymerase chain reaction (PCR) was used to detect ESBLs, AmpC, Quinolones and Aminoglycosides resistance genes. Results The isolates exhibited high rates of resistance to co-trimoxazole (76%), nalidixic acid (68%), ciprofloxacin (60%), gentamicin (44%) and low resistance to cefotaxime (20%) but were fully susceptible to cefoperazone/sulbactam, amikacin, nitrofurantoin, colistin and carbapenems. Phenotypic expression of ESBLs was recorded in 6(24%) isolates while genotypic detection revealed the highest prevalence of blaTEM 22(88%), followed by blaCTX-M-15 16(64%), blaSHV 7(28%) and blaOXA-1 6(24%) while AmpC (blaCMY-2) gene was detected in 8(32%) isolates. Amongst the quinolone resistant isolates, qnr variants (qnrB, qnrD and qnrS) and aac(6')-Ib genes were detected in 7(28%) and 3(12%) isolates respectively while all gentamicin resistant isolates possessed the aacC2 gene. The co-expression of blaCTX-M-15 with quinolones and aminoglycoside genes were 20% and 40% respectively. The prevalence of multiple drug resistance was 52%. Conclusion A high proportion of the studied E. coli isolates co-expressed ESBLs, quinolones and aminoglycosides resistance genes which call for prompt antibiotic stewardship and preventive strategies to limit the spread of these genes.
Collapse
Affiliation(s)
- Adebola Onanuga
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmacy, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria.,Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Jaspreet Mahindroo
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Shreya Singh
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Neelam Taneja
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| |
Collapse
|
9
|
Dumaru R, Baral R, Shrestha LB. Study of biofilm formation and antibiotic resistance pattern of gram-negative Bacilli among the clinical isolates at BPKIHS, Dharan. BMC Res Notes 2019; 12:38. [PMID: 30658694 PMCID: PMC6339267 DOI: 10.1186/s13104-019-4084-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/14/2019] [Indexed: 01/31/2023] Open
Abstract
Objectives Gram-negative bacilli are the common causative agents for community-acquired, nosocomial and opportunistic infections. The recent upsurge of biofilm, as well as beta-lactamases producing strains, have synergistically led to the extensive dissemination of multi-drug resistant gram-negative bacilli. This study was carried out with an intention to detect the biofilm formation by gram-negative bacilli and determine their antibiogram along with the detection of extended-spectrum beta-lactamases (ESBLs) and metallo-beta-lactamases (MBLs) production. Results Among 314 isolates, Escherichia coli (38%) were the predominant isolates followed by Acinetobacter spp. (20%), Klebsiella spp. (16%), and Pseudomonas spp. (12%). Overall, 197 (62.73%) of isolates were biofilm positive. 84 (26.75%) and 51 (16.24%) were confirmed as ESBL and MBL producers respectively. The association between MBL production and biofilm formation was statistically significant (χ2 = 10.20, P value= 0.002) whereas it was insignificant between ESBL and biofilm production (χ2 = 0.006, P-value= 0.937). Most of the biofilm and MBL producing strains were multi-drug resistant.
Collapse
Affiliation(s)
- Rabina Dumaru
- Microbiology & Infectious Diseases, B.P Koirala Institute of Health Sciences, Dharan, 56700, Nepal.
| | - Ratna Baral
- Microbiology & Infectious Diseases, B.P Koirala Institute of Health Sciences, Dharan, 56700, Nepal
| | - Lok Bahadur Shrestha
- Microbiology & Infectious Diseases, B.P Koirala Institute of Health Sciences, Dharan, 56700, Nepal
| |
Collapse
|
10
|
Malekzadegan Y, Khashei R, Sedigh Ebrahim-Saraie H, Jahanabadi Z. Distribution of virulence genes and their association with antimicrobial resistance among uropathogenic Escherichia coli isolates from Iranian patients. BMC Infect Dis 2018; 18:572. [PMID: 30442101 PMCID: PMC6238375 DOI: 10.1186/s12879-018-3467-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 10/31/2018] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Urinary tract infections (UTIs) are one of the most frequent diseases encountered by humans worldwide. The presence of multidrug-resistant (MDR) uropathogenic Escherichia coli (UPEC) harboring several virulence factors, is a major risk factor for inpatients. We sought to investigate the rate of antibiotic resistance and virulence-associated genes among the UPECs isolated from an Iranian symptomatic population. METHODS A total of 126 isolates from inpatients with UTI from different wards were identified as UPEC using the conventional microbiological tests. After identification of UPECs, all the isolates were subjected to antimicrobial susceptibility test and polymerase chain reaction (PCR) to identify the presence of 9 putative virulence genes and their association with the clinical outcomes or antimicrobial resistance. RESULTS The data showed that the highest and the lowest resistance rates were observed against ampicillin (88.9%), and imipenem (0.8%), respectively. However, the frequency of resistance to ciprofloxacin was found to be 55.6%. High prevalence of MDR (77.8%) and extended-spectrum β-lactamase (ESBL) (54.8%) were substantial. PCR results revealed the frequency of virulence genes ranged from 0 to 99.2%. Among 9 evaluated genes, the frequency of 4 genes (fimH, sfa, iutA, and PAI marker) was > 50% among all the screened isolates. The iutA, pap GII, and hlyA genes were more detected in the urosepsis isolates with significantly different frequencies. The different combinations of virulence genes were characterized as urovirulence patterns. The isolates recovered from pyelonephritis, cystitis, and urosepsis cases revealed 27, 22, and 6 virulence patterns, respectively. A significant difference was determined between ESBL production with pap GII, iutA, and PAI marker genes. CONCLUSIONS Our study highlighted the MDR UPEC with high heterogeneity of urovirulence genes. Considering the high rate of ciprofloxacin resistance, alternative drugs and monitoring of the susceptibility profile for UPECs are recommended.
Collapse
Affiliation(s)
- Yalda Malekzadegan
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Khashei
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hadi Sedigh Ebrahim-Saraie
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Jahanabadi
- Department of Urology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| |
Collapse
|
11
|
Davoudi-Monfared E, Khalili H. The threat of carbapenem-resistant gram-negative bacteria in a Middle East region. Infect Drug Resist 2018; 11:1831-1880. [PMID: 30425536 PMCID: PMC6203168 DOI: 10.2147/idr.s176049] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Data on the status of carbapenem-resistant microorganisms in the Middle East countries are scarce. The aim of this review was to collect available data regarding resistance to carbapenems in a Middle East region. Available data regarding carbapenem-resistant isolates were considered for evaluation in this review. Biomedical electronic databases were systematically searched to find related articles. The key terms used were "carbapenem-resistant, resistant gram-negative bacilli, Enterobacteriaceae, fermenting and non-fermenting gram-negative bacilli, Pseudomonas, Acinetobacter, Klebsiella and Iran". After primary screening, 275 relevant articles were selected to be assessed thoroughly. Resistance rate to carbapenems was reported between 1% and 86% during years 2006-2018. Most of the carbapenem-resistant microorganisms were isolated from burn patients. Modified Hodge test was a commonly used phenotypic test. Only in few studies, genotypic assays were considered. Pattern of antibiotic use can affect emergence of resistant microorganisms. Rational use of drugs, and specifically, antibiotics is a challenging issue in developing countries. Mean number of drugs per prescription in these countries was higher than the World Health Organization standards. Overuse of antibiotics, especially injectable ones, and easy access to antibiotics without prescription is a warning alarm for future antibiotic resistance in developing countries. Establishing antimicrobial stewardship's programs is new in the hospitals. Unfortunately, rules and regulatory issues to restrict antibiotic access in community pharmacies and prescription by general physicians are limited.
Collapse
Affiliation(s)
- Effat Davoudi-Monfared
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran,
| | - Hossein Khalili
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran,
| |
Collapse
|