1
|
Shi J, Cheng J, Liu S, Zhu Y, Zhu M. Acinetobacter baumannii: an evolving and cunning opponent. Front Microbiol 2024; 15:1332108. [PMID: 38318341 PMCID: PMC10838990 DOI: 10.3389/fmicb.2024.1332108] [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: 11/02/2023] [Accepted: 01/08/2024] [Indexed: 02/07/2024] Open
Abstract
Acinetobacter baumannii is one of the most common multidrug-resistant pathogens causing nosocomial infections. The prevalence of multidrug-resistant A. baumannii infections is increasing because of several factors, including unregulated antibiotic use. A. baumannii drug resistance rate is high; in particular, its resistance rates for tigecycline and polymyxin-the drugs of last resort for extensively drug-resistant A. baumannii-has been increasing annually. Patients with a severe infection of extensively antibiotic-resistant A. baumannii demonstrate a high mortality rate along with a poor prognosis, which makes treating them challenging. Through carbapenem enzyme production and other relevant mechanisms, A. baumannii has rapidly acquired a strong resistance to carbapenem antibiotics-once considered a class of strong antibacterials for A. baumannii infection treatment. Therefore, understanding the resistance mechanism of A. baumannii is particularly crucial. This review summarizes mechanisms underlying common antimicrobial resistance in A. baumannii, particularly those underlying tigecycline and polymyxin resistance. This review will serve as a reference for reasonable antibiotic use at clinics, as well as new antibiotic development.
Collapse
Affiliation(s)
- Jingchao Shi
- Open Laboratory Medicine, Hangzhou Xixi Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
- Department of Clinical Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
- Graduate School, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jianghao Cheng
- Open Laboratory Medicine, Hangzhou Xixi Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Shourong Liu
- Department of Infectious Disease, Hangzhou Xixi Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Yufeng Zhu
- Open Laboratory Medicine, Hangzhou Xixi Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| | - Mingli Zhu
- Open Laboratory Medicine, Hangzhou Xixi Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, China
| |
Collapse
|
2
|
Gera B, Gautam H, Raza S, Mohapatra S, Sood S, Dhawan B, Kapil A, Das BK. Detection of Aminoglycoside Modifying Enzyme (AME) genes in Acinetobacter baumannii isolates and the inhibitory effect of efflux pump activity on drug susceptibility pattern. Indian J Med Microbiol 2024; 47:100493. [PMID: 37890414 DOI: 10.1016/j.ijmmb.2023.100493] [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: 08/23/2023] [Revised: 10/07/2023] [Accepted: 10/08/2023] [Indexed: 10/29/2023]
Abstract
INTRODUCTION The development of aminoglycoside modifying enzymes (AMEs) and increased efflux activity are considered important aminoglycosides resistance mechanisms. AIM This study is focused on the detection of the AMEs gene and assessing the effect of efflux pump inhibitor on the reversal of A. baumannii drug susceptibility. METHODOLOGY Bacterial DNA was amplified using AMEs gene-specific primers. Isolates were also investigated for efflux pump activity using efflux pump inhibitor (EPI) i.e. Carbonyl cyanide m-chlorophenyl hydrazone (CCCP) and the impact of both mechanisms was analyzed. RESULTS Among A. baumannii isolates, 55% isolates (n = 22/40) were identified to have aminoglycoside modifying enzymes genes; ant(3')-I gene (50%, 11/22), aac(6')-Ib gene (45.4%, 10/22), aph(3')-I gene (18.1%, 4/22) and aac(3)-I (9.1%, 2/22). Total 70% isolates have shown MIC alteration in different classes of drugs in response to EPI-CCCP. Such alteration was found in 100% amikacin sensitive and 58.6% amikacin resistant, 93.7% and 57.1% gentamicin sensitive and resistant isolates respectively. CONCLUSION The presence of aminoglycosides modifying enzymes was frequent among aminoglycosides resistant A. baumannii isolates and the coexistence of efflux pumps activity also plays an important role to increase drug resistance. REPOSITORIES Genbank and their accession numbers are MT903331[aac(3)-I], MT903332 MT903333 [ant(3')-I], MT903334, MT903335 [aph(3')-I)] and MT903336, MT940242 [ aac(6')-Ib].
Collapse
Affiliation(s)
- Bhavna Gera
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Hitender Gautam
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Shahid Raza
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Sarita Mohapatra
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Seema Sood
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Benu Dhawan
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Arti Kapil
- North DMC Medical College & Hindu Rao Hospital, New Delhi 110007, India
| | - Bimal Kumar Das
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| |
Collapse
|
3
|
Yusuf I, Muhammad ZD, Muhammad Amin B, Shuaibu MD, Hamza N, Isah HD, Abdullahi NB, Ene PJ, Shuaibu SS, Doguwa N, Pedro SL, Muhammad MA. Detection of clinically relevant antibiotic-resistant bacteria in shared fomites, waste water and municipal solid wastes disposed near residential areas of a Nigerian city. Access Microbiol 2023; 5:000641.v4. [PMID: 38188243 PMCID: PMC10765043 DOI: 10.1099/acmi.0.000641.v4] [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: 05/13/2023] [Accepted: 11/26/2023] [Indexed: 01/09/2024] Open
Abstract
Studies investigating environmental hotspots of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in Nigeria are limited. This study was designed to assess various environmental sources and commonly touched surfaces as potential carriers of ARB and ARGs with implications for public health. A total of 392 samples, including sewage (36), sludge (36), diapers (20), plastics (20), water sachet polythene bags (20), food wastes (20), soil beneath dump sites (20), and frequently touched surfaces such as restroom floors (80), corridors (24), door handles (56), and room floors and walls (60), were collected and screened for the presence of resistant bacteria carrying genes such as bla KPC, bla NDM-1, bla CMY-2, bla IMP, bla OXA66 and MecA. Additionally, we employed standard techniques to detect methicillin-resistant Staphylococcus aureus (MRSA) and extended-spectrum β-lactamase (ESBL)-producing Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Acinetobacter baumannii . We also evaluated the effectiveness of routine disinfection procedures in eliminating ARB from restroom floors. Our findings revealed that sewage, sludge, diapers, food wastes and restroom floors are frequently contaminated with highly and moderately resistant strains of E. coli, K. pneumoniae, P. aeruginosa and MRSA. Notably, we identified two variants of the bla OXA51-like gene (bla OXA-66 and bla OXA-180) in A. baumannii isolated from these environmental sources. Furthermore, we detected seven ESBL- K. pneumoniae , five ESBL- A. baumannii , two ESBL- E. coli and one ESBL- P. aeruginosa , all carrying one or more ARGs (bla KPC, bla NDM-1, bla CMY-2), in isolates recovered from sewage, sludge, restroom floors and plastics. It is of note that ARB persisted on restroom floors even after disinfection procedures. In conclusion, this study highlights that environmental wastes indiscriminately discarded in residential areas and shared surfaces among individuals are heavily colonized by ARB carrying ARGs of significant public health importance.
Collapse
Affiliation(s)
- Ibrahim Yusuf
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Zainab Damji Muhammad
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Binta Muhammad Amin
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Maryam Danladi Shuaibu
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Nafisatu Hamza
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Hajara Dauda Isah
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Nasir Bako Abdullahi
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Patience James Ene
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Sameera Salisu Shuaibu
- Department of Microbiology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, P.M.B. 3011, Kano, Nigeria
| | - Nasir Doguwa
- Department of Microbiology, Aminu Kano Teaching Hospital, Kano, Nigeria
| | | | | |
Collapse
|
4
|
Spiliopoulou A, Giannopoulou I, Assimakopoulos SF, Jelastopulu E, Bartzavali C, Marangos M, Paliogianni F, Kolonitsiou F. Laboratory Surveillance of Acinetobacter spp. Bloodstream Infections in a Tertiary University Hospital during a 9-Year Period. Trop Med Infect Dis 2023; 8:503. [PMID: 37999622 PMCID: PMC10674392 DOI: 10.3390/tropicalmed8110503] [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: 09/30/2023] [Revised: 11/12/2023] [Accepted: 11/15/2023] [Indexed: 11/25/2023] Open
Abstract
Multidrug-resistant Acinetobacter baumannii infections have become a threat for public health worldwide. The aim of the present study was to follow-up resistance patterns of Acinetobacter spp. bloodstream isolates in a Tertiary University Hospital over the last nine years, from 2014 to 2022. Susceptibility patterns were followed for the following antimicrobial agents: amikacin, gentamicin, tobramycin, ciprofloxacin, levofloxacin, imipenem, meropenem, tigecycline, trimethoprim/sulfamethoxazole, and colistin. Minimal inhibitory concentration (MIC) values to ampicillin/sulbactam, cefepime, ceftazidime, minocycline, piperacillin/tazobactam were evaluated from 2020 to 2023. During the study period, 853 Acinetobacter spp. bloodstream infections (BSIs) were recorded, accounting for 5.36% of all BSIs. A. baumannii was isolated in 795 cases (93.2%), during the study period. Most BSIs were recorded in adult intensive care units (ICU) (46.2%) and medical wards (42%). Among A. baumannii isolates, 4.5% were multidrug-resistant, 84.7% were extensively drug-resistant, and 8.5% were pandrug-resistant. Resistance to carbapenems was over 95%. Resistance to tigecycline increased significantly during the last years of the study (2020-2022); A. baumannii isolates with MIC ≤ 2 μg/mL accounted for 28.5% of all isolates. Resistance to colistin exhibited an increasing pattern up to 42.2% in 2022. Increasing resistance rates and the evolution of pandrug-resistant isolates call for the urgent application of preventive and response actions.
Collapse
Affiliation(s)
- Anastasia Spiliopoulou
- Department of Microbiology, University Hospital of Patras, 265 04 Rio, Greece (C.B.); (F.P.); (F.K.)
| | - Ioanna Giannopoulou
- Department of Microbiology, University Hospital of Patras, 265 04 Rio, Greece (C.B.); (F.P.); (F.K.)
| | - Stelios F. Assimakopoulos
- Department of Infectious Diseases, University Hospital of Patras, 265 04 Rio, Greece; (S.F.A.); (M.M.)
| | - Eleni Jelastopulu
- Department of Public Health, School of Medicine, University of Patras, 265 04 Patras, Greece;
| | - Christina Bartzavali
- Department of Microbiology, University Hospital of Patras, 265 04 Rio, Greece (C.B.); (F.P.); (F.K.)
| | - Markos Marangos
- Department of Infectious Diseases, University Hospital of Patras, 265 04 Rio, Greece; (S.F.A.); (M.M.)
| | - Fotini Paliogianni
- Department of Microbiology, University Hospital of Patras, 265 04 Rio, Greece (C.B.); (F.P.); (F.K.)
| | - Fevronia Kolonitsiou
- Department of Microbiology, University Hospital of Patras, 265 04 Rio, Greece (C.B.); (F.P.); (F.K.)
| |
Collapse
|
5
|
Saleh NM, Saad SI, El-Sayed M, El-Sayyad GS, Abo Safe FA. Contribution of different mechanisms to aminoglycoside resistance in clinical isolates of Acinetobacter baumannii. Microb Pathog 2023; 182:106255. [PMID: 37481006 DOI: 10.1016/j.micpath.2023.106255] [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: 05/08/2023] [Revised: 06/23/2023] [Accepted: 07/13/2023] [Indexed: 07/24/2023]
Abstract
The antibiotics overuse for infection treatment was the sparkle in the spreading of multi-drug resistance Acinetobacter baumannii in hospitals. In our study, we evaluated the contribution of the aminoglycoside resistance mechanisms of A. baumannii to the resistance surge in some selected Egyptian hospitals with a checkerboard assay application to retrieve the aminoglycoside activity. The resistance profile analysis of collected 200 A. baumannii isolates revealed a multidrug-resistant pattern with limited susceptibilities to aminoglycosides. Analysis of the prevalence of aminoglycoside-modifying enzyme (AMEs) genes revealed the presence of the six AMEs genes either singly or in combination in selected isolates and aph (3)-VIa gene was the predominant one. At the same time, four efflux pump genes of AdeABC and AdeKJL family showed significant (P < 0.001) up-regulation levels. Moreover, the implementation of combination strategy showed fourteen synergistic activities against two high-level aminoglycoside-resistance (HLAR) A. baumannii isolates. The findings highlighted the alarming levels of aminoglycoside resistance in A. baumannii isolates, which proved that a common enzymatic modification mechanism acts synergistically with decreased antibiotic accumulation in acquiring aminoglycoside resistance. Additionally, the study provides useful information for the promising synergistic combination therapy that reduces the therapeutic dose of aminoglycosides used and subsequently increases their clinical application.
Collapse
Affiliation(s)
- Neveen M Saleh
- Microbiology Department, Egyptian Drug Authority (EDA) (former National Organization for Drug Control and Research, NODCAR), 14281, Giza, Egypt.
| | - Sarah I Saad
- Botany Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt
| | - Mohamed El-Sayed
- Microbiology Department, Egyptian Drug Authority (EDA) (former National Organization for Biological Control and Research, NODCAR), Giza, Egypt
| | - Gharieb S El-Sayyad
- Microbiology and Immunology Department, Faculty of Pharmacy, Ahram Canadian University (ACU), 6th of October city, Giza, Egypt; Department of Microbiology and Immunology, Faculty of Pharmacy, Galala University, New Galala city, Suez, Egypt; Drug Microbiology Lab, Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.
| | - Feriala A Abo Safe
- Botany Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt
| |
Collapse
|
6
|
Yang J, Son Y, Kang M, Park W. AamA-mediated epigenetic control of genome-wide gene expression and phenotypic traits in Acinetobacter baumannii ATCC 17978. Microb Genom 2023; 9:mgen001093. [PMID: 37589545 PMCID: PMC10483419 DOI: 10.1099/mgen.0.001093] [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: 12/04/2022] [Accepted: 08/03/2023] [Indexed: 08/18/2023] Open
Abstract
Individual deletions of three genes encoding orphan DNA methyltransferases resulted in the occurrence of growth defect only in the aamA (encoding AcinetobacterAdenine Methylase A) mutant of A. baumannii strain ATCC 17978. Our single-molecule real-time sequencing-based methylome analysis revealed multiple AamA-mediated DNA methylation sites and proposed a potent census target motif (TTTRAATTYAAA). Loss of Dam led to modulation of genome-wide gene expression, and several Dam-target sites including the promoter region of the trmD operon (rpsP, rimM, trmD, and rplS) were identified through our methylome and transcriptome analyses. AamA methylation also appeared to control the expression of many genes linked to membrane functions (lolAB, lpxO), replication (dnaA) and protein synthesis (trmD operon) in the strain ATCC 17978. Interestingly, cellular resistance against several antibiotics and ethidium bromide through functions of efflux pumps diminished in the absence of the aamA gene, and the complementation of aamA gene restored the wild-type phenotypes. Other tested phenotypic traits such as outer-membrane vesicle production, biofilm formation and virulence were also affected in the aamA mutant. Collectively, our data indicated that epigenetic regulation through AamA-mediated DNA methylation of novel target sites mostly in the regulatory regions could contribute significantly to changes in multiple phenotypic traits in A. baumannii ATCC 17978.
Collapse
Affiliation(s)
- Jihye Yang
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Yongjun Son
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Mingyeong Kang
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Woojun Park
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| |
Collapse
|
7
|
Junaid M, Thirapanmethee K, Khuntayaporn P, Chomnawang MT. CRISPR-Based Gene Editing in Acinetobacter baumannii to Combat Antimicrobial Resistance. Pharmaceuticals (Basel) 2023; 16:920. [PMID: 37513832 PMCID: PMC10384873 DOI: 10.3390/ph16070920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/19/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023] Open
Abstract
Antimicrobial resistance (AMR) poses a significant threat to the health, social, environment, and economic sectors on a global scale and requires serious attention to addressing this issue. Acinetobacter baumannii was given top priority among infectious bacteria because of its extensive resistance to nearly all antibiotic classes and treatment options. Carbapenem-resistant A. baumannii is classified as one of the critical-priority pathogens on the World Health Organization (WHO) priority list of antibiotic-resistant bacteria for effective drug development. Although available genetic manipulation approaches are successful in A. baumannii laboratory strains, they are limited when employed on newly acquired clinical strains since such strains have higher levels of AMR than those used to select them for genetic manipulation. Recently, the CRISPR-Cas (Clustered regularly interspaced short palindromic repeats/CRISPR-associated protein) system has emerged as one of the most effective, efficient, and precise methods of genome editing and offers target-specific gene editing of AMR genes in a specific bacterial strain. CRISPR-based genome editing has been successfully applied in various bacterial strains to combat AMR; however, this strategy has not yet been extensively explored in A. baumannii. This review provides detailed insight into the progress, current scenario, and future potential of CRISPR-Cas usage for AMR-related gene manipulation in A. baumannii.
Collapse
Affiliation(s)
- Muhammad Junaid
- Department of Microbiology, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Antimicrobial Resistance Interdisciplinary Group (AmRIG), Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
| | - Krit Thirapanmethee
- Department of Microbiology, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Antimicrobial Resistance Interdisciplinary Group (AmRIG), Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
| | - Piyatip Khuntayaporn
- Department of Microbiology, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Antimicrobial Resistance Interdisciplinary Group (AmRIG), Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
| | - Mullika Traidej Chomnawang
- Department of Microbiology, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Antimicrobial Resistance Interdisciplinary Group (AmRIG), Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
| |
Collapse
|
8
|
Wu HJ, Xiao ZG, Lv XJ, Huang HT, Liao C, Hui CY, Xu Y, Li HF. Drug‑resistant Acinetobacter baumannii: From molecular mechanisms to potential therapeutics (Review). Exp Ther Med 2023; 25:209. [PMID: 37090073 PMCID: PMC10119666 DOI: 10.3892/etm.2023.11908] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 02/24/2023] [Indexed: 04/25/2023] Open
Abstract
Bacterial drug resistance is increasingly becoming an important problem that needs to be solved urgently in modern clinical practices. Infection caused by Acinetobacter baumannii is a serious threat to the life and health of patients. The drug resistance rate of Acinetobacter baumannii strains is increasing, thus research on the drug resistance of Acinetobacter baumannii has also seen an increase. When patients are infected with drug-resistant Acinetobacter baumannii, the availability of suitable antibiotics commonly used in clinical practices is becoming increasingly limited and the prognosis of patients is worsening. Studying the molecular mechanism of the drug resistance of Acinetobacter baumannii is fundamental to solving the problem of drug-resistant Acinetobacter baumannii and potentially other 'super bacteria'. Drug resistance mechanisms primarily include enzymes, membrane proteins, efflux pumps and beneficial mutations. Research on the underlying mechanisms provides a theoretical basis for the use and development of antibiotics and the development of novel treatment methods.
Collapse
Affiliation(s)
- Hao-Jia Wu
- Clinical College of Traditional Chinese Medicine, Hubei University of Chinese Medicine, Wuhan, Hubei 430065, P.R. China
| | - Zhi-Gang Xiao
- Department of Orthopedics, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430061, P.R. China
| | - Xiao-Juan Lv
- Department of Hepatology, Hubei Key Laboratory of The Theory and Application Research of Liver and Kidney in Traditional Chinese Medicine, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Affiliated Hospital of Hubei University of Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei 430074, P.R. China
| | - Hai-Tang Huang
- Department of Hepatology, Hubei Key Laboratory of The Theory and Application Research of Liver and Kidney in Traditional Chinese Medicine, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Affiliated Hospital of Hubei University of Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei 430074, P.R. China
| | - Chu Liao
- Department of Hepatology, Hubei Key Laboratory of The Theory and Application Research of Liver and Kidney in Traditional Chinese Medicine, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Affiliated Hospital of Hubei University of Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei 430074, P.R. China
| | - Chen-Yang Hui
- Department of Hepatology, Hubei Key Laboratory of The Theory and Application Research of Liver and Kidney in Traditional Chinese Medicine, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Affiliated Hospital of Hubei University of Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei 430074, P.R. China
| | - Yue Xu
- Clinical College of Traditional Chinese Medicine, Hubei University of Chinese Medicine, Wuhan, Hubei 430065, P.R. China
| | - Heng-Fei Li
- Department of Hepatology, Hubei Key Laboratory of The Theory and Application Research of Liver and Kidney in Traditional Chinese Medicine, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Affiliated Hospital of Hubei University of Chinese Medicine, Wuhan, Hubei 430061, P.R. China
- Department of Infection, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei 430074, P.R. China
- Correspondence to: Professor Heng-Fei Li, Department of Hepatology, Hubei Key Laboratory of The Theory and Application Research of Liver and Kidney in Traditional Chinese Medicine, Hubei Provincial Hospital of Traditional Chinese Medicine, Room 4, Garden Hill, Wuchang, Wuhan, Hubei 430061, P.R. China
| |
Collapse
|
9
|
Borges Duarte DF, Gonçalves Rodrigues A. Acinetobacter baumannii: insights towards a comprehensive approach for the prevention of outbreaks in health-care facilities. APMIS 2022; 130:330-337. [PMID: 35403751 DOI: 10.1111/apm.13227] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 04/07/2022] [Indexed: 12/14/2022]
Abstract
Acinetobacter baumannii is known to be an opportunistic pathogen frequently responsible for outbreaks in health-care facilities, particularly in Intensive Care Units (ICU). It can easily survive in the hospital setting for long periods and can be transmitted throughout the hospital in a variety of ways, explored in this review. It can also easily acquire antibiotic resistance determinants rendering several antibiotic drugs useless. In 2019, the US Centre for Disease Control (CDC) considered the organism as an urgent threat. The aim of this review was to raise the awareness of the medical community about the relevance of this pathogen and discuss how it may impact seriously the healthcare institutions particularly in the aftermath of the recent COVID-19 pandemic. PubMed was searched, and articles that met inclusion criteria were reviewed. We conclude by the need to raise awareness to this pathogen's relevance and to encourage the implementation of preventive measures in order to mitigate its consequences namely the triage of specific high-risk patients.
Collapse
Affiliation(s)
- Diogo Filipe Borges Duarte
- Division of Microbiology, Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal.,CINTESIS - Center for Health Technology and Services Research, Porto, Portugal
| | - Acácio Gonçalves Rodrigues
- Division of Microbiology, Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal.,CINTESIS - Center for Health Technology and Services Research, Porto, Portugal.,RISE - Health Research Network, Porto, Portugal.,Burn Unit, Department of Plastic and Reconstructive Surgery, S. Joao University Center Hospital, Porto, Portugal
| |
Collapse
|
10
|
Havenga B, Reyneke B, Waso-Reyneke M, Ndlovu T, Khan S, Khan W. Biological Control of Acinetobacter baumannii: In Vitro and In Vivo Activity, Limitations, and Combination Therapies. Microorganisms 2022; 10:microorganisms10051052. [PMID: 35630494 PMCID: PMC9147981 DOI: 10.3390/microorganisms10051052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 02/01/2023] Open
Abstract
The survival, proliferation, and epidemic spread of Acinetobacter baumannii (A. baumannii) in hospital settings is associated with several characteristics, including resistance to many commercially available antibiotics as well as the expression of multiple virulence mechanisms. This severely limits therapeutic options, with increased mortality and morbidity rates recorded worldwide. The World Health Organisation, thus, recognises A. baumannii as one of the critical pathogens that need to be prioritised for the development of new antibiotics or treatment. The current review will thus provide a brief overview of the antibiotic resistance and virulence mechanisms associated with A. baumannii’s “persist and resist strategy”. Thereafter, the potential of biological control agents including secondary metabolites such as biosurfactants [lipopeptides (surfactin and serrawettin) and glycolipids (rhamnolipid)] as well as predatory bacteria (Bdellovibrio bacteriovorus) and bacteriophages to directly target A. baumannii, will be discussed in terms of their in vitro and in vivo activity. In addition, limitations and corresponding mitigations strategies will be outlined, including curtailing resistance development using combination therapies, product stabilisation, and large-scale (up-scaling) production.
Collapse
Affiliation(s)
- Benjamin Havenga
- Department of Microbiology, Faculty of Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa; (B.H.); (B.R.)
| | - Brandon Reyneke
- Department of Microbiology, Faculty of Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa; (B.H.); (B.R.)
| | - Monique Waso-Reyneke
- Faculty of Health Sciences, University of Johannesburg, Doornfontein 2028, South Africa; (M.W.-R.); (S.K.)
| | - Thando Ndlovu
- Department of Biological Sciences, Faculty of Science, University of Botswana, Private Bag UB, Gaborone 0022, Botswana;
| | - Sehaam Khan
- Faculty of Health Sciences, University of Johannesburg, Doornfontein 2028, South Africa; (M.W.-R.); (S.K.)
| | - Wesaal Khan
- Department of Microbiology, Faculty of Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa; (B.H.); (B.R.)
- Correspondence: ; Tel.: +27-21-808-5804
| |
Collapse
|
11
|
Genetic Diversity of Antimicrobial Resistance and Key Virulence Features in Two Extensively Drug-Resistant Acinetobacter baumannii Isolates. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052870. [PMID: 35270562 PMCID: PMC8910769 DOI: 10.3390/ijerph19052870] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/25/2022] [Accepted: 02/27/2022] [Indexed: 01/27/2023]
Abstract
In recent decades, Acinetobacter baumannii emerged as a major infective menace in healthcare settings due to scarce therapeutic options to treat infections. Therefore, undertaking genome comparison analyses of multi-resistant A. baumannii strains could aid the identification of key bacterial determinants to develop innovative anti-virulence approaches. Following genome sequencing, we performed a molecular characterization of key genes and genomic comparison of two A. baumannii strains, #36 and #150, with selected reference genomes. Despite a different antibiotic resistance gene content, the analyzed strains showed a very similar antibiogram profile. Interestingly, the lack of some important virulence determinants (i.e., bap, ata and omp33–36) did not abrogate their adhesive abilities to abiotic and biotic surfaces, as reported before; indeed, strains retained these capacities, although to a different extent, suggesting the presence of distinct vicarious genes. Conversely, secretion systems, lipopolysaccharide (LPS), capsule and iron acquisition systems were highly similar to A. baumannii reference strains. Overall, our analyses increased our knowledge on A. baumannii genomic content and organization as well as the genomic events occurring in nosocomial isolates to better fit into changing healthcare environments.
Collapse
|
12
|
Zafer MM, Hussein AFA, Al-Agamy MH, Radwan HH, Hamed SM. Genomic Characterization of Extensively Drug-Resistant NDM-Producing Acinetobacter baumannii Clinical Isolates With the Emergence of Novel bla ADC-257. Front Microbiol 2021; 12:736982. [PMID: 34880837 PMCID: PMC8645854 DOI: 10.3389/fmicb.2021.736982] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 10/28/2021] [Indexed: 01/07/2023] Open
Abstract
Acinetobacter baumannii has become a major challenge to clinicians worldwide due to its high epidemic potential and acquisition of antimicrobial resistance. This work aimed at investigating antimicrobial resistance determinants and their context in four extensively drug-resistant (XDR) NDM-producing A. baumannii clinical isolates collected between July and October 2020 from Kasr Al-Ainy Hospital, Cairo, Egypt. A total of 20 A. baumannii were collected and screened for acquired carbapenemases (blaNDM, blaVIM and blaIMP) using PCR. Four NDM producer A. baumannii isolates were identified and selected for whole-genome sequencing, in silico multilocus sequence typing, and resistome analysis. Antimicrobial susceptibility profiles were determined using disk diffusion and broth microdilution tests. All blaNDM-positive A. baumannii isolates were XDR. Three isolates belonged to high-risk international clones (IC), namely, IC2 corresponding to ST570Pas/1701Oxf (M20) and IC9 corresponding to ST85Pas/ST1089Oxf (M02 and M11). For the first time, we report blaNDM-1 gene on the chromosome of an A. baumannii strain that belongs to sequence type ST164Pas/ST1418Oxf. Together with AphA6, blaNDM-1 was bracketed by two copies of ISAba14 in ST85Pas isolates possibly facilitating co-transfer of amikacin and carbapenem resistance. A novel blaADC allele (blaADC-257) with an upstream ISAba1 element was identified in M19 (ST/CC164Pas and ST1418Oxf/CC234Oxf). blaADC genes harbored by M02 and M11 were uniquely interrupted by IS1008. Tn2006-associated blaOXA-23 was carried by M20. blaOXA-94 genes were preceded by ISAba1 element in M02 and M11. AbGRI3 was carried by M20 hosting the resistance genes aph(3`)-Ia, aac(6`)-Ib`, catB8, ant(3``)-Ia, sul1, armA, msr(E), and mph(E). Nonsynonymous mutations were identified in the quinolone resistance determining regions (gyrA and parC) of all isolates. Resistance to colistin in M19 was accompanied by missense mutations in lpxACD and pmrABC genes. The current study provided an insight into the genomic background of XDR phenotype in A. baumannii recovered from patients in Egypt. WGS revealed strong association between resistance genes and diverse mobile genetic elements with novel insertion sites and genetic organizations.
Collapse
Affiliation(s)
- Mai M Zafer
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ahram Canadian University, Cairo, Egypt
| | - Amira F A Hussein
- Clinical and Chemical Pathology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Mohamed H Al-Agamy
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.,Department of Microbiology and Immunology, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Hesham H Radwan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Samira M Hamed
- Department of Microbiology and Immunology, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza, Egypt
| |
Collapse
|
13
|
Rashvand P, Peymani A, Mohammadi M, Karami A, Samimi R, Hajian S, Porasgari D, Habibollah-Pourzereshki N. Molecular survey of aminoglycoside-resistant Acinetobacter baumannii isolated from tertiary hospitals in Qazvin, Iran. New Microbes New Infect 2021; 42:100883. [PMID: 34094583 PMCID: PMC8165567 DOI: 10.1016/j.nmni.2021.100883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 04/10/2021] [Accepted: 04/19/2021] [Indexed: 11/30/2022] Open
Abstract
Aminoglycoside-modifying enzymes (AMEs) and 16S rRNA methylases (16S RMTase) are two main resistance mechanisms against aminoglycosides. This study aimed to evaluate the frequency of AMEs and 16S rRNA methylase genes among aminoglycoside non-susceptible Acinetobacter baumannii isolates and to assess their clonal relationship using repetitive extragenic palindromic-PCR (rep-PCR). In this cross-sectional study, a total of 192 A. baumannii isolates were collected from the patients hospitalized in Qazvin, Iran (January 2016 to January 2018). Identification of isolates was performed by standard laboratory methods and API 20E strips. Antimicrobial susceptibility was determined by Kirby–Bauer method followed by examination of the genes encoding the AMEs and 16S RMTase by PCR and sequencing methods. The clonal relationship of isolates was carried out by rep-PCR. In total, 98.4% of isolates were non-susceptible to aminoglycosides, 98.4%, 97.9% and 83.9% of isolates were found to be non-susceptible against gentamicin, tobramycin and amikacin, respectively. The frequencies of aph(3′)-VI, aac(6′)-Ib, aac(3)-II, aph(3′)-Ia and armA genes were 59.3%, 39.2%, 39.2%, 31.7% and 69.8%, respectively, either alone or in combination. Rep-PCR results showed that the aminoglycoside non-susceptible isolates belonged to three distinct clones: A (79.4%), B (17.5%) and C (3.2%). The findings of this study showed a high frequency for AMEs with the emergence of armA genes among the aminoglycoside non-susceptible A. baumannii isolates. Rational administration of aminoglycosides as well as using an appropriate infection control policy may reduce the presence of resistance to antibiotics in medical centres. Little is known regarding carbapenem resistance mechanisms in A. baumannii in our region. More than 85% of our isolates were non-susceptible to carbapenems in Qazvin hospitals, Iran. blaOXA-23, blaOXA-24, blaIMP-1, and blaVIM-1 genes is established in carbapenem resistant A. baumannii isolates. Clonal distribution of carbapenem resistant A. baumannii was demonstrated in investigated hospital settings.
Collapse
Affiliation(s)
- P. Rashvand
- Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
| | - A. Peymani
- Medical Microbiology Research Centre, Qazvin University of Medical Sciences, Qazvin, Iran
- Corresponding author: A. Peymani, Medical Microbiology Research Centre, Qazvin University of Medical Sciences, Minoodar, Velayat Hospital, Qazvin, Iran.
| | - M. Mohammadi
- Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
| | - A.A. Karami
- Department of Urology, School of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran
| | - R. Samimi
- Medical Microbiology Research Centre, Qazvin University of Medical Sciences, Qazvin, Iran
| | - S. Hajian
- Department of Nephrology, Velayat Hospital, Qazvin University of Medical Sciences, Qazvin, Iran
| | - D. Porasgari
- Medical Microbiology Research Centre, Qazvin University of Medical Sciences, Qazvin, Iran
| | | |
Collapse
|
14
|
Ngoi ST, Chong CW, Ponnampalavanar SSLS, Tang SN, Idris N, Abdul Jabar K, Gregory MJ, Husain T, Teh CSJ. Genetic mechanisms and correlated risk factors of antimicrobial-resistant ESKAPEE pathogens isolated in a tertiary hospital in Malaysia. Antimicrob Resist Infect Control 2021; 10:70. [PMID: 33892804 PMCID: PMC8062948 DOI: 10.1186/s13756-021-00936-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 04/09/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Knowledge on the epidemiology, genotypic and phenotypic features of antimicrobial-resistant (AMR) ESKAPEE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter spp., and Escherichia coli) and their association with hospital-acquired infections (HAIs) are limited in Malaysia. Therefore, we evaluated the AMR features and resistance mechanisms of the ESKAPEE pathogens collected in a tertiary hospital located in the capital of Malaysia. METHODS A total of 378 AMR-ESKAPEE strains were obtained based on convenience sampling over a nine-month study period (2019-2020). All strains were subjected to disk diffusion and broth microdilution assays to determine the antimicrobial susceptibility profiles. Polymerase chain reaction (PCR) and DNA sequence analyses were performed to determine the AMR genes profiles of the non-susceptible strains. Chi-square test and logistic regression analyses were used to correlate the AMR profiles and clinical data to determine the risk factors associated with HAIs. RESULTS High rates of multidrug resistance (MDR) were observed in A. baumannii, K. pneumoniae, E. coli, and S. aureus (69-89%). All organisms except E. coli were frequently associated with HAIs (61-94%). Non-susceptibility to the last-resort drugs vancomycin (in Enterococcus spp. and S. aureus), carbapenems (in A. baumannii, P. aeruginosa, and Enterobacteriaceae), and colistin (in Enterobacteriaceae) were observed. Both A. baumannii and K. pneumoniae harbored a wide array of extended-spectrum β-lactamase genes (blaTEM, blaSHV, blaCTX-M, blaOXA). Metallo-β-lactamase genes (blaVEB, blaVIM, blaNDM) were detected in carbapenem-resistant strains, at a higher frequency compared to other local reports. We detected two novel mutations in the quinolone-resistant determining region of the gyrA in fluoroquinolone-resistant E. coli (Leu-102-Ala; Gly-105-Val). Microbial resistance to ampicillin, methicillin, and cephalosporins was identified as important risk factors associated with HAIs in the hospital. CONCLUSION Overall, our findings may provide valuable insight into the microbial resistance pattern and the risk factors of ESKAPEE-associated HAIs in a tertiary hospital located in central Peninsular Malaysia. The data obtained in this study may contribute to informing better hospital infection control in this region.
Collapse
Affiliation(s)
- Soo Tein Ngoi
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Chun Wie Chong
- School of Pharmacy, Monash University Malaysia, 47500, Bandar Sunway, Selangor, Malaysia
| | | | - Soo Nee Tang
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Nuryana Idris
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kartini Abdul Jabar
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Michael J Gregory
- United States Naval Medical Research Unit Two (NAMRU-2), Phnom Penh, Cambodia
| | - Tupur Husain
- United States Naval Medical Research Unit Two (NAMRU-2), Phnom Penh, Cambodia
| | - Cindy Shuan Ju Teh
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| |
Collapse
|
15
|
Vrancianu CO, Dobre EG, Gheorghe I, Barbu I, Cristian RE, Chifiriuc MC. Present and Future Perspectives on Therapeutic Options for Carbapenemase-Producing Enterobacterales Infections. Microorganisms 2021; 9:730. [PMID: 33807464 PMCID: PMC8065494 DOI: 10.3390/microorganisms9040730] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/26/2021] [Accepted: 03/30/2021] [Indexed: 12/26/2022] Open
Abstract
Carbapenem-resistant Enterobacterales (CRE) are included in the list of the most threatening antibiotic resistance microorganisms, being responsible for often insurmountable therapeutic issues, especially in hospitalized patients and immunocompromised individuals and patients in intensive care units. The enzymatic resistance to carbapenems is encoded by different β-lactamases belonging to A, B or D Ambler class. Besides compromising the activity of last-resort antibiotics, CRE have spread from the clinical to the environmental sectors, in all geographic regions. The purpose of this review is to present present and future perspectives on CRE-associated infections treatment.
Collapse
Affiliation(s)
- Corneliu Ovidiu Vrancianu
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (C.O.V.); (E.G.D.); (I.B.); (M.C.C.)
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
| | - Elena Georgiana Dobre
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (C.O.V.); (E.G.D.); (I.B.); (M.C.C.)
| | - Irina Gheorghe
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (C.O.V.); (E.G.D.); (I.B.); (M.C.C.)
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
| | - Ilda Barbu
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (C.O.V.); (E.G.D.); (I.B.); (M.C.C.)
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
| | - Roxana Elena Cristian
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania;
| | - Mariana Carmen Chifiriuc
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (C.O.V.); (E.G.D.); (I.B.); (M.C.C.)
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
| |
Collapse
|
16
|
Acinetobacter baumannii Antibiotic Resistance Mechanisms. Pathogens 2021; 10:pathogens10030373. [PMID: 33808905 PMCID: PMC8003822 DOI: 10.3390/pathogens10030373] [Citation(s) in RCA: 203] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/16/2021] [Accepted: 03/18/2021] [Indexed: 12/11/2022] Open
Abstract
Acinetobacter baumannii is a Gram-negative ESKAPE microorganism that poses a threat to public health by causing severe and invasive (mostly nosocomial) infections linked with high mortality rates. During the last years, this pathogen displayed multidrug resistance (MDR), mainly due to extensive antibiotic abuse and poor stewardship. MDR isolates are associated with medical history of long hospitalization stays, presence of catheters, and mechanical ventilation, while immunocompromised and severely ill hosts predispose to invasive infections. Next-generation sequencing techniques have revolutionized diagnosis of severe A. baumannii infections, contributing to timely diagnosis and personalized therapeutic regimens according to the identification of the respective resistance genes. The aim of this review is to describe in detail all current knowledge on the genetic background of A. baumannii resistance mechanisms in humans as regards beta-lactams (penicillins, cephalosporins, carbapenems, monobactams, and beta-lactamase inhibitors), aminoglycosides, tetracyclines, fluoroquinolones, macrolides, lincosamides, streptogramin antibiotics, polymyxins, and others (amphenicols, oxazolidinones, rifamycins, fosfomycin, diaminopyrimidines, sulfonamides, glycopeptide, and lipopeptide antibiotics). Mechanisms of antimicrobial resistance refer mainly to regulation of antibiotic transportation through bacterial membranes, alteration of the antibiotic target site, and enzymatic modifications resulting in antibiotic neutralization. Virulence factors that may affect antibiotic susceptibility profiles and confer drug resistance are also being discussed. Reports from cases of A. baumannii coinfection with SARS-CoV-2 during the COVID-19 pandemic in terms of resistance profiles and MDR genes have been investigated.
Collapse
|
17
|
Chen L, Tan P, Zeng J, Yu X, Cai Y, Liao K, Guo P, Chen Y, Wu Z, Qu P, Cai R, Chen C, Huang B. Impact of an Intervention to Control Imipenem-Resistant Acinetobacter baumannii and Its Resistance Mechanisms: An 8-Year Survey. Front Microbiol 2021; 11:610109. [PMID: 33664711 PMCID: PMC7921317 DOI: 10.3389/fmicb.2020.610109] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/24/2020] [Indexed: 01/09/2023] Open
Abstract
Background This study aimed to examine the impact of an intervention carried out in 2011 to combat multi-drug resistance and outbreaks of imipenem-resistant Acinetobacter baumannii (IRAB), and to explore its resistance mechanism. Methods A total of 2572 isolates of A. baumannii, including 1673 IRAB isolates, were collected between 2007 and 2014. An intervention was implemented to control A. baumannii resistance and outbreaks. Antimicrobial susceptibility was tested by calculating minimal inhibitory concentrations (MICs), and outbreaks were typed using pulsed-field gel electrophoresis (PFGE). Resistance mechanisms were explored by polymerase chain reaction (PCR) and whole genome sequencing (WGS). Results Following the intervention in 2011, the resistance rates of A. baumannii to almost all tested antibiotics decreased, from 85.3 to 72.6% for imipenem, 100 to 80.8% for ceftriaxone, and 45.0 to 6.9% for tigecycline. The intervention resulted in a decrease in the number (seven to five), duration (8–3 months), and departments (five to three) affected by outbreaks; no outbreaks occurred in 2011. After the intervention, only blaAMPC (76.47 to 100%) and blaTEM–1 (75.74 to 96.92%) increased (P < 0.0001); whereas blaGES–1 (32.35 to 3.07%), blaPER–1 (21.32 to 1.54%), blaOXA–58 (60.29 to 1.54%), carO (37.50 to 7.69%), and adeB (9.56 to 3.08%) decreased (P < 0.0001). Interestingly, the frequency of class B β-lactamase genes decreased from 91.18% (blaSPM–1) and 61.03% (blaIMP–1) to 0%, while that of class D blaOXA–23 increased to 96.92% (P < 0.0001). WGS showed that the major PFGE types causing outbreaks each year (type 01, 11, 18, 23, 26, and 31) carried the same resistance genes (blaKPC–1, blaADC–25, blaOXA–66, and adeABC), AdeR-S mutations (G186V and A136V), and a partially blocked porin channel CarO. Meanwhile, plasmids harboring blaOXA–23 were found after the intervention. Conclusion The intervention was highly effective in reducing multi-drug resistance of A. baumannii and IRAB outbreaks in the long term. The resistance mechanisms of IRAB may involve genes encoding β-lactamases, efflux pump overexpression, outer membrane porin blockade, and plasmids; in particular, clonal spread of blaOXA–23 was the major cause of outbreaks. Similar interventions may also help reduce bacterial resistance rates and outbreaks in other hospitals.
Collapse
Affiliation(s)
- Lida Chen
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Blood Transfusion, China-Japan Friendship Hospital, Beijing, China
| | - Pinghai Tan
- Department of Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jianming Zeng
- Department of Laboratory Medicine, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China.,Department of Laboratory Medicine, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Xuegao Yu
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yimei Cai
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Kang Liao
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Penghao Guo
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yili Chen
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zongwen Wu
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Pinghua Qu
- Department of Laboratory Medicine, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China.,Department of Laboratory Medicine, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Renxin Cai
- Department of Laboratory Medicine, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China.,Department of Laboratory Medicine, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Cha Chen
- Department of Laboratory Medicine, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China.,Department of Laboratory Medicine, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Bin Huang
- Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
18
|
Jouybari MA, Ahanjan M, Mirzaei B, Goli HR. Role of aminoglycoside-modifying enzymes and 16S rRNA methylase (ArmA) in resistance of Acinetobacter baumannii clinical isolates against aminoglycosides. Rev Soc Bras Med Trop 2021; 54:e05992020. [PMID: 33533819 PMCID: PMC7849326 DOI: 10.1590/0037-8682-0599-2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/12/2020] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION: This study aimed to determine the role of genes encoding aminoglycoside-modifying enzymes (AMEs) and 16S rRNA methylase (ArmA) in Acinetobacter baumannii clinical isolates. METHODS: We collected 100 clinical isolates of A. baumannii and identified and confirmed them using microbiological tests and assessment of the OXA-51 gene. Antibiotic susceptibility testing was carried out using disk agar diffusion and micro-broth dilution methods. The presence of AME genes and ArmA was detected by PCR and multiplex PCR. RESULTS: The most and least effective antibiotics in this study were netilmicin and ciprofloxacin with 68% and 100% resistance rates, respectively. According to the minimum inhibitory concentration test, 94% of the isolates were resistant to gentamicin, tobramycin, and streptomycin, while the highest susceptibility (20%) was observed against netilmicin. The proportion of strains harboring the aminoglycoside resistance genes was as follows: APH(3′)-VIa (aphA6) (77%), ANT(2”)-Ia (aadB) (73%), ANT(3”)-Ia (aadA1) (33%), AAC(6′)-Ib (aacA4) (33%), ArmA (22%), and AAC(3)-IIa (aacC2) (19%). Among the 22 gene profiles detected in this study, the most prevalent profiles included APH(3′)-VIa + ANT(2”)-Ia (39 isolates, 100% of which were kanamycin-resistant), and AAC(3)-IIa + AAC(6′)-Ib + ANT(3”)-Ia + APH(3′)-VIa + ANT(2”)-Ia (14 isolates, all of which were resistant to gentamicin, kanamycin, and streptomycin). CONCLUSIONS: High minimum inhibitory concentration of aminoglycosides in isolates with the simultaneous presence of AME- and ArmA-encoding genes indicated the importance of these genes in resistance to aminoglycosides. However, control of their spread could be effective in the treatment of infections caused by A. baumannii.
Collapse
Affiliation(s)
- Maryam Asadi Jouybari
- Mazandaran University of Medical Sciences, Faculty of Medicine, Molecular and Cell Biology Research Centre, Sari, Iran.,Mazandaran University of Medical Sciences, Faculty of Medicine, Department of Medical Microbiology and Virology, Sari, Iran
| | - Mohammad Ahanjan
- Mazandaran University of Medical Sciences, Faculty of Medicine, Molecular and Cell Biology Research Centre, Sari, Iran.,Mazandaran University of Medical Sciences, Faculty of Medicine, Department of Medical Microbiology and Virology, Sari, Iran
| | - Bahman Mirzaei
- Zanjan University of Medical Sciences, School of Medicine, Department of Medical Microbiology and Virology, Zanjan, Iran
| | - Hamid Reza Goli
- Mazandaran University of Medical Sciences, Faculty of Medicine, Molecular and Cell Biology Research Centre, Sari, Iran.,Mazandaran University of Medical Sciences, Faculty of Medicine, Department of Medical Microbiology and Virology, Sari, Iran
| |
Collapse
|
19
|
Kishk R, Soliman N, Nemr N, Eldesouki R, Mahrous N, Gobouri A, Azab E, Anani M. Prevalence of Aminoglycoside Resistance and Aminoglycoside Modifying Enzymes in Acinetobacter baumannii Among Intensive Care Unit Patients, Ismailia, Egypt. Infect Drug Resist 2021; 14:143-150. [PMID: 33519215 PMCID: PMC7838519 DOI: 10.2147/idr.s290584] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 12/18/2020] [Indexed: 12/13/2022] Open
Abstract
Background Acinetobacter baumannii is an opportunistic pathogen that rapidly develops antibiotic resistance against commonly prescribed antimicrobial agents in hospitalized patients worldwide. Aminoglycosides are commonly used in the treatment of A. baumannii health care-associated infections (HAIs). Aminoglycosides resistance mechanisms are varied and commonly involve production of aminoglycoside-modifying enzymes (AME) and efflux systems. Aim This study aimed to provide an insight into the frequency of genes encoding AME in A. baumannii strains isolated from different clinical specimens in intensive care units (ICU). Methodology A total of 52 multidrug-resistant (MDR) A. baumannii strains were isolated from ICU, Suez Canal University Hospitals. Species identification and antibiotics susceptibility testing were done by the automated system VITEK 2. The genes encoding AME were detected by PCR. Results Aminoglycosides resistance (amikacin, gentamicin and tobramycin) was observed in 35 isolates (67.3%). We found that aacC1 gene was the predominant AME resistance gene among A. baumannii isolates, detected in 14 isolates (40%), aphA6 in 11 isolates (31.4%) and addA1 in 5 isolates (14.2%). We found 5 isolates containing 2 AME genes, 3 of them with aacC1 and aphA6 and the remaining 2 with both aacC1 and aadA1 genes. Nearly, 5 isolates (14.2%) were negative for all AME resistance genes. Conclusion Our study indicated that AME encoding genes are predominant in A. baumannii strains in our region which stressed on the importance of preventive measures to control spreading of resistance genes.
Collapse
Affiliation(s)
- Rania Kishk
- Microbiology and Immunology Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Nourhan Soliman
- Clinical Pathology Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Nader Nemr
- Endemic and Infectious Diseases Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Raghda Eldesouki
- Genetics Unit, Histology Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Nageh Mahrous
- Endemic and Infectious Diseases Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Adil Gobouri
- Department of Chemistry, College of Science, Taif University, Taif 21944, Saudi Arabia
| | - Ehab Azab
- Department of Biotechnology, College of Science, Taif University, Taif 21944, Saudi Arabia
| | - Maha Anani
- Clinical Pathology Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| |
Collapse
|
20
|
Madhi M, Hasani A, Mojarrad JS, Rezaee MA, Zarrini G, Davaran S. Nano-strategies in pursuit of efflux pump activeness in Acinetobacter baumannii and Pseudomonas aeruginosa. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
21
|
Roe C, Williamson CHD, Vazquez AJ, Kyger K, Valentine M, Bowers JR, Phillips PD, Harrison V, Driebe E, Engelthaler DM, Sahl JW. Bacterial Genome Wide Association Studies (bGWAS) and Transcriptomics Identifies Cryptic Antimicrobial Resistance Mechanisms in Acinetobacter baumannii. Front Public Health 2020; 8:451. [PMID: 33014966 PMCID: PMC7493718 DOI: 10.3389/fpubh.2020.00451] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 07/21/2020] [Indexed: 12/14/2022] Open
Abstract
Antimicrobial resistance (AMR) in the nosocomial pathogen, Acinetobacter baumannii, is becoming a serious public health threat. While some mechanisms of AMR have been reported, understanding novel mechanisms of resistance is critical for identifying emerging resistance. One of the first steps in identifying novel AMR mechanisms is performing genotype/phenotype association studies; however, performing these studies is complicated by the plastic nature of the A. baumannii pan-genome. In this study, we compared the antibiograms of 12 antimicrobials associated with multiple drug families for 84 A. baumannii isolates, many isolated in Arizona, USA. in silico screening of these genomes for known AMR mechanisms failed to identify clear correlations for most drugs. We then performed a bacterial genome wide association study (bGWAS) looking for associations between all possible 21-mers; this approach generally failed to identify mechanisms that explained the resistance phenotype. In order to decrease the genomic noise associated with population stratification, we compared four phylogenetically-related pairs of isolates with differing susceptibility profiles. RNA-Sequencing (RNA-Seq) was performed on paired isolates and differentially-expressed genes were identified. In these isolate pairs, five different potential mechanisms were identified, highlighting the difficulty of broad AMR surveillance in this species. To verify and validate differential expression, amplicon sequencing was performed. These results suggest that a diagnostic platform based on gene expression rather than genomics alone may be beneficial in certain surveillance efforts. The implementation of such advanced diagnostics coupled with increased AMR surveillance will potentially improve A. baumannii infection treatment and patient outcomes.
Collapse
Affiliation(s)
- Chandler Roe
- Northern Arizona University, Flagstaff, AZ, United States
| | | | | | - Kristen Kyger
- Northern Arizona University, Flagstaff, AZ, United States
| | - Michael Valentine
- Translational Genomics Research Institute, Flagstaff, AZ, United States
| | - Jolene R. Bowers
- Translational Genomics Research Institute, Flagstaff, AZ, United States
| | | | - Veronica Harrison
- Translational Genomics Research Institute, Flagstaff, AZ, United States
| | - Elizabeth Driebe
- Translational Genomics Research Institute, Flagstaff, AZ, United States
| | | | - Jason W. Sahl
- Northern Arizona University, Flagstaff, AZ, United States
| |
Collapse
|
22
|
Khurshid M, Rasool MH, Ashfaq UA, Aslam B, Waseem M, Ali MA, Almatroudi A, Rasheed F, Saeed M, Guo Q, Wang M. Acinetobacter baumannii Sequence Types Harboring Genes Encoding Aminoglycoside Modifying Enzymes and 16SrRNA Methylase; a Multicenter Study from Pakistan. Infect Drug Resist 2020; 13:2855-2862. [PMID: 32884309 PMCID: PMC7443399 DOI: 10.2147/idr.s260643] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/29/2020] [Indexed: 12/20/2022] Open
Abstract
Introduction The aminoglycosides are widely used for the therapeutic management of infections caused by gram-negative bacteria, including the Acinetobacter baumannii strains. However, the resistance to the members of the aminoglycoside family, such as amikacin, gentamicin, and tobramycin, is increasingly being common among the clinical isolates. Purpose This study aimed to investigate the presence of 16SrRNA methylases and aminoglycoside modifying enzymes (AMEs) genes among aminoglycoside resistant A. baumannii isolates and to study the genetic diversity of the clinical population of A. baumannii in local hospitals. Material and Methods The 143 A. baumannii clinical strains were analyzed for antimicrobial susceptibility, genetic screening for enzymes conferring aminoglycosides resistance followed by the multilocus sequence typing. Results The 133/143 (93%) isolates were non-susceptible to at least one of the tested aminoglycosides, including amikacin, gentamicin, and tobramycin. The MIC distribution has shown that 87.486.7% strains were resistant to amikacin and gentamicin, respectively. The aphA6, aadB, aacC1, and aphA1 were found in 74.1%, 59.4%, 16.1%, and 11.2% isolates, respectively, whereas the armA was found in 28% of the strains having a higher MIC value (MIC; ≥256µg/mL). The MLST data have shown that the ST589 and ST2 were the most common STs and corresponded to 51 (35.7%) and 38 (26.6%) isolates, respectively, and few of the isolates corresponding to these STs were found to harbor the armA gene with a variable genotypic profile for AMEs. Discussion The study has reported the incidence of various enzymes conferring aminoglycoside resistance among the A. baumannii clones for the first time from Pakistan. The findings suggest the possibility of transmission of aminoglycoside resistance determinants through the lateral gene transfer as well as clonal dissemination.
Collapse
Affiliation(s)
- Mohsin Khurshid
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai 200040, People's Republic of China.,Department of Microbiology, Government College University, Faisalabad, Pakistan
| | | | - Usman Ali Ashfaq
- Department of Bioinformatics & Biotechnology, Government College University, Faisalabad, Pakistan
| | - Bilal Aslam
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Muhammad Waseem
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | | | - Ahmad Almatroudi
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah, Saudi Arabia
| | - Farhan Rasheed
- Allama Iqbal Medical College, Jinnah Hospital Lahore, Lahore, Pakistan
| | - Muhammad Saeed
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Qinglan Guo
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai 200040, People's Republic of China
| | - Minggui Wang
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai 200040, People's Republic of China
| |
Collapse
|
23
|
Antibiotic Resistance Profiles, Molecular Mechanisms and Innovative Treatment Strategies of Acinetobacter baumannii. Microorganisms 2020; 8:microorganisms8060935. [PMID: 32575913 PMCID: PMC7355832 DOI: 10.3390/microorganisms8060935] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/19/2020] [Accepted: 06/19/2020] [Indexed: 12/18/2022] Open
Abstract
Antibiotic resistance is one of the biggest challenges for the clinical sector and industry, environment and societal development. One of the most important pathogens responsible for severe nosocomial infections is Acinetobacter baumannii, a Gram-negative bacterium from the Moraxellaceae family, due to its various resistance mechanisms, such as the β-lactamases production, efflux pumps, decreased membrane permeability and altered target site of the antibiotic. The enormous adaptive capacity of A. baumannii and the acquisition and transfer of antibiotic resistance determinants contribute to the ineffectiveness of most current therapeutic strategies, including last-line or combined antibiotic therapy. In this review, we will present an update of the antibiotic resistance profiles and underlying mechanisms in A. baumannii and the current progress in developing innovative strategies for combating multidrug-resistant A. baumannii (MDRAB) infections.
Collapse
|
24
|
Da Cunda P, Iribarnegaray V, Papa-Ezdra R, Bado I, González MJ, Zunino P, Vignoli R, Scavone P. Characterization of the Different Stages of Biofilm Formation and Antibiotic Susceptibility in a Clinical Acinetobacter baumannii Strain. Microb Drug Resist 2020; 26:569-575. [DOI: 10.1089/mdr.2019.0145] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Paula Da Cunda
- Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Victoria Iribarnegaray
- Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Romina Papa-Ezdra
- Departamento de Bacteriología y Virología, Facultad de Medicina, Instituto de Higiene, Montevideo, Uruguay
| | - Inés Bado
- Departamento de Bacteriología y Virología, Facultad de Medicina, Instituto de Higiene, Montevideo, Uruguay
| | - María José González
- Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Pablo Zunino
- Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Rafael Vignoli
- Departamento de Bacteriología y Virología, Facultad de Medicina, Instituto de Higiene, Montevideo, Uruguay
| | - Paola Scavone
- Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| |
Collapse
|
25
|
Ayoub Moubareck C, Hammoudi Halat D. Insights into Acinetobacter baumannii: A Review of Microbiological, Virulence, and Resistance Traits in a Threatening Nosocomial Pathogen. Antibiotics (Basel) 2020; 9:antibiotics9030119. [PMID: 32178356 PMCID: PMC7148516 DOI: 10.3390/antibiotics9030119] [Citation(s) in RCA: 212] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/01/2020] [Accepted: 03/02/2020] [Indexed: 12/12/2022] Open
Abstract
Being a multidrug-resistant and an invasive pathogen, Acinetobacter baumannii is one of the major causes of nosocomial infections in the current healthcare system. It has been recognized as an agent of pneumonia, septicemia, meningitis, urinary tract and wound infections, and is associated with high mortality. Pathogenesis in A. baumannii infections is an outcome of multiple virulence factors, including porins, capsules, and cell wall lipopolysaccharide, enzymes, biofilm production, motility, and iron-acquisition systems, among others. Such virulence factors help the organism to resist stressful environmental conditions and enable development of severe infections. Parallel to increased prevalence of infections caused by A. baumannii, challenging and diverse resistance mechanisms in this pathogen are well recognized, with major classes of antibiotics becoming minimally effective. Through a wide array of antibiotic-hydrolyzing enzymes, efflux pump changes, impermeability, and antibiotic target mutations, A. baumannii models a unique ability to maintain a multidrug-resistant phenotype, further complicating treatment. Understanding mechanisms behind diseases, virulence, and resistance acquisition are central to infectious disease knowledge about A. baumannii. The aims of this review are to highlight infections and disease-producing factors in A. baumannii and to touch base on mechanisms of resistance to various antibiotic classes.
Collapse
Affiliation(s)
- Carole Ayoub Moubareck
- College of Natural and Health Sciences, Zayed University, Dubai P.O. Box 144534, UAE
- Correspondence: ; Tel.: +971-4-402-1745
| | - Dalal Hammoudi Halat
- Department of Pharmaceutical Sciences, School of Pharmacy, Lebanese International University, Beirut, Bekaa Campuses 1103, Lebanon;
| |
Collapse
|
26
|
Polotto M, Casella T, Tolentino FM, Mataruco MM, Porto NKM, Binhardi MFB, Nogueira MCL. Investigation of carbapenemases and aminoglycoside modifying enzymes of Acinetobacter baumannii isolates recovered from patients admitted to intensive care units in a tertiary-care hospital in Brazil. Rev Soc Bras Med Trop 2019; 53:e20190044. [PMID: 31859941 PMCID: PMC7083385 DOI: 10.1590/0037-8682-0094-2019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 08/13/2019] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION: Acinetobacter baumannii are opportunistic bacteria, highly
capable of acquiring antimicrobial resistance through the production of
carbapenemases and aminoglycoside modifying enzymes (AMEs). METHODS: Carbapenemase and AME genes were investigated in A.
baumannii recovered from inpatients of a Brazilian hospital. RESULTS: The key genes found were blaOXA-51-like, the association ISAba1- blaOXA-23-like, and the AME genes aph(3´)-VI, aac(6´)-Ib,
aac(3)-Ia, and aph(3´)-Ia. Different clusters
spread through the institution wards. CONCLUSIONS: The dissemination of blaOXA-23-like and AME-carrying A. baumannii
through the hospital highlights the need for improved preventive measures to
reduce the spread of infection.
Collapse
Affiliation(s)
- Milena Polotto
- Instituto Adolfo Lutz, Centro de Laboratório Regional de São José do Rio Preto, São José do Rio Preto, SP, Brasil.,Faculdade de Medicina de São José do Rio Preto, Centro de Investigação de Microrganismos, São José do Rio Preto, SP, Brasil
| | - Tiago Casella
- Faculdade de Medicina de São José do Rio Preto, Centro de Investigação de Microrganismos, São José do Rio Preto, SP, Brasil
| | - Fernanda Modesto Tolentino
- Instituto Adolfo Lutz, Centro de Laboratório Regional de São José do Rio Preto, São José do Rio Preto, SP, Brasil.,Faculdade de Medicina de São José do Rio Preto, Centro de Investigação de Microrganismos, São José do Rio Preto, SP, Brasil
| | | | - Naiady Konno Madela Porto
- Faculdade de Medicina de São José do Rio Preto, Centro de Investigação de Microrganismos, São José do Rio Preto, SP, Brasil
| | | | - Mara Corrêa Lelles Nogueira
- Faculdade de Medicina de São José do Rio Preto, Centro de Investigação de Microrganismos, São José do Rio Preto, SP, Brasil
| |
Collapse
|
27
|
Amin M, Navidifar T, Shooshtari FS, Rashno M, Savari M, Jahangirmehr F, Arshadi M. Association Between Biofilm Formation, Structure, and the Expression Levels of Genes Related to biofilm formation and Biofilm-Specific Resistance of Acinetobacter baumannii Strains Isolated from Burn Infection in Ahvaz, Iran. Infect Drug Resist 2019; 12:3867-3881. [PMID: 31853190 PMCID: PMC6914661 DOI: 10.2147/idr.s228981] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 11/15/2019] [Indexed: 12/18/2022] Open
Abstract
Background The ability of biofilm formation is an effective way for Acinetobacter baumannii survival from stressed conditions. This present study was aimed to evaluate the association between biofilm formation, structure, the expression levels of genes related to biofilm formation and biofilm-specific resistance of A. baumannii strains isolated from burn infections in Ahvaz, Iran. Methods In this study, we assessed the antibiotic susceptibilities, ERIC-PCR typing, capacity of biofilm formation and biofilm structure of 64 A. baumannii isolates collected from burn infections. The distribution and the expression levels of genes involved in the biofilm formation including bap, ompA, abaI, pgaA and csuE were assessed by PCR and real-time PCR, respectively. Results We classified A. baumannii isolates in 14 clonal types of ERIC-PCR. Most A. baumannii isolates were resistant to all antibiotics tested except to tigecycline and colistin and had the biofilm formation capability but with different capacities. There was a significant inverse relationship between resistance to antibiotic agents and biofilm formation. The biofilm matrix of 50 strains consisted of polysaccharides together with DNA or proteins. The genes involved in the biofilm formation were detected in both biofilm-forming and non-biofilm forming; however, the expression levels of these genes were higher in biofilm producers compared with non-producers. Conclusion The biofilm cells exhibited dramatically decreased susceptibility to antibiotic agents; hence, they have great significance for public health. Therefore, the determination of antibiotic susceptibilities in biofilm and planktonic mode, molecular typing, and capacity of biofilm formation in clinical setting is essential.
Collapse
Affiliation(s)
- Mansour Amin
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Microbiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Tahereh Navidifar
- Department of Microbiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Farkhondeh Saleh Shooshtari
- Department of Microbiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Infertility Research and Treatment Center of Jahad Daneshgahi, Ahvaz, Khuzestan, Iran
| | - Mohammad Rashno
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Immunology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Savari
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Microbiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Fatemeh Jahangirmehr
- Pain Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mania Arshadi
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| |
Collapse
|
28
|
da Paz Pereira JN, de Andrade CADN, da Costa Lima JL, de Lima Neto RG, de Araújo PSR, Maciel MAV. Clonal Dissemination of Clinical Isolates of Acinetobacter baumannii Carriers of 16S rRNA Methylase Genes in an Oncological Hospital in Recife, Brazil. Curr Microbiol 2019; 77:32-39. [DOI: 10.1007/s00284-019-01786-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 10/04/2019] [Indexed: 10/25/2022]
|
29
|
Draft Genome Sequences of Three Human Pathogenic Acinetobacter baumannii Strains. Microbiol Resour Announc 2019; 8:8/14/e01742-18. [PMID: 30948474 PMCID: PMC6449565 DOI: 10.1128/mra.01742-18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Acinetobacter baumannii is an opportunistic human pathogen with the ability to develop multiple resistances against the main antibiotic classes. It causes nosocomial infections, especially in intensive care units. Acinetobacter baumannii is an opportunistic human pathogen with the ability to develop multiple resistances against the main antibiotic classes. It causes nosocomial infections, especially in intensive care units. Here, we present the draft genome sequences of three isolates (AB1, AB2, and AB3) from humans, collected from two hospitals in Tabriz, Iran.
Collapse
|
30
|
Osimani A, Milanović V, Cardinali F, Garofalo C, Clementi F, Ruschioni S, Riolo P, Isidoro N, Loreto N, Galarini R, Moretti S, Petruzzelli A, Micci E, Tonucci F, Aquilanti L. Distribution of Transferable Antibiotic Resistance Genes in Laboratory-Reared Edible Mealworms ( Tenebrio molitor L.). Front Microbiol 2018; 9:2702. [PMID: 30510544 PMCID: PMC6252353 DOI: 10.3389/fmicb.2018.02702] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 10/23/2018] [Indexed: 11/25/2022] Open
Abstract
In the present study, the distribution of antibiotic resistance genes in laboratory-reared fresh mealworm larvae (Tenebrio molitor L.), their feeding substrates (carrots and wheatmeal), and frass was assessed. Microbial counts on selective media added with antibiotics highlighted the presence of lactic acid bacteria resistant to ampicillin and vancomycin and, more specifically, enterococci resistant to the latter antibiotic. Moreover, staphylococci resistant to gentamicin, erythromycin, tetracycline, and vancomycin were detected. Enterobacteriaceae resistant to ampicillin and gentamicin were also found, together with Pseudomonadaceae resistant to gentamicin. Some of the genes coding for resistance to macrolide-lincosamide-streptogramin B (MLSB) [erm(A), erm(C)], vancomycin [vanA, vanB], tetracycline [tet(O)], and β-lactams [mecA and blaZ] were absent in all of the samples. For the feeding substrates, organic wheatmeal was positive for tet(S) and tet(K), whereas no AR genes were detected in organic carrots. The genes tet(M), tet(K), and tet(S) were detected in both mealworms and frass, whereas gene aac-aph, coding for resistance to amynoglicosides was exclusively detected in frass. No residues for any of the 64 antibiotics belonging to 10 different drug classes were found in either the organic wheatmeal or carrots. Based on the overall results, the contribution of feed to the occurrence of antibiotic resistance (AR) genes and/or antibiotic-resistant microorganisms in mealworm larvae was hypothesized together with vertical transmission via insect egg smearing.
Collapse
Affiliation(s)
- Andrea Osimani
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Vesna Milanović
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Federica Cardinali
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Cristiana Garofalo
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Francesca Clementi
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Sara Ruschioni
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Paola Riolo
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Nunzio Isidoro
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Nino Loreto
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Roberta Galarini
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Perugia, Italy
| | - Simone Moretti
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Perugia, Italy
| | - Annalisa Petruzzelli
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Centro di Riferimento Regionale Autocontrollo, Pesaro, Italy
| | - Eleonora Micci
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Centro di Riferimento Regionale Autocontrollo, Pesaro, Italy
| | - Franco Tonucci
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Centro di Riferimento Regionale Autocontrollo, Pesaro, Italy
| | - Lucia Aquilanti
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| |
Collapse
|
31
|
Salimizand H, Zomorodi AR, Mansury D, Khakshoor M, Azizi O, Khodaparast S, Baseri Z, Karami P, Zamanlou S, Farsiani H, Amini Y, Moradi B, Meshkat Z, Salimizand H, Hasanzadeh S, Sadeghian H. Diversity of aminoglycoside modifying enzymes and 16S rRNA methylases in Acinetobacter baumannii and Acinetobacter nosocomialis species in Iran; wide distribution of aadA1 and armA. INFECTION GENETICS AND EVOLUTION 2018; 66:195-199. [PMID: 30292703 DOI: 10.1016/j.meegid.2018.09.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 09/12/2018] [Accepted: 09/30/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE Acinetobacter baumannii-calcoaceticus complex (ABC) make a great burden on health-care systems due to hospital-acquired infections and antibacterial resistance. Aminoglycoside in combination with other antibacterials used as treatment options. However, ABC species overcome this class of antibacterials in different ways. This study provides a comprehensive report on the distribution of aminoglycoside modifying enzymes (AMEs) and 16S rRNA methylase in Acinetobacter baumannii and Acinetobacter nosocomialis isolated from various provinces in Iran. METHODS During six month of study, from eight referral centers in seven provinces across the country, Iran, 178 A. baumannii and 43 A. nosocomialis isolates were collected. The minimum inhibitory concentration of amikacin, gentamicin, netilmicin, kanamycin and tobramycin were measured by microbroth dilution method. AMEs and 16S rRNA methylase variants were sought by PCR. RESULTS High rates of resistance were seen in all centers. MIC50 and MIC90 for all A. baumannii and A. nosocomialis isolates from different centers were > 512 mg/L. The most frequent AME was ant(3″)-Ia (aadA1) in both of A. baumannii (74.1%) and A. nosocomialis (86%). armA was detected in A. baumannii and A. nosocomialis at the frequency of 41.6% and 67.4%, respectively. rmtA, B, C, D, aac(3)-Ia (aacC1) and aac(6')-Im were not detected, neither in A. baumannii nor A. nosocomialis. Moreover, aac(6')-Ih was only found in A. baumannii isolates. The distribution of some of the ARGs was limited to a definite center. CONCLUSION The overall high-level carriage of ARGs in Acinetobacter species may limited usage of this class of antibacterials as a treatment option.
Collapse
Affiliation(s)
- Himen Salimizand
- Liver and Digestive Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran; Department of Microbiology, Faculty of Medicine, Kurdistan University of medical Sciences, Sanandaj, Iran
| | - Abolfazl Raafati Zomorodi
- Department of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi university of Mashhad, Mashhad, Iran
| | - Davood Mansury
- Student Research Committee, Faculty of Medicine, Mashhad, University of Medical Sciences, Mashhad, Iran; Antimicrobial Resistance Research Center, Avicenna Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Microbiology and Virology, Medical School, Mashhad University of medical Sciences, Mashhad, Iran
| | - Mostafa Khakshoor
- Microbiology Department, Faculty of science, Islamic Azad University of Tonekabon, Iran
| | - Omid Azizi
- Department of Laboratory Sciences, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Sepideh Khodaparast
- Department of bacteriology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran; Molecular laboratory, Shariati hospital, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Zohre Baseri
- Molecular laboratory, Shariati hospital, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Pezhman Karami
- Department of Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran; Brucellosis Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sajjad Zamanlou
- Department of Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Farsiani
- Antimicrobial Resistance Research Center, Avicenna Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Microbiology and Virology, Medical School, Mashhad University of medical Sciences, Mashhad, Iran
| | - Yousef Amini
- Department of Microbiology, Medical school, Zahedan University of medical Sciences, Zahedan, Iran; Infectious Diseases and Tropical Medicine Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Bagher Moradi
- Esfarayen University of Medical Sciences, Esfarayen, Iran
| | - Zahra Meshkat
- Antimicrobial Resistance Research Center, Avicenna Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Microbiology and Virology, Medical School, Mashhad University of medical Sciences, Mashhad, Iran
| | - Hana Salimizand
- Department of Biology, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
| | - Sepideh Hasanzadeh
- Student Research Committee, Faculty of Medicine, Mashhad, University of Medical Sciences, Mashhad, Iran; Antimicrobial Resistance Research Center, Avicenna Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Microbiology and Virology, Medical School, Mashhad University of medical Sciences, Mashhad, Iran
| | - Hamid Sadeghian
- Antimicrobial Resistance Research Center, Avicenna Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
| |
Collapse
|
32
|
Qin H, Lo NWS, Loo J, Lin X, Yim AKY, Tsui SKW, Lau TCK, Ip M, Chan TF. Comparative transcriptomics of multidrug-resistant Acinetobacter baumannii in response to antibiotic treatments. Sci Rep 2018; 8:3515. [PMID: 29476162 PMCID: PMC5824817 DOI: 10.1038/s41598-018-21841-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 02/05/2018] [Indexed: 11/16/2022] Open
Abstract
Multidrug-resistant Acinetobacter baumannii, a major hospital-acquired pathogen, is a serious health threat and poses a great challenge to healthcare providers. Although there have been many genomic studies on the evolution and antibiotic resistance of this species, there have been very limited transcriptome studies on its responses to antibiotics. We conducted a comparative transcriptomic study on 12 strains with different growth rates and antibiotic resistance profiles, including 3 fast-growing pan-drug-resistant strains, under separate treatment with 3 antibiotics, namely amikacin, imipenem, and meropenem. We performed deep sequencing using a strand-specific RNA-sequencing protocol, and used de novo transcriptome assembly to analyze gene expression in the form of polycistronic transcripts. Our results indicated that genes associated with transposable elements generally showed higher levels of expression under antibiotic-treated conditions, and many of these transposon-associated genes have previously been linked to drug resistance. Using co-expressed transposon genes as markers, we further identified and experimentally validated two novel genes of which overexpression conferred significant increases in amikacin resistance. To the best of our knowledge, this study represents the first comparative transcriptomic analysis of multidrug-resistant A. baumannii under different antibiotic treatments, and revealed a new relationship between transposons and antibiotic resistance.
Collapse
Affiliation(s)
- Hao Qin
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Partner State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong SAR, China
- 3D Medicines Corporation, Shanghai, China
| | - Norman Wai-Sing Lo
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Jacky Loo
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Xiao Lin
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Partner State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Aldrin Kay-Yuen Yim
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Partner State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Washington University School of Medicine, Saint Louis, MO, USA
| | - Stephen Kwok-Wing Tsui
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Terrence Chi-Kong Lau
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong SAR, China
| | - Margaret Ip
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ting-Fung Chan
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China.
- Partner State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong SAR, China.
| |
Collapse
|
33
|
Bardbari AM, Arabestani MR, Karami M, Keramat F, Aghazadeh H, Alikhani MY, Bagheri KP. Highly synergistic activity of melittin with imipenem and colistin in biofilm inhibition against multidrug-resistant strong biofilm producer strains of Acinetobacter baumannii. Eur J Clin Microbiol Infect Dis 2018; 37:443-454. [DOI: 10.1007/s10096-018-3189-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/08/2018] [Indexed: 01/10/2023]
|
34
|
Osimani A, Cardinali F, Aquilanti L, Garofalo C, Roncolini A, Milanović V, Pasquini M, Tavoletti S, Clementi F. Occurrence of transferable antibiotic resistances in commercialized ready-to-eat mealworms (Tenebrio molitor L.). Int J Food Microbiol 2017; 263:38-46. [PMID: 29028569 DOI: 10.1016/j.ijfoodmicro.2017.10.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 09/06/2017] [Accepted: 10/03/2017] [Indexed: 12/18/2022]
Abstract
The present study aimed to assess the occurrence of transferable determinants conferring resistance to tetracyclines, macrolide-lincosamide-streptogramin B, vancomycin, beta-lactams, and aminoglycosides in 40 samples of commercialized edible mealworms (Tenebrio molitor L.) purchased from European Union (EU) and non-EU producers. A high prevalence of tet(K) was observed in all of the samples assayed, with percentages of PCR-based positivity that ranged from 80% (samples from Thailand) to 100% (samples from the Netherlands, Belgium and France). For macrolides, erm(B) prevailed, being detected in 57.5% of the samples assayed, whereas erm(A) and erm(C) were detected with lower frequencies. Genes for resistance to vancomycin were only detected in samples produced in France and Belgium, with 90% and 10% of the samples being positive for vanA, respectively. Beta-lactamase genes were found with low occurrence, whereas the gene aac-aph, conferring high resistance to aminoglycosides, was found in 40% of the samples produced in the Netherlands and Belgium and 20% of the samples produced in Thailand. The results of Principal Coordinate Analysis and Principal Component Analysis depicted a clean separation of the samples collected from the four producers based on the distribution of the 12 AR determinants considered. Given the growing interest on the use of mealworms as a novel protein source, AR detection frequencies found in the present study suggest further investigation into the use of antibiotics during rearing of this insect species and more extensive studies focused on the factors that can affect the diffusion of transferable ARs in the production chain. Until such studies are completed, prudent use of antibiotics during rearing of edible insects is recommended.
Collapse
Affiliation(s)
- Andrea Osimani
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Federica Cardinali
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Lucia Aquilanti
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy.
| | - Cristiana Garofalo
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Andrea Roncolini
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Vesna Milanović
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Marina Pasquini
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Stefano Tavoletti
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Francesca Clementi
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| |
Collapse
|