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Kipsang F, Munyiva J, Menza N, Musyoki A. Carbapenem-resistant Acinetobacter baumannii infections: Antimicrobial resistance patterns and risk factors for acquisition in a Kenyan intensive care unit. IJID REGIONS 2023; 9:111-116. [PMID: 38020185 PMCID: PMC10652105 DOI: 10.1016/j.ijregi.2023.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/17/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023]
Abstract
Objectives Multidrug-resistant (MDR) Acinetobacter baumannii (AB), especially carbapenem-resistant (CR) strains, presents a significant challenge in intensive care units (ICUs) but surveillance data in many resource-constrained countries is inadequate. Here, we determined the prevalence of MDRAB and risk factors for infection and mortality in ICU-admitted patients. Methods A cross-sectional study among 132 consecutive patients between July 2019 and July 2020, with infected patients followed for 30 days from sample collection to ICU discharge/death. Blood, urine, and tracheal aspirate samples were processed following the standard bacteriological procedures. Isolate identity and antimicrobial susceptibility were elucidated by VITEK 2 Compact system. Results The prevalence of MDRAB was 22.7% (30/132), mostly from urine samples (12.1%, 16/132), and dominated by CRAB (83.3%) that were colistin-nonresistant and exhibited high multiple antibiotic resistance indices, ranging from 0.64-0.91. Risk factors for infection were occupation (adjusted odds ratio = 4.41, P = 0.016) and interhospital referral status (adjusted odds ratio = 0.14, P = 0.001). ICU mortality was 20% (6/30). Conclusion Our findings underpin the need for strict adherence to and evaluation of infection prevention and control, and continuous surveillance of CRAB in ICU, especially among the risk groups, in the current study setting and beyond.
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Affiliation(s)
- Fred Kipsang
- Department of Biomedical Sciences, Kabarak University, P.O. Private Bag 20157, Nakuru, Kenya
| | - Jeniffer Munyiva
- Department of Laboratory Medicine, Kenyatta National Hospital, P.O. Box 20723-00202, Nairobi, Kenya
| | - Nelson Menza
- Department of Medical Laboratory Sciences, Kenyatta University, P.O. BOX 43844-00100, Nairobi, Kenya
| | - Abednego Musyoki
- Department of Medical Laboratory Sciences, Kenyatta University, P.O. BOX 43844-00100, Nairobi, Kenya
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Agyepong N, Fordjour F, Owusu-Ofori A. Multidrug-resistant Acinetobacter baumannii in healthcare settings in Africa. FRONTIERS IN TROPICAL DISEASES 2023. [DOI: 10.3389/fitd.2023.1110125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
The emergence of multidrug-resistant Acinetobacter baumannii is a major concern to healthcare providers and facilities in many parts of the world. This bacterial pathogen is commonly implicated in hospital-acquired infections, particularly in critically ill patients admitted to the intensive care unit (ICU). The extensive use of antibiotics, particularly in ICUs, and the lack of proper infection control interventions in many hospitals have led to an increased emergence of multidrug-resistant A. baumannii. Infections due to multidrug-resistant A. baumannii are associated with prolonged hospital stays and high morbidity and mortality, particularly among hospitalized ICU patients. The lack of antibiotic stewardship programmes in many healthcare facilities has exacerbated the burden of A. baumannii infections in many parts of Africa. This review discusses the prevalence and antibiotic-resistance pattern of the multidrug-resistant A. baumannii, and the possible ways to address or minimise its emergence in healthcare settings in Africa.
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Awosile BB, Agbaje M, Adebowale O, Kehinde O, Omoshaba E. Beta-lactamase resistance genes in Enterobacteriaceae from Nigeria. Afr J Lab Med 2022; 11:1371. [PMID: 35282396 PMCID: PMC8905388 DOI: 10.4102/ajlm.v11i1.1371] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 08/25/2021] [Indexed: 11/23/2022] Open
Abstract
Background Beta-lactamase genes are one of the most important groups of antimicrobial resistance genes in human and animal health. Therefore, continuous surveillance of this group of resistance genes is needed for a better understanding of the local epidemiology within a country and global dissemination. Aim This review was carried out to identify different beta-lactamase resistance genes reported in published literature from Nigeria. Methods Systematic review and meta-analysis was carried out on eligible Nigerian articles retrieved from electronic literature searches of PubMed®, African Journals Online, and Google Scholar published between January 1990 and December 2019. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses method was adopted to facilitate clarity and transparency in reporting review findings. Results Fifty-seven articles were included. All beta-lactamases reported were detected from Gram-negative bacteria, particularly from Enterobacteriaceae. Thirty-six different beta-lactamase genes were reported in Nigeria. These genes belong to the narrow-spectrum, AmpC, extended-spectrum and carbapenemase beta-lactamase resistance genes. The pooled proportion estimate of extended-spectrum beta-lactamase genes in Nigeria was 31% (95% confidence interval [CI]: 26% – 36%, p < 0.0001), while the estimate of the blaCTX-M-15 gene in Nigeria was 46% (95% CI: 36% – 57%, p < 0.0001). The proportion estimate of AmpC genes was 32% (95% CI: 11% – 52%, p < 0.001), while the estimate for carbapenemases was 8% (95% CI: 5% – 12%, p < 0.001). Conclusion This study provides information on beta-lactamase distribution in Nigeria. This is necessary for a better understanding of molecular epidemiology of clinically important beta-lactamases, especially the extended-spectrum beta-lactamases and carbapenemases in Nigeria.
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Affiliation(s)
- Babafela B Awosile
- Texas Tech University School of Veterinary Medicine, Amarillo, Texas, United States
| | - Michael Agbaje
- Department of Veterinary Microbiology, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Oluwawemimo Adebowale
- Department of Veterinary Public Health and Preventive Medicine, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Olugbenga Kehinde
- Department of Veterinary Public Health and Preventive Medicine, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Ezekiel Omoshaba
- Department of Veterinary Microbiology, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
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Kurihara MNL, Sales ROD, Silva KED, Silva GD, Mansano MCT, Mahmoud FF, Simionatto S. High lethality rate of carbapenem-resistant Acinetobacter baumannii in Intensive Care Units of a Brazilian hospital: An epidemiologic surveillance study. Rev Soc Bras Med Trop 2022; 55:e05292021. [PMID: 35522809 PMCID: PMC9070061 DOI: 10.1590/0037-8682-0529-2021] [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: 09/18/2021] [Accepted: 02/16/2022] [Indexed: 05/31/2023] Open
Abstract
Background: Methods: Results: Conclusions:
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Ababneh Q, Aldaken N, Jaradat Z, Al Sbei S, Alawneh D, Al-Zoubi E, Alhomsi T, Saadoun I. Molecular epidemiology of carbapenem-resistant Acinetobacter baumannii isolated from three major hospitals in Jordan. Int J Clin Pract 2021; 75:e14998. [PMID: 34714567 DOI: 10.1111/ijcp.14998] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 10/27/2021] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND In the last decade, incidences of carbapenem-resistant Acinetobacter baumannii have been increasingly reported worldwide. Consequently, A. baumannii was included in the World Health Organization's new list of critical pathogens, for which new drugs are desperately needed. The objective of this research was to study the molecular epidemiology and antimicrobial susceptibility of clinical carbapenem-resistant A. baumannii isolated from Jordanian hospitals. METHODS A total of 78 A. baumannii and 8 Acinetobacter spp. isolates were collected from three major hospitals in Jordan during 2018. Disc diffusion and microdilution methods were used to test their susceptibility against 19 antimicrobial agents. Multilocus sequence typing (MLST) was performed using the Pasteur scheme, followed by eBURST analysis for all isolates. PCR was used to detect β-lactam resistance genes, blaOXA-23-like , blaOXA-51-like , and blaNDM-1 . RESULTS Of the 86 tested isolates, 78 (90.6%) exhibited resistance to carbapenems, whereas no resistance was recorded to tigecycline or polymyxins. Based on the resistance profiles, 10.4% and 84.8% of isolates were classified into multidrug resistant (MDR) or extensively drug resistant (XDR), respectively. The most prevalent carbapenems resistance genes amongst isolates were blaOXA-51-Like (89.5%), followed by blaOXA-23-Like (88.3%) and blaNDM-1 (10.4%). MLST revealed the presence of 19 sequence types (STs), belonging to eight different international complexes. The most commonly detected clonal complex (CC) was CC2, representing 64% of all typed isolates. CONCLUSIONS This is the first study to report the clonal diversity of A. baumannii isolates in Jordan. A high incidence of carbapenem resistance was detected in the isolates investigated. In addition, our findings provided evidence for the widespread of blaOXA-23-like harbouring carbapenem-resistant A. baumannii and belonging to CC2. The number of XDR isolates identified in this study is alarming. Thus, periodic surveillance and molecular epidemiological studies of resistance factors are important to improve treatment outcomes and prevent the spread of A. baumannii infections.
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Affiliation(s)
- Qutaiba Ababneh
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, Jordan
| | - Neda'a Aldaken
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, Jordan
| | - Ziad Jaradat
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, Jordan
| | - Sara Al Sbei
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, Jordan
| | - Dua'a Alawneh
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, Jordan
| | - Esra'a Al-Zoubi
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, Jordan
| | - Tasnim Alhomsi
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, Jordan
| | - Ismail Saadoun
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, UAE
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Metallo-Beta-Lactamase-Producing Acinetobacter spp. from Clinical Isolates at a Tertiary Care Hospital in Ghana. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3852419. [PMID: 33029505 PMCID: PMC7533015 DOI: 10.1155/2020/3852419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/24/2020] [Indexed: 11/18/2022]
Abstract
Metallo-beta-lactamase-producing Acinetobacter spp. is a major challenge for therapeutic treatment of nosocomial infections. This study is aimed at determining the prevalence of MBL-producing Acinetobacter spp. among 87 clinical isolates of Acinetobacter spp. from the Korle-Bu Teaching Hospital, Accra, between August 2014 and July 2015. Acinetobacter spp. was identified by standard bacteriological method, and resistance to different antibiotics was assessed with the Kirby–Bauer disc diffusion method. Meropenem-resistant Acinetobacter isolates were screened for enzyme activity using the modified Hodge test (MHT) and combined disc test (CDT). Additionally, multiplex PCR was used to determine MBL genes presence (blaVIM,blaIMP, and blaNDM). All Acinetobacter isolates showed high resistance to cefotaxime (90.8%), ceftazidime (75.9%), cotrimoxazole (70.1%), ciprofloxacin (64.4%), gentamicin (72.4%), levofloxacin (67.8%), and meropenem (59.8%). A total of 54 (62.1%) of Acinetobacter isolates were multidrug-resistant. Out of 52 (59.8%) meropenem-resistant Acinetobacter, 3 (5.8%) were carbapenemase producers by MHT, whilst, 23 (44.2%) were CDT positive. There was no significant difference between the resistance pattern of amikacin, ceftazidime, cotrimoxazole, ciprofloxacin, and meropenem amongst CDT-positive and CDT-negative isolates (p > 0.05). A total of 7/87 (8.1%) CDT-positive Acinetobacter isolates harboured blaNDM; of these, 4 (57.1%) were from wound swabs, urine (n = 2) (28.6%), and ear swab (n = 1) (14.3%). The study revealed that less than 9% of Acinetobacter spp. contained blaNDM encoding genes. Strict antibiotics usage plan and infection control measures are required to prevent the spread of these resistance genes.
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Olowo-okere A, Ibrahim Y, Olayinka B, Ehinmidu J, Mohammed Y, Nabti L, Rolain JM, Diene S. Phenotypic and genotypic characterization of clinical carbapenem-resistant Enterobacteriaceae isolates from Sokoto, northwest Nigeria. New Microbes New Infect 2020; 37:100727. [PMID: 32939286 PMCID: PMC7479348 DOI: 10.1016/j.nmni.2020.100727] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/15/2020] [Accepted: 06/30/2020] [Indexed: 11/30/2022] Open
Abstract
Emergence and spread of carbapenemase-producing Enterobacteriaceae (CPE) are two of the major problems currently threatening global public health. In Nigeria, interest in CPE is recent. In Sokoto, northwest Nigeria, there are no data on the prevalence and mechanism underlying carbapenem resistance. In this study, we aimed to investigate the presence of clinical carbapenems-resistant Enterobacteriaceae isolates in two leading hospitals in Sokoto, northwest Nigeria. A total of 292 non-duplicate Enterobacteriaceae isolated from clinical specimens processed in the diagnostic laboratories of two hospitals between January and June 2019 were collected. Of these, 129 (44.2 %) and 19 (6.5%) were resistant to third-generation cephalosporin and carbapenems, respectively. RT-PCR revealed that 10 (7.8%), 19 (14.7%) and 46 (35.7%) of the third-generation cephalosporin-resistant isolates harboured bla SHV, bla TEM and bla CTX-M genes, respectively. The modified Carba NP test result showed that only 7 (36.8 %) of the 19 carbapenem-resistant isolates were carbapenemase producing; among them, bla NDM-5 and bla OXA-181 genes were identified in five and two isolates, respectively. However, none of the carbapenemase genes investigated, including bla VIM, bla KPC and bla IMP, was detected in the remaining carbapenem-resistant isolates, suggesting a non-enzymatic mechanism. This study reports for the first time, the emergence of CPE in Sokoto state and the detection of NDM-producing Citrobacter freundii in Nigeria. The observed CPE in this study is a concern in a country where alternative antibiotics are rarely available.
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Affiliation(s)
- A. Olowo-okere
- Department of Pharmaceutics and Pharmaceutical Microbiology, Usmanu Danfodiyo University Sokoto, Nigeria
- Department of Pharmaceutics and Pharmaceutical Microbiology, Ahmadu Bello University, Zaria, Nigeria
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Mediterranée Infection, Marseille, France
| | - Y.K.E. Ibrahim
- Department of Pharmaceutics and Pharmaceutical Microbiology, Ahmadu Bello University, Zaria, Nigeria
| | - B.O. Olayinka
- Department of Pharmaceutics and Pharmaceutical Microbiology, Ahmadu Bello University, Zaria, Nigeria
| | - J.O. Ehinmidu
- Department of Pharmaceutics and Pharmaceutical Microbiology, Ahmadu Bello University, Zaria, Nigeria
| | - Y. Mohammed
- Department of Medical Microbiology, College of Health Sciences, Usmanu Danfodiyo University, Sokoto, Nigeria
| | - L.Z. Nabti
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Mediterranée Infection, Marseille, France
- Université de Sétif 1, Laboratoire de Microbiologie (CHU de Sétif), Sétif, Algeria
| | - J.-M. Rolain
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Mediterranée Infection, Marseille, France
- IHU-Mediterranée Infection, Marseille, France
| | - S.M. Diene
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Mediterranée Infection, Marseille, France
- IHU-Mediterranée Infection, Marseille, France
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Pormohammad A, Mehdinejadiani K, Gholizadeh P, Nasiri MJ, Mohtavinejad N, Dadashi M, Karimaei S, Safari H, Azimi T. Global prevalence of colistin resistance in clinical isolates of Acinetobacter baumannii: A systematic review and meta-analysis. Microb Pathog 2019; 139:103887. [PMID: 31765766 DOI: 10.1016/j.micpath.2019.103887] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 11/14/2019] [Accepted: 11/21/2019] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Acinetobacter baumannii antimicrobial resistance is a public health concern in developing and developed countries, especially in the hospital setting. Understanding the antibiotic resistance profile can help to provide better guidelines for the prescription of appropriate antibiotics, reduction of antibiotic resistance, and introducing new and effective treatment options. METHOD Using the PRISMA guidelines, databases of PubMed, Embase, and Cochrane Library were searched systematically from January 1, 2000, to January 1, 2018. All statistical analyses were carried out via Comprehensive Meta-Analysis Software Version 2.0 (Biostat, Englewood, NJ). Depending on the heterogeneity test, either random or fix effect models were used for determining the pooled prevalence of drug resistance. RESULT A total of 150 studies were included from 41 countries of six different WHO regional offices worldwide. The highest and the lowest rate of resistance were observed for cefotaxime (99%, 95% CI: 95-99.9) in Africa and colistin (1.1%, 95% CI: 0.3-4.5) in Western Pacific, respectively. Lebanon (17.5%, 95% CI: 16-19) and China (12%, 95% CI: 3.5-32.5) had the highest and Germany (0.2%, 95% CI: 0-2.5) had the lowest rate of resistance for colistin. CONCLUSION Our analysis showed that prevalence and rate of increased colistin resistance in South-East Asia and Eastern Mediterranean countries are higher than other regions of the world. Therefore, the establishment of appropriate antibiotic usage guidelines should be essential in these countries.
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Affiliation(s)
- Ali Pormohammad
- Student Research Committee, Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Kobra Mehdinejadiani
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Canada
| | - Pourya Gholizadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Javad Nasiri
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Naser Mohtavinejad
- Department of Radio Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Dadashi
- Department of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - Samira Karimaei
- Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Safari
- Health Promotion Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Taher Azimi
- Students Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran.
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Bashir A, Garba I, Aliero AA, Kibiya A, Abubakar MH, Ntulume I, Sarkinfada F, Ezera A. Superbugs-related prolonged admissions in three tertiary hospitals, Kano State, Nigeria. Pan Afr Med J 2019; 32:166. [PMID: 31303935 PMCID: PMC6607235 DOI: 10.11604/pamj.2019.32.166.18481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 03/24/2019] [Indexed: 11/25/2022] Open
Abstract
Introduction Superbugs are pathogenic micro-organism and especially a bacterium that has developed resistance to the medications normally used against it. As the superbug family increases, the need for appropriate diagnostic, treatment, prevention and control strategies cannot be over emphasized. Therefore, this work determined the distribution of superbug bacteria among patients on prolonged hospital admissions in three tertiary hospitals of Kano state, Nigeria. Methods A descriptive cross sectional study was undertaken among 401 patients from medical, surgery, orthopedic and burn centre wards in a three tertiary hospitals in Kano state. A sample collected comprises wound/pus, urine, urine catheter and nasal intubation and were analysed using standard microbiological methods for Acinetobacter spp and other related nosocomial bacterial pathogens. Antibiotic susceptibility testing was done using Kirby-Bauer disc diffusion method. Results One hundred and thirty eight (138) isolates were recovered, from the studied participants. More than 80% of the nosocomial infections (NIs) were caused by Gram-negative bacteria, predominantly Escherichia coli, Klebseilla spp, Proteus spp, Pseudomona spp and Acinetobacter spp. In-vitro antibiotic susceptibility test revealed that acinetobacter were 100% resistant to amoxicillin, co-trimoxazole, perfloxacin and imipenem. Conclusion Superbugs (Acinetobacter species) significantly contributed to delayed hospital admissions through observed 100% resistance to used antibiotics. The healthcare managers of these hospitals and the ministry of health need to take measures against this resistant bacteria (Acinetobacter spp) especially on prescribing antibiotics that showed 100% resistant from these studied hospitals.
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Affiliation(s)
- Alkali Bashir
- Department of Science Laboratory Technology, School of Technology Kano State Polytechnic, Kano, Nigeria.,Department of Microbiology and Immunology, Faculty of Biomedical Sciences Kampala International University Western Campus, Ishaka Bushenyi, Uganda
| | - Iliyasu Garba
- Department of Medicine, Faculty of Clinical Sciences, Bayero University, Kano State, Nigeria
| | - Adamu Almustapha Aliero
- Department of Microbiology and Immunology, Faculty of Biomedical Sciences Kampala International University Western Campus, Ishaka Bushenyi, Uganda.,Department of Microbiology, Faculty of Life Sciences, Kebbi State University of Science and Technology Aliero, Kebbi State, Nigeria
| | - Abdurrazak Kibiya
- Department of Infection Control, Aminu Kano Teaching Hospital, Kano State Nigeria
| | - Muhammad Hassan Abubakar
- Microbiology Unit, Murtala Muhammed Specialist Hospital, Hospital Management Board, Kano State, Nigeria
| | - Ibrahim Ntulume
- Department of Microbiology and Immunology, Faculty of Biomedical Sciences Kampala International University Western Campus, Ishaka Bushenyi, Uganda
| | - Faruk Sarkinfada
- Department of Medical Microbiology, College of Health Sciences, Bayero University, Kano State, Nigeria.,Department of Health and Medical Sciences Khawarizimi International College, Abu Dhabi, United Arab Emirates
| | - Agwu Ezera
- Department of Microbiology and Immunology, Faculty of Biomedical Sciences Kampala International University Western Campus, Ishaka Bushenyi, Uganda.,Medical Microbiology and Immunology Unit, Department of Biomedical Sciences, Kabale University School of Medicine, Kabale, Uganda
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Contributions of RecA and RecBCD DNA repair pathways to the oxidative stress response and sensitivity of Acinetobacter baumannii to antibiotics. Int J Antimicrob Agents 2018; 52:629-636. [DOI: 10.1016/j.ijantimicag.2018.07.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/08/2018] [Accepted: 07/29/2018] [Indexed: 01/24/2023]
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11
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Hashemzehi R, Doosti A, Kargar M, Jaafarinia M. Cloning and expression of nlpA gene as DNA vaccine candidate against Acinetobacter baumannii. Mol Biol Rep 2018; 45:395-401. [DOI: 10.1007/s11033-018-4167-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 03/16/2018] [Indexed: 01/29/2023]
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12
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Ajiboye TO, Skiebe E, Wilharm G. Contributions of ferric uptake regulator Fur to the sensitivity and oxidative response of Acinetobacter baumannii to antibiotics. Microb Pathog 2018; 119:35-41. [PMID: 29614366 DOI: 10.1016/j.micpath.2018.03.060] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 03/24/2018] [Accepted: 03/30/2018] [Indexed: 01/26/2023]
Abstract
Ferric uptake regulator (Fur) is important in the regulation of bacterial iron metabolism and uptake of Fe from the environment. We evaluated the contribution of fur to the sensitivity and oxidative response of A. baumannii to antibiotics. Deletion of fur increased the sensitivity of A. baumannii AB5075 to colistin, gentamicin, rifampicin and tigecycline. Furthermore, activities of superoxide dismutase and catalase in Δfur mutant decreased significantly compared to the parental strain. Conversely, •O2- and H2O2 accumulate in colistin, gentamicin, rifampicin or tigecycline-treated Δfur mutant compared to the parental strain. Ferrous ion (Fe2+) content of Δfur mutant increased compared to the parental strain. Fe chelator 2,2'-bipyridyl lowered the sensitivity of A. baumannii to the antibiotics. The antibiotics, except tigecycline, raised the NAD+/NADH and ADP/ATP ratio of Δfur mutant compared to the WT. Glutathione content of Δfur mutant was significantly depleted compared to parental strain following exposure to the antibiotics. We conclude that decreased capability of Δfur mutant to detoxify reactive oxygen species raised its susceptibility to antibiotics through Fenton chemistry.
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Affiliation(s)
- T O Ajiboye
- Antioxidants, Redox Biology and Toxicology Research Laboratory, Department of Medical Biochemistry, Nile University of Nigeria, FCT-Abuja, Nigeria; Project Group P2, Robert Koch Institute, Wernigerode Branch, Germany.
| | - E Skiebe
- Project Group P2, Robert Koch Institute, Wernigerode Branch, Germany
| | - G Wilharm
- Project Group P2, Robert Koch Institute, Wernigerode Branch, Germany
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Oguntomole O, Nwaeze U, Eremeeva ME. Tick-, Flea-, and Louse-Borne Diseases of Public Health and Veterinary Significance in Nigeria. Trop Med Infect Dis 2018; 3:E3. [PMID: 30274402 PMCID: PMC6136614 DOI: 10.3390/tropicalmed3010003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 12/15/2017] [Accepted: 12/20/2017] [Indexed: 12/03/2022] Open
Abstract
Mosquito-borne diseases are common high-impact diseases in tropical and subtropical areas. However, other non-mosquito vector-borne pathogens (VBPs) may share their geographic distribution, seasonality, and clinical manifestations, thereby contributing their share to the morbidity and mortality caused by febrile illnesses in these regions. The purpose of this work was to collect and review existing information and identify knowledge gaps about tick, flea-, and louse-borne diseases of veterinary and public health significance in Nigeria. Full-length articles about VBPs were reviewed and relevant information about the vectors, their hosts, geographic distribution, seasonality, and association(s) with human or veterinary diseases was extracted. Specific laboratory tools used for detection and identification of VBPs in Nigeria were also identified. A total of 62 original publications were examined. Substantial information about the prevalence and impacts of ticks and fleas on pet and service dogs (18 articles), and livestock animals (23 articles) were available; however, information about their association with and potential for causing human illnesses was largely absent despite the zoonotic nature of many of these peri-domestic veterinary diseases. Recent publications that employed molecular methods of detection demonstrated the occurrence of several classic (Ehrlichia canis, Rickettsia africae, Bartonella sp.) and emerging human pathogens (R. aeschlimannii, Neoehrlichia mikurensis) in ticks and fleas. However, information about other pathogens often found in association with ticks (R. conorii) and fleas (R. typhi, R. felis) across the African continent was lacking. Records of louse-borne epidemic typhus in Nigeria date to 1947; however, its current status is not known. This review provides an essential baseline summary of the current knowledge in Nigeria of non-mosquito VBPs, and should stimulate improvements in the surveillance of the veterinary and human diseases they cause in Nigeria. Due to increasing recognition of these diseases in other African countries, veterinary and public health professionals in Nigeria should expand the list of possible diseases considered in patients presenting with fever of unknown etiology.
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Affiliation(s)
- Oluwaseun Oguntomole
- Jiann-Ping Hsu College of Public Health, Georgia Southern University, 501 Forest Drive, Statesboro, GA 30458-8015, USA.
| | - Ugochukwu Nwaeze
- Jiann-Ping Hsu College of Public Health, Georgia Southern University, 501 Forest Drive, Statesboro, GA 30458-8015, USA.
| | - Marina E Eremeeva
- Jiann-Ping Hsu College of Public Health, Georgia Southern University, 501 Forest Drive, Statesboro, GA 30458-8015, USA.
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