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Alekish M, Ismail ZB, Albiss B, Nawasrah S. In vitro antibacterial effects of zinc oxide nanoparticles on multiple drug-resistant strains of Staphylococcus aureus and Escherichia coli: An alternative approach for antibacterial therapy of mastitis in sheep. Vet World 2018; 11:1428-1432. [PMID: 30532497 PMCID: PMC6247879 DOI: 10.14202/vetworld.2018.1428-1432] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 09/12/2018] [Indexed: 01/14/2023] Open
Abstract
AIM The aim of the study was to evaluate the antibacterial effects of zinc oxide nanoparticles (ZnO-NPs) and its possible alternative use for the treatment for mastitis in sheep and to determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of ZnO-NPs against multidrug-resistant Staphylococcus aureus and Escherichia coli strains isolated from subclinical mastitis cases in sheep. MATERIALS AND METHODS A total of 50 pooled milk samples were collected from ewes with subclinical mastitis. Milk samples were cultured using standard laboratory techniques, and multidrug-resistant bacterial strains were determined using the Kirby-Bauer disk diffusion method. The MIC and MBC of ZnO-NPs were determined against isolated multidrug-resistant S. aureus and E. coli strains using microwell dilution method. RESULTS A total of 43 different bacterial isolates were recovered from milk samples of ewes affected with subclinical mastitis. Isolated strains of S. aureus and E. coli were found resistant to three or more common antibacterial agents and were used to determine the MIC and MBC of ZnO-NPs. The MIC and MBC values of ZnO-NPs were significantly lower for S. aureus than that for E. coli. The MIC and MBC of ZnO-NPs against S. aureus were 3.9 µg/ml and 7.81 µg/ml, respectively, while for E. coli, the MIC and MBC of ZnO-NPs were 31.25 µg/ml and 62.5 µg/ml, respectively. CONCLUSION Results of this study indicate the potential antibacterial effects of ZnO-NPs against multidrug-resistant S. aureus and E. coli isolated from ovine subclinical mastitis at concentrations of 3.9 µg/ml and 31.25 µg/ml, respectively.
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Affiliation(s)
- Myassar Alekish
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Zuhair Bani Ismail
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Borhan Albiss
- Department of Applied Physical Sciences, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Sara Nawasrah
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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Kwiatkowski P, Pruss A, Grygorcewicz B, Wojciuk B, Dołęgowska B, Giedrys-Kalemba S, Kochan E, Sienkiewicz M. Preliminary Study on the Antibacterial Activity of Essential Oils Alone and in Combination with Gentamicin Against Extended-Spectrum β-Lactamase-Producing and New Delhi Metallo-β-Lactamase-1-Producing Klebsiella pneumoniae Isolates. Microb Drug Resist 2018; 24:1368-1375. [PMID: 29708847 DOI: 10.1089/mdr.2018.0051] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
AIM The aim of the study was to investigate possible synergistic effects between several selected, commercially available essential oils and gentamicin against extended-spectrum β-lactamase (ESBL)-producing and New Delhi metallo-β-lactamase-1 (NDM-1)-producing Klebsiella pneumoniae isolates. MATERIALS AND METHODS ESBLs production was confirmed by double-disk synergy test. Isolates positive for blaNDM-1 gene were found among the tested strains. K. pneumoniae ATCC® BAA-1705™ strain was used as a control. The checkerboard method was applied to assess the synergistic and additive action of nine essential oils: caraway, fennel, peppermint, geranium, basil, clove, thyme, clary sage, and lavender, respectively, in combination with gentamicin. RESULTS Our results indicated that peppermint oil combined with gentamicin showed synergistic activity against both control, ESBL-producing and NDM-1-producing isolates. Caraway essential oil demonstrated synergy with gentamicin toward ESBL-producing and additionally gentamicin-resistant strains. The additive effect was observed for gentamicin combined with thyme, fennel, basil, and clary sage. CONCLUSIONS Because of their synergistic activity with gentamicin, peppermint, and caraway oils in particular, can be considered as an alternative or an addition for the control of infections with limited therapeutic options due to multidrug resistance.
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Affiliation(s)
- Paweł Kwiatkowski
- 1 Department of Microbiology, Immunology, and Laboratory Medicine, Pomeranian Medical University in Szczecin , Szczecin, Poland
| | - Agata Pruss
- 1 Department of Microbiology, Immunology, and Laboratory Medicine, Pomeranian Medical University in Szczecin , Szczecin, Poland
| | - Bartłomiej Grygorcewicz
- 2 Department of Immunology, Microbiology and Physiological Chemistry, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology , Szczecin, Poland
| | - Bartosz Wojciuk
- 1 Department of Microbiology, Immunology, and Laboratory Medicine, Pomeranian Medical University in Szczecin , Szczecin, Poland
| | - Barbara Dołęgowska
- 1 Department of Microbiology, Immunology, and Laboratory Medicine, Pomeranian Medical University in Szczecin , Szczecin, Poland
| | - Stefania Giedrys-Kalemba
- 1 Department of Microbiology, Immunology, and Laboratory Medicine, Pomeranian Medical University in Szczecin , Szczecin, Poland
| | - Ewa Kochan
- 3 Pharmaceutical Biotechnology Department, Medical University of Lodz , Lodz, Poland
| | - Monika Sienkiewicz
- 4 Department of Allergology and Respiratory Rehabilitation, 2nd Chair of Otolaryngology, Medical University of Lodz , Lodz, Poland
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Belbase A, Pant ND, Nepal K, Neupane B, Baidhya R, Baidya R, Lekhak B. Antibiotic resistance and biofilm production among the strains of Staphylococcus aureus isolated from pus/wound swab samples in a tertiary care hospital in Nepal. Ann Clin Microbiol Antimicrob 2017; 16:15. [PMID: 28330484 PMCID: PMC5363015 DOI: 10.1186/s12941-017-0194-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/18/2017] [Indexed: 11/29/2022] Open
Abstract
Background The increasing drug resistance along with inducible clindamycin resistance, methicillin resistance and biofilm production among the strains of Staphylococcus aureus are present as the serious problems to the successful treatment of the infections caused by S. aureus. So, the main objectives of this study were to determine the antimicrobial susceptibility patterns along with the rates of inducible clindamycin resistance, methicillin resistance and biofilm production among the strains of S. aureus isolated from pus/wound swab samples. Methods A total of 830 non-repeated pus/wound swab samples were processed using standard microbiological techniques. The colonies grown were identified on the basis of colony morphology, Gram’s stain and biochemical tests. Antimicrobial susceptibility testing was performed by Kirby–Bauer disc diffusion technique. Detection of inducible clindamycin resistance was performed by D test, while detection of methicillin resistant S. aureus (MRSA) was performed by determination of minimum inhibitory concentration of oxacillin by agar dilution method. Similarly, detection of biofilm formation was performed by microtiter plate method. Strains showing resistance to three or more than three different classes of antibiotics were considered multidrug resistant. Results Total 76 samples showed the growth of S. aureus, among which 36 (47.4%) contained MRSA and 17 (22.4%) samples were found to have S. aureus showing inducible clindamycin resistance. Among the S. aureus isolated from outpatients, 41.9% were MRSA. Highest rates of susceptibility of S. aureus were seen toward linezolid (100%) and vancomycin (100%). Similarly, S. aureus isolated from 35 (46.1%) samples were found to be biofilm producers. Higher rate of inducible clindamycin resistance was seen among MRSA in comparison to methicillin susceptible S. aureus (MSSA). Similarly, higher rates of multidrug resistance and methicillin resistance were found among biofilm producing strains in comparison to biofilm non producing strains. Conclusions The rate of isolation of MRSA from community acquired infections was found to be high in Nepal. Increased rate of inducible clindamycin resistance as compared to previous studies in Nepal was noted. So for the proper management of the infections caused by S. aureus, D test for the detection of inducible clindamycin resistance should be included in the routine laboratory diagnosis. Further, detection of biofilm production should also be included in the routine tests. Linezolid and vancomycin can be used for the preliminary treatment of the serious infections caused by S. aureus.
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Affiliation(s)
- Ankit Belbase
- Department of Microbiology, GoldenGate International College, Battisputali, Kathmandu, Nepal
| | - Narayan Dutt Pant
- Department of Microbiology, Grande International Hospital, Dhapasi, Kathmandu, Nepal.
| | - Krishus Nepal
- Department of Microbiology, GoldenGate International College, Battisputali, Kathmandu, Nepal
| | - Bibhusan Neupane
- Department of Microbiology, GoldenGate International College, Battisputali, Kathmandu, Nepal
| | - Rikesh Baidhya
- Department of Microbiology, GoldenGate International College, Battisputali, Kathmandu, Nepal
| | - Reena Baidya
- Department of Pathology, B&B Hospital, Gwarko, Lalitpur, Nepal
| | - Binod Lekhak
- Central Department of Microbiology, Tribhuvan University, Kirtipur, Nepal
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Nunes JHB, Bergamini FR, Lustri WR, de Paiva PP, Ruiz ALT, de Carvalho JE, Corbi PP. Synthesis, characterization and in vitro biological assays of a silver(I) complex with 5-fluorouracil: A strategy to overcome multidrug resistant tumor cells. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.01.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Kshetry AO, Pant ND, Bhandari R, Khatri S, Shrestha KL, Upadhaya SK, Poudel A, Lekhak B, Raghubanshi BR. Minimum inhibitory concentration of vancomycin to methicillin resistant Staphylococcus aureus isolated from different clinical samples at a tertiary care hospital in Nepal. Antimicrob Resist Infect Control 2016; 5:27. [PMID: 27446531 PMCID: PMC4955258 DOI: 10.1186/s13756-016-0126-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 07/05/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Methicillin resistant Staphylococcus aureus (MRSA) has evolved as a serious threat to public health. It has capability to cause infections not only in health care settings but also in community. Due to the multidrug resistance shown by MRSA, there are limited treatment options for the infections caused by this superbug. Vancomycin is used as the drug of choice for the treatment of infections caused by MRSA. Different studies from all around the world have documented the emergence of strains of S. aureus those are intermediate sensitive or resistant to vancomycin. And recently, there have been reports of reduced susceptibility of MRSA to vancomycin, from Nepal also. So the main purpose of this study was to determine the minimum inhibitory concentration (MIC) of vancomycin to methicillin resistant S. aureus isolated from different clinical specimens. METHODS Total 125 strains of S. aureus isolated from different clinical samples at KIST Medical College and Teaching Hospital, Lalitpur, Nepal from Nov 2012 to June 2013, were subjected to MRSA detection by cefoxitin disc diffusion method. The minimum inhibitory concentrations of vancomycin to confirmed MRSA strains were determined by agar dilution method. Yellow colored colonies in mannitol salt agar, which were gram positive cocci, catalase positive and coagulase positive were confirmed to be S. aureus. RESULTS Among, total 125 S. aureus strains isolated; 47(37.6%) were MRSA. Minimum inhibitory concentrations of vancomycin to the strains of MRSA ranged from 0.125 μg/ml to 1 μg/ml. CONCLUSION From our findings we concluded that the rate of isolation of MRSA among all the strains of S. aureus isolated from clinical samples was very high. However, none of the MRSA strains were found to be vancomycin intermediate-sensitive or vancomycin-resistant.
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Affiliation(s)
- Arjun Ojha Kshetry
- Department of Microbiology, Goldengate International College, Battisputali, Kathmandu, Nepal
| | - Narayan Dutt Pant
- Department of Microbiology, Grande International Hospital, Dhapasi, Kathmandu, Nepal
| | - Raju Bhandari
- Department of Microbiology, Goldengate International College, Battisputali, Kathmandu, Nepal
| | - Sabita Khatri
- Department of Microbiology, Goldengate International College, Battisputali, Kathmandu, Nepal
| | - Krishma Laxmi Shrestha
- Department of Microbiology, Goldengate International College, Battisputali, Kathmandu, Nepal
| | - Shambhu Kumar Upadhaya
- Department of Microbiology, Goldengate International College, Battisputali, Kathmandu, Nepal
| | - Asia Poudel
- Department of Microbiology, Goldengate International College, Battisputali, Kathmandu, Nepal
| | - Binod Lekhak
- Department of Microbiology, Goldengate International College, Battisputali, Kathmandu, Nepal
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Kulakovskaya E, Baskunov B, Zvonarev A. The antibiotic and membrane-damaging activities of cellobiose lipids and sophorose lipids. J Oleo Sci 2015; 63:701-7. [PMID: 24976613 DOI: 10.5650/jos.ess14037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Antibiotic activity was compared for Cryptococcus humicola cellobiose lipids, the mixture of 2,3,4-О-triacetyl-β-D-glucopyranosyl-(1→4)-(6-О-acetyl-β-D-glucopyranosyl-(1→16)-2,16-dihydroxyhexodecanoic acid and 2,3,4-О-triacetyl-β-D-glucopyranosyl-(1→4)-(6-О-acetyl-β-D-glucopyranosyl-(1→16)-2,17,18-trihydroxyoctotodecanoic acid, and the commercial sophorose lipid mixture of a mono-acetylated acidic sophorose lipid and a di-acetylated acidic sophorose lipid, both containing the C18:1 fatty acid residue. The MIC values of cellobiose lipids were 0.005 and 0.04 mg/mL for Filobasidiella neoformans and Candida tropicalis, respectively. The MIC values of sophorose lipids were 1 and 15 mg/mL for F. neoformans and C. tropicalis, respectively. MIC values for some bacteria were in the range of 10-30 mg/mL for both glycolipid preparations. Both sophorose lipids and cellobiose lipids displayed a membrane-damaging activity against F. neoformans. The treatment with these glycolipids reduces the content of ATP in the cells of test cultures and results in their staining with ethidium bromide.
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Affiliation(s)
- Ekaterina Kulakovskaya
- Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences
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Abstract
A review of the published literature over the period 1978-1993 was undertaken to assess any changes in the prevalence of beta-lactamase-producing bacterial pathogens and also any changes in the susceptibility in these pathogens to amoxycillin/clavulanate. The review has involved the examination of over 1500 publications. The review shows that in general there has been an increase in the frequency of beta-lactamase-producing pathogens resistant to ampicillin and amoxycillin but there is no evidence for any significant increase in resistance to amoxycillin/clavulanate over the period of the review.
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