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Bakchi B, Maddipatla S, Gupta K, Singampalli A, Saxena D, Maitra R, Agnivesh PK, Kalia NP, Nanduri S, Chopra S, Yaddanapudi VM. Facile one-pot synthesis of N-pyridinylaminonaphthol derivatives and their antibacterial evaluation against multidrug-resistant Staphylococcus aureus. Arch Pharm (Weinheim) 2024:e2400358. [PMID: 39102220 DOI: 10.1002/ardp.202400358] [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: 05/09/2024] [Revised: 07/16/2024] [Accepted: 07/20/2024] [Indexed: 08/06/2024]
Abstract
The escalating severity of the menace posed by bacterial resistance has rendered the existing antibiotics less effective, thus necessitating the discovery of new antibacterial agents. The current study reports the exploration of substituted N-pyridinylaminonaphthols produced by a straightforward, one-pot multicomponent reaction process as antibacterial agents. The synthesized derivatives were assessed in vitro for their antibacterial properties against a panel of bacterial pathogens. The analogs 4b, 4g, 4h, 4i, 4j, 4l, 4r, and 4t exhibited potent inhibitory activity with minimum inhibitory concentration (MIC) values of 1-2 µg/mL. Notably, 4b, 4l, and 4t displayed an excellent selectivity index. Additionally, they were active against the multidrug-resistant bacterial strains, with 4l exhibiting the best activity against methicillin-resistant Staphylococcus aureus and vancomycin resistant staphylococcus aureus with a MIC of 1 µg/mL. 4l showed synergism with gentamycin and showed bactericidal property in a concentration-dependent manner. Furthermore, the molecule 4l inhibited the DNA gyrase supercoiling activity. Absorption, distribution, metabolism, excretion/toxicity parameters and pharmacokinetic properties were assessed via in silico techniques, which elucidate the potential mode of action. These findings demonstrate the potential of the N-pyridinylaminonaphthol derivatives as antibacterial agents against multidrug-resistant S. aureus.
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Affiliation(s)
- Bulti Bakchi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Sarvan Maddipatla
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Khushi Gupta
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Anuradha Singampalli
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Deepanshi Saxena
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Rahul Maitra
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Puja K Agnivesh
- Department of Biological Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Nitin P Kalia
- Department of Biological Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Srinivas Nanduri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Siddharth Chopra
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Venkata M Yaddanapudi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
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Bitew A, Gelaw A, Wondimeneh Y, Ayenew Z, Getie M, Tafere W, Gebre-Eyesus T, Yimer M, Beyene GT, Bitew M, Abayneh T, Abebe M, Mihret A, Yeshitela B, Teferi M, Gelaw B. Prevalence and antimicrobial susceptibility pattern of Vibrio cholerae isolates from cholera outbreak sites in Ethiopia. BMC Public Health 2024; 24:2071. [PMID: 39085873 PMCID: PMC11292863 DOI: 10.1186/s12889-024-19621-4] [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: 01/23/2024] [Accepted: 07/29/2024] [Indexed: 08/02/2024] Open
Abstract
BACKGROUND Cholera is an acute infectious disease caused by ingestion of contaminated food or water with Vibrio cholerae. Cholera remains a global threat to public health and an indicator of inequity and lack of social development. The aim of this study was to assess the prevalence and antimicrobial susceptibility pattern of V. cholerae from cholera outbreak sites in Ethiopia. METHODS Across-sectional study was conducted from May 2022 to October 2023 across different regions in Ethiopia: Oromia National Regional State, Amhara National Regional State and Addis Ababa City Administration. A total of 415 fecal samples were collected from the three regions. Two milliliter fecal samples were collected from each study participants. The collected samples were cultured on Blood Agar, MacConkey Agar and Thiosulfate Citrate Bile Salt Sucrose Agar. A series of biochemical tests Oxidase test, String test, Motility, Indole, Citrate, Gas production, H2S production, Urease test were used to identify V. cholerae species. Both polyvalent and monovalent antisera were used for agglutination tests to identify and differentiate V. cholerae serogroup and serotypes. In addition, Kirby-Bauer Disk diffusion antibiotic susceptibility test method was done. Data were registered in epi-enfo version 7 and analyzed by Statistical Package for Social Science version 25. Descriptive statistics were used to determine the prevalence of Vibrio cholerae. Logistic regression model was fitted and p-value < 0.05 was considered as statically significant. RESULTS The prevalence of V. cholerae in the fecal samples was 30.1%. Majority of the isolates were from Oromia National Regional State 43.2% (n = 54) followed by Amhara National Regional State 31.2% (n = 39) and Addis Ababa City Administration 25.6% (n = 32). Most of the V. cholerae isolates were O1 serogroups 90.4% (n = 113) and Ogawa serotypes 86.4% (n = 108). Majority of the isolates were susceptible to ciprofloxacin 100% (n = 125), tetracycline 72% (n = 90) and gentamycin 68% (n = 85). More than half of the isolates were resistant to trimethoprim-sulfamethoxazole 62.4% (n = 78) and ampicillin 56.8% (n = 71). In this study, participants unable to read and write were about four times more at risk for V. cholerae infection (AOR: 3.8, 95% CI: 1.07-13.33). In addition, consumption of river water were about three times more at risk for V. cholerae infection (AOR: 2.8, 95% CI: 1.08-7.08). CONCLUSION our study revealed a high prevalence of V. cholerae from fecal samples. The predominant serogroups and serotypes were O1 and Ogawa, respectively. Fortunately, the isolates showed susceptible to most tested antibiotics. Drinking water from river were the identified associated risk factor for V. cholerae infection. Protecting the community from drinking of river water and provision of safe and treated water could reduce cholera outbreaks in the study areas.
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Affiliation(s)
- Abebaw Bitew
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia.
- Department of Medical Microbiology, College of Medicine and Health Sciences, Debre Markos University, Debre Markos, Ethiopia.
| | - Aschalew Gelaw
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Yitayih Wondimeneh
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Zeleke Ayenew
- Department of Bacteriology, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Michael Getie
- Department of Medical Microbiology, Amhara National Regional State Public Health Institute, Bahir Dar, Ethiopia
| | - Wudu Tafere
- Department of Medical Microbiology, Amhara National Regional State Public Health Institute, Bahir Dar, Ethiopia
| | - Tsehaynesh Gebre-Eyesus
- Department of Medical Microbiology, Amhara National Regional State Public Health Institute, Bahir Dar, Ethiopia
| | - Marechign Yimer
- Bacterial and Viral Disease Research Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Getachew Tesfaye Beyene
- Bacterial and Viral Disease Research Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Molalegne Bitew
- Bio and Emerging Technology Institute of Ethiopia, Addis Ababa, Ethiopia
| | | | - Markos Abebe
- Bacterial and Viral Disease Research Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Adane Mihret
- Bacterial and Viral Disease Research Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Biruk Yeshitela
- Bacterial and Viral Disease Research Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Mekonnen Teferi
- Bacterial and Viral Disease Research Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Baye Gelaw
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
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Ye L, Zheng Z, Wang Y, Hu Q, Zhong L, Heng H, Guo Z, Li R, Chan EWC, Chen S. Integrating metagenomic and isolation strategies revealed high contamination of pathogenies and resistome in market shrimps. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171924. [PMID: 38522537 DOI: 10.1016/j.scitotenv.2024.171924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 03/21/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
This study employs a comprehensive approach combining metagenomic analysis and bacterial isolation to elucidate the microbial composition, antibiotic resistance genes (ARGs), and virulence factors (VFGs) present in shrimps from market and supermarket. Metagenomic analysis of shrimps revealed a dominance of Proteobacteria and Bacteroidetes with Firmicutes notably enriched in some samples. On the other hand, the dominant bacteria isolated included Citrobacter portucalensis, Escherichia coli, Salmonella enterica, Vibrio species and Klebsiella pneumonaie. Metagenomic analysis unveiled a diverse spectrum of 23 main types and 380 subtypes of ARGs in shrimp samples including many clinical significant ARGs such as blaKPC, blaNDM, mcr, tet(X4) etc. Genomic analysis of isolated bacterial strains identified 14 ARG types with 109 subtype genes, which complemented the metagenomic data. Genomic analysis also allowed us to identify a rich amount of MDR plasmids, which provided further insights into the dissemination of resistance genes in different species of bacteria in the same samples. Examination of VFGs and mobile genetic elements (MGEs) in both metagenomic and bacterial genomes revealed a complex landscape of factors contributing to bacterial virulence and genetic mobility. Potential co-occurrence patterns of ARGs and VFGs within human pathogenic bacteria underlined the intricate interplay between antibiotic resistance and virulence. In conclusion, this integrated analysis for the first time provides a comprehensive view and sheds new light on the potential hazards associated with shrimp products in the markets. The findings underscore the necessity of ongoing surveillance and intervention strategies to mitigate risks posed by antibiotic-resistant bacteria in the food supply chain using the novel comprehensive approaches.
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Affiliation(s)
- Lianwei Ye
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Zhiwei Zheng
- State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Shenzhen Key Lab for Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
| | - Yaling Wang
- Shenzhen Key Lab for Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
| | - Qiao Hu
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Liang Zhong
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Heng Heng
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Zhihao Guo
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Runsheng Li
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Edward Wai Chi Chan
- State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Sheng Chen
- State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Shenzhen Key Lab for Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China.
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4
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Liang W, Zhang Q, Qian Q, Wang M, Ding Y, Zhou J, Zhu Y, Jin Y, Chen X, Kong H, Song W, Lu X, Wu X, Xu X, Dai S, Sun W. Diagnostic strategy of metagenomic next-generation sequencing for gram negative bacteria in respiratory infections. Ann Clin Microbiol Antimicrob 2024; 23:10. [PMID: 38302964 PMCID: PMC10835912 DOI: 10.1186/s12941-024-00670-x] [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: 11/04/2023] [Accepted: 01/20/2024] [Indexed: 02/03/2024] Open
Abstract
OBJECTIVE This study aims to identify the most effective diagnostic method for distinguishing pathogenic and non-pathogenic Gram-negative bacteria (GNB) in suspected pneumonia cases using metagenomic next-generation sequencing (mNGS) on bronchoalveolar lavage fluid (BALF) samples. METHODS The effectiveness of mNGS was assessed on BALF samples collected from 583 patients, and the results were compared with those from microbiological culture and final clinical diagnosis. Three interpretational approaches were evaluated for diagnostic accuracy. RESULTS mNGS outperformed culture significantly. Among the interpretational approaches, Clinical Interpretation (CI) demonstrated the best diagnostic performance with a sensitivity of 87.3%, specificity of 100%, positive predictive value of 100%, and negative predictive value of 98.3%. CI's specificity was significantly higher than Simple Interpretation (SI) at 37.9%. Additionally, CI excluded some microorganisms identified as putative pathogens by SI, including Haemophilus parainfluenzae, Haemophilus parahaemolyticus, and Klebsiella aerogenes. CONCLUSION Proper interpretation of mNGS data is crucial for accurately diagnosing respiratory infections caused by GNB. CI is recommended for this purpose.
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Affiliation(s)
- Wenyan Liang
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Qun Zhang
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Qian Qian
- Jiangsu Health Vocational College, Nanjing, 211800, China
| | - Mingyue Wang
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Yuchen Ding
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Ji Zhou
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Yi Zhu
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Yu Jin
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Xuesong Chen
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Hui Kong
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Wei Song
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Xin Lu
- Department of Respiratory and Critical Care Medicine, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaodong Wu
- Department of Respiratory and Critical Care Medicine, Shanghai East Hospital, Tongji University, Shanghai, China
| | - Xiaoyong Xu
- Department of respiratory and critical care medicine, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210000, China
| | - Shanling Dai
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Wenkui Sun
- Department of Respirology and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
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Saraswat J, Firoz A, Kamli MR, Patel R. Improved Antibacterial Activity of Peptide Nisin with Pyrrole-Based Ionic Liquids Having Bis(trifluoromethylsulfonyl)imide as a Counterion: A Synergistic Approach to Combat Bacterial Infections. ACS OMEGA 2024; 9:2758-2769. [PMID: 38250392 PMCID: PMC10795159 DOI: 10.1021/acsomega.3c07824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/02/2023] [Accepted: 12/12/2023] [Indexed: 01/23/2024]
Abstract
Bacterial resistance against antimicrobial drugs is a forthcoming threat to the prevention and treatment of developing bacterial infections. Hence, the development of new antimicrobial therapy or therapeutic drugs is desperately needed. A combination of antibiotics exhibits synergistic antibacterial effects. As the combination approach of antibiotics has always shown better results against pathogens compared to monotherapy with an antibiotic, we focused on creating a new combination that may reduce the chances of strains attaining resistance, consequently lowering the toxicity factor associated with the consumption of high amounts of antibiotics. Nisin, a food preservative and potential antibiotic, shows antibacterial activity against Gram-positive strains. Since the past decade, ionic liquids (ILs) have proven to be an important class of potential antibacterial agents. In our study, we studied the effect of pyrrolidinium-based ILs and arrived at a noncovalent conjugate formed by combining nisin with ILs. The conjugates were tested against a couple of clinically relevant microorganisms, namely, Escherichia coli and Staphylococcus aureus. We reached a novel discovery that the combination of sodium/iodide symporter (NIS) and IL exhibited inhibitory effects against Gram-negative bacteria, which was not observed with NIS alone. The results showed remarkable improvement in the minimum inhibitory concentration (MIC) value of NIS in the presence of ILs targeted against both microorganisms. Further, flow cytometry and confocal microscopy results revealed the membrane disruption efficiency of the best combination obtained, leading to cell death. Additionally, the complexation of nisin and ILs was studied using various techniques, such as surface tension, dynamic light scattering, absorption spectroscopy, and molecular docking.
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Affiliation(s)
- Juhi Saraswat
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Ahmad Firoz
- Department
of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Princess
Dr. Najla Bint Saud Al-Saud Centre for Excellence Research in Biotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Majid Rasool Kamli
- Department
of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Rajan Patel
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
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Humphries R. Biographical Feature: Janet Hindler, MCLS, MT (ASCP), F(AAM). J Clin Microbiol 2023; 61:e0051122. [PMID: 37982610 PMCID: PMC10729750 DOI: 10.1128/jcm.00511-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023] Open
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7
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Ye L, Zheng Z, Xu Y, Yang C, Heng H, Li F, Chan EWC, Chen S. Prevalence and genetic basis of tetracycline resistance in Vibrioparahaemolyticus isolates recovered from food products in Shenzhen, China during 2013 to 2021. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 902:166026. [PMID: 37541513 DOI: 10.1016/j.scitotenv.2023.166026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 07/30/2023] [Accepted: 08/01/2023] [Indexed: 08/06/2023]
Abstract
Understanding tetracycline resistance in Vibrio parahaemolyticus from food products is crucial for effective control measures against this foodborne pathogen. This study aimed to investigate the prevalence, evolution routes, and mechanism of transmission of tetracycline resistance in Vibrio parahaemolyticus isolates collected from food products in Shenzhen, China. A total of 2342 non-duplicate Vibrio parahaemolyticus were isolated from 3509 food samples during the period 2013-2021. Among these 2342 Vibrio parahaemolyticus strains, 530 (21.37 %) were resistant to tetracycline. These tetracycline-resistant Vibrio parahaemolyticus strains were mainly isolated from shrimp samples, with the highest resistance rate (46.9 %) observed in 2019. Phylogenetic and genomic analyses of 387 isolates carrying the tet genes revealed that five different types of tet genes (tet(34), tet(A), tet(B), tet(M), and tet(E)) were present. The tet(A) gene was the most common (65 % of isolates), while tet(E) and tet(M) genes were only detected in specific years. Although tet(A) is the most commonly detected gene, it only encodes resistance in a low percentage of strains (47/129). On the other hand, the resistance rate is highest in isolates carrying tet(B) (41/55). Interestingly, V. parahaemolyticus carrying the tet genes were not necessarily tetracycline-resistant, and vice versa. A total of six different types of plasmids and two transposable units were found to carry the tet genes. V. parahaemolyticus strains that harbored these plasmids were often resistant to multiple antibiotics, indicating that horizontal transfer of antibiotic resistance genes is common among V. parahaemolyticus strains. Our findings suggest a high prevalence of tetracycline resistance in Vibrio parahaemolyticus strains recovered from food products in Shenzhen, China. These results provide valuable insight into the evolution and transmission of tetracycline resistance in foodborne Vibrio parahaemolyticus isolates and highlight the need for effective control measures to prevent the spread of antibiotic resistance.
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Affiliation(s)
- Lianwei Ye
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Zhiwei Zheng
- State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Shenzhen Key Lab for Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
| | - Yating Xu
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Chen Yang
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Heng Heng
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Fuyong Li
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Edward Wai Chi Chan
- State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Sheng Chen
- State Key Lab of Chemical Biology and Drug Discovery and the Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Shenzhen Key Lab for Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China; Animal Health Research Center, City University of Hong Kong Chengdu Research Institute, Chengdu, China.
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8
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Sahoo SK, Ommi O, Maddipatla S, Singh P, Ahmad MN, Kaul G, Nanduri S, Dasgupta A, Chopra S, Yaddanapudi VM. Isoxazole carboxylic acid methyl ester-based urea and thiourea derivatives as promising antitubercular agents. Mol Divers 2023; 27:2037-2052. [PMID: 36282413 PMCID: PMC9592870 DOI: 10.1007/s11030-022-10543-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 09/28/2022] [Indexed: 11/01/2022]
Abstract
In our continued efforts to find potential chemotherapeutics active against drug-resistant (DR) Mycobacterium tuberculosis (Mtb), causative agent of Tuberculosis (TB) and to curb the current burdensome treatment regimen, herein we describe the synthesis and biological evaluation of urea and thiourea variants of 5-phenyl-3-isoxazolecarboxylic acid methyl esters as promising anti-TB agent. Majority of the tested compounds displayed potent in vitro activity not only against drug-susceptible (DS) Mtb H37Rv but also against drug-resistant (DR) Mtb. Cell viability test against Vero cells deemed these compounds devoid of significant toxicity. 3,4-Dichlorophenyl derivative (MIC 0.25 µg/mL) and 4-chlorophenyl congener (MIC 1 µg/mL) among urea and thiourea libraries respectively exhibited optimum potency. Lead optimization resulted in the identification of 1,4-linked analogue of 3,4-dichlorophenyl urea derivative demonstrating improved selectivity. Further, in silico study complemented with previously proposed prodrug like attributes of isoxazole esters. Taken together, this molecular hybridization approach presents a new chemotype having potential to be translated into an alternate anti-Mtb agent.
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Affiliation(s)
- Santosh Kumar Sahoo
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Ojaswitha Ommi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Sarvan Maddipatla
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Priti Singh
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Mohammad Naiyaz Ahmad
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Jankipuram Extension, Lucknow, Uttar Pradesh, 226031, India
- AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Jankipuram Extension, Lucknow, Uttar Pradesh, 226031, India
- AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Srinivas Nanduri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Arunava Dasgupta
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Jankipuram Extension, Lucknow, Uttar Pradesh, 226031, India.
- AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Jankipuram Extension, Lucknow, Uttar Pradesh, 226031, India.
- AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Venkata Madhavi Yaddanapudi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India.
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Chen X, Shan T, Ren B, Zhang L, Xu HHK, Wang N, Zhou X, Li H, Cheng L. Dimethylaminododecyl Methacrylate-Incorporated Dental Materials Could Be the First Line of Defense against Helicobacter pylori. Int J Mol Sci 2023; 24:13644. [PMID: 37686449 PMCID: PMC10487857 DOI: 10.3390/ijms241713644] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/10/2023] Open
Abstract
Oral cavity is an essential reservoir for H. pylori. We aimed to investigate the antibacterial effects of dimethylaminododecyl methacrylate (DMADDM) against H. pylori. Modified giomers were prepared by introducing 0%, 1.25% and 2.5% DMADDM monomers. Broth microdilution assay, spot assay, Alamer Blue assay, PMA-qPCR, crystal violet staining, scanning electron microscopy observation and live/dead bacterial staining were performed to evaluate the antibacterial and antibiofilm effects of DMADDM and modified giomers in vitro. Urease assay, qPCR, hematoxylin-eosin staining and ELISA were performed to evaluate the inflammation levels and colonization of H. pylori in vivo. In vitro experiments indicated that the minimum inhibitory concentration and minimum bactericidal concentration of DMADDM were 6.25 μg/mL and 25 μg/mL, respectively. It inhibited H. pylori in a dose- and time-dependent manner, and significantly reduced the expression of cagA, vacA, flaA and ureB. DMADDM-modified giomers inhibited the formation of H. pylori biofilm and reduced live cells within it. In vivo experiments confirmed that the pretreatment with DMADDM-modified dental resin effectively reduced the gastric colonization of oral-derived H. pylori, suppressed systemic and local gastric inflammation. DMADDM monomers and DMADDM-modified giomers possessed excellent antibacterial and antibiofilm effects on H. pylori. Pretreatment with DMADDM-modified giomers significantly inhibited the gastric infection by H. pylori.
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Affiliation(s)
- Xi Chen
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Tiantian Shan
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Biao Ren
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Lin Zhang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Hockin H. K. Xu
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD 21021, USA
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Nanxi Wang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Hong Li
- West China Marshall Research Center for Infectious Diseases, Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu 610041, China
- Division of Infectious Diseases, State Key Laboratory of Biotherapy and Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Lei Cheng
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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10
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Rothberg MB, Haessler S, Deshpande A, Yu PC, Lindenauer PK, Zilberberg MD, Higgins TL, Imrey PB. Derivation and validation of a risk assessment model for drug-resistant pathogens in hospitalized patients with community-acquired pneumonia. Infect Control Hosp Epidemiol 2023; 44:1143-1150. [PMID: 36172877 PMCID: PMC10050215 DOI: 10.1017/ice.2022.229] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To derive and validate a model for risk of resistance to first-line community-acquired pneumonia (CAP) therapy. DESIGN We developed a logistic regression prediction model from a large multihospital discharge database and validated it versus the Drug Resistance in Pneumonia (DRIP) score in a holdout sample and another hospital system outside that database. Resistance to first-line CAP therapy (quinolone or third generation cephalosporin plus macrolide) was based on blood or respiratory cultures. SETTING This study was conducted using data from 177 Premier Healthcare database hospitals and 11 Cleveland Clinic hospitals. PARTICIPANTS Adults hospitalized for CAP. EXPOSURE Risk factors for resistant infection. RESULTS Among 138,762 eligible patients in the Premier database, 12,181 (8.8%) had positive cultures and 5,200 (3.8%) had organisms resistant to CAP therapy. Infection with a resistant organism in the previous year was the strongest predictor of resistance; markers of acute illness (eg, receipt of mechanical ventilation or vasopressors) and chronic illness (eg, pressure ulcer, paralysis) were also associated with resistant infections. Our model outperformed the DRIP score with a C-statistic of 0.71 versus 0.63 for the DRIP score (P < .001) in the Premier holdout sample, and 0.65 versus 0.58 (P < .001) in Cleveland Clinic hospitals. Clinicians at Premier facilities used broad-spectrum antibiotics for 20%-30% of patients. In discriminating between patients with and without resistant infections, physician judgment slightly outperformed the DRIP instrument but not our model. CONCLUSIONS Our model predicting infection with a resistant pathogen outperformed both the DRIP score and physician practice in an external validation set. Its integration into practice could reduce unnecessary use of broad-spectrum antibiotics.
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Affiliation(s)
- Michael B. Rothberg
- Center for Value-Based Care Research, Cleveland Clinic Community Care, Cleveland Clinic, Cleveland, Ohio
| | - Sarah Haessler
- Division of Infectious Diseases, University of Massachusetts Medical School – Baystate, Springfield, Massachusetts
| | - Abhishek Deshpande
- Center for Value-Based Care Research, Cleveland Clinic Community Care, Cleveland Clinic, Cleveland, Ohio
- Department of Infectious Disease, Respiratory Institute, Cleveland Clinic, Cleveland, Ohio
| | - Pei-Chun Yu
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio
| | - Peter K. Lindenauer
- Institute for Healthcare Delivery and Population Science and Department of Medicine, University of Massachusetts Medical School–Baystate, Springfield, Massachusetts
| | - Marya D. Zilberberg
- University of Massachusetts, Amherst, Massachusetts, and EviMed Research Group, Goshen, Massachusetts
| | - Thomas L. Higgins
- Division of Pulmonary and Critical Care Medicine, University of Massachusetts Medical School–Baystate, Springfield, Massachusetts
- The Center for Case Management, Natick, Massachusetts
| | - Peter B. Imrey
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio
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11
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Hafidi Z, Pérez L, El Achouri M, Pons R. Phenylalanine and Tryptophan-Based Surfactants as New Antibacterial Agents: Characterization, Self-Aggregation Properties, and DPPC/Surfactants Vesicles Formulation. Pharmaceutics 2023; 15:1856. [PMID: 37514042 PMCID: PMC10384047 DOI: 10.3390/pharmaceutics15071856] [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: 05/19/2023] [Revised: 06/16/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
Cationic surfactants based on phenylalanine (CnPC3NH3Cl) and tryptophan (CnTC3NH3Cl) were synthesized using renewable raw materials as starting compounds and a green synthetic procedure. The synthesis, acid-base equilibrium, aggregation properties, and antibacterial activity were investigated. Conductivity and fluorescence were used to establish critical micelle concentrations. Micellization of CnPC3NH3Cl and CnTC3NH3Cl occurred in the ranges of 0.42-16.2 mM and 0.29-4.6 mM, respectively. Since those surfactants have some acidic character, the apparent pKa was determined through titrations, observing increasing acidity with increasing chain length and being slightly more acidic with the phenylalanine than the tryptophan derivatives. Both families showed promising antibacterial efficacy against eight different bacterial strains. Molecular docking studies against the enzyme peptidoglycan glycosyltransferase (PDB ID:2OQO) were used to investigate the potential binding mechanism of target surfactant molecules. According to small angle X-ray scattering (SAXS) results, the surfactants incorporate into DPPC (Dipalmitoyl Phosphatidyl Choline) bilayers without strong perturbation up to high surfactant concentration. Some of the C12TC3NH3Cl/DPPC formulations (40%/60% and 20%/80% molar ratios) exhibited good antibacterial activity, while the others were not effective against the tested bacteria. The strong affinity between DPPC and surfactant molecules, as determined by the DFT (density functional theory) method, could be one of the reasons for the loss of antibacterial activity of these cationic surfactants when they are incorporated in vesicles.
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Affiliation(s)
- Zakaria Hafidi
- Department of Surfactants and Nanobiotechnology, IQAC-CSIC, 08034 Barcelona, Spain
- Laboratoire de Physico-Chimie des Matériaux Inorganiques et Organiques, Centre des Sciences des Matériaux, Ecole Normale Supérieure-Rabat, Mohammed V Université in Rabat, Rabat 5118, Morocco
| | - Lourdes Pérez
- Department of Surfactants and Nanobiotechnology, IQAC-CSIC, 08034 Barcelona, Spain
| | - Mohammed El Achouri
- Laboratoire de Physico-Chimie des Matériaux Inorganiques et Organiques, Centre des Sciences des Matériaux, Ecole Normale Supérieure-Rabat, Mohammed V Université in Rabat, Rabat 5118, Morocco
- Centre des Sciences et Technologies de la Formulation, Rabat 5118, Morocco
| | - Ramon Pons
- Department of Surfactants and Nanobiotechnology, IQAC-CSIC, 08034 Barcelona, Spain
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Algethami JS, Hassan MS, Amna T, Sheikh FA, Alhamami MAM, Seliem AF, Faisal M, Kim HY. Nanotextured CeO 2-SnO 2 Composite: Efficient Photocatalytic, Antibacterial, and Energy Storage Fibers. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13061001. [PMID: 36985895 PMCID: PMC10052679 DOI: 10.3390/nano13061001] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/01/2023] [Accepted: 03/07/2023] [Indexed: 05/27/2023]
Abstract
Bacterial infections remain a serious and pervasive threat to human health. Bacterial antibiotic resistance, in particular, lowers treatment efficacy and increases mortality. The development of nanomaterials has made it possible to address issues in the biomedical, energy storage, and environmental fields. This paper reports the successful synthesis of CeO2-SnO2 composite nanofibers via an electrospinning method using polyacrylonitrile polymer. Scanning and transmission electron microscopy assessments showed that the average diameter of CeO2-SnO2 nanofibers was 170 nm. The result of photocatalytic degradation for methylene blue dye displayed enhanced efficiency of the CeO2-SnO2 composite. The addition of SnO2 to CeO2 resulted in the enhancement of the light absorption property and enriched charge transmission of photoinduced electron-hole duos, which conspicuously contributed to momentous photoactivity augmentation. Composite nanofibers exhibited higher specific capacitance which may be accredited to the synergism between CeO2 and SnO2 particles in nanofibers. Furthermore, antibacterial activity was screened against Escherichia coli and CeO2-SnO2 composite nanofibers depicted excellent activity. The findings of this work point to new possibilities as an electrode material in energy storage systems and as a visible-light-active photocatalyst for the purification of chemical and biological contaminants, which would substantially benefit environmental remediation processes.
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Affiliation(s)
- Jari S. Algethami
- Department of Chemistry, College of Science and Arts, Najran University, Najran 11001, Saudi Arabia
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
| | - M. Shamshi Hassan
- Department of Chemistry, College of Science, Albaha University, Albaha 65799, Saudi Arabia
| | - Touseef Amna
- Department of Biology, College of Science, Albaha University, Albaha 65799, Saudi Arabia
| | - Faheem A. Sheikh
- Nanostructured and Biomimetic Lab, Department of Nanotechnology, University of Kashmir Hazratbal, Srinagar 190006, India
| | - Mohsen A. M. Alhamami
- Department of Chemistry, College of Science and Arts, Najran University, Najran 11001, Saudi Arabia
| | - Amal F. Seliem
- Department of Chemistry, College of Science and Arts, Najran University, Najran 11001, Saudi Arabia
| | - M. Faisal
- Department of Chemistry, College of Science and Arts, Najran University, Najran 11001, Saudi Arabia
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
| | - H. Y. Kim
- Organic Materials and Fibers Engineering Department, Chonbuk National University, Jeonju 560011, Republic of Korea
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13
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Leuconostoc lactis Bacteremia and Neutropenic Fever. INFECTIOUS DISEASES IN CLINICAL PRACTICE 2023. [DOI: 10.1097/ipc.0000000000001234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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14
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Alam A, Jawaid T, Alsanad SM, Kamal M, Balaha MF. Composition, Antibacterial Efficacy, and Anticancer Activity of Essential Oil Extracted from Psidium guajava (L.) Leaves. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12020246. [PMID: 36678958 PMCID: PMC9863818 DOI: 10.3390/plants12020246] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/12/2022] [Accepted: 12/23/2022] [Indexed: 06/01/2023]
Abstract
Essential oils (EO) are used as a natural remedy to treat various chronic diseases, although clinical evidence is lacking. In this context, we have endeavored to measure the percentage of chemical composition and biological efficacy of Psidium guajava (guava) leaf essential oil in treating oral infections and oral cancer. The essential oil obtained from hydrodistillation of P. guajava L. leaves was analyzed by gas chromatography−mass spectrometry (GC−MS). The activities of selected oral pathogens Candida albicans (C. albicans) and Streptococcus mutans (S. mutants) were studied in vitro and in silico. MTT assay was used to test for anticancer activity against human oral epidermal carcinoma (KB). GC−MS showed that the main components of PGLEO were limonene (38.01%) and β-caryophyllene (27.98%). Minimum inhibitory concentrations (MICs) of 0.05−0.1% were demonstrated against C. albicans and S. mutans. Antimicrobial activity against C. albicans and S. mutans, as shown by molecular linkage analysis, revealed that the main metabolites, limonene and β-caryophyllene, potentially inhibited the receptors of C. albicans and S. mutans. PGLEO showed significant (p < 0.001) anticancer activity (45.89%) at 200 µg/mL compared to doxorubicin (47.87%) with an IC50 value of 188.98 µg/mL. The outcomes of the present study suggest that PGLEO has promising antimicrobial and anticancer activities and could be a useful source for developing a natural therapeutic agent for oral infections and oral cancer.
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Affiliation(s)
- Aftab Alam
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Talha Jawaid
- Department of Pharmacology, College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 13317, Saudi Arabia
| | - Saud M. Alsanad
- Department of Pharmacology, College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 13317, Saudi Arabia
| | - Mehnaz Kamal
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohamed F. Balaha
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
- Pharmacology Department, Faculty of Medicine, Tanta University, Tanta 31527, Egypt
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15
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Xu Y, Zheng Z, Ye L, Chan EWC, Chen S. High prevalence of qnrVC variants in Vibrio spp. isolated from food samples in South China. Microbiol Res 2022; 267:127261. [PMID: 36434989 DOI: 10.1016/j.micres.2022.127261] [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: 09/24/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
Phenotypic resistance to fluoroquinolones due to mutational changes in the gyrA and parC genes is common among clinical Vibrio strains; the plasmid-mediated quinolone resistance (PMQR) qnrVC genes were also suggested to play a role in enhancing resistance development. This study investigated the prevalence of qnrVC genes in foodborne Vibrio strains collected in Shenzhen, China, during the period August 2015 and April 2017. A total of 1811 foodborne Vibrio strains were collected, mostly (73.8%) from shrimp samples and 20.2% of these strains were resistant to ciprofloxacin. Investigation of resistance mechanisms showed that mutations in the gyrA and parC genes were commonly associated with ciprofloxacin resistance. The presence of qnrVC genes was shown to enhance ciprofloxacin MIC in Vibrio strains and 69.7% of Vibrio strains that harbored target mutations also carried qnrVC genes, yet only 27.5% of the isolates not harboring such mutations carried the qnrVC genes. A total of 141 strains were found to carry the qnrVC alleles, with qnrVC5 and qnrVC1 being the most common types. Fourteen qnrVC variant genes that contained novel mutations were detectable, with 12 (85.7%) involving qnrVC5-like alleles. For the first time, we found a variant that was likely formed by the recombination of qnrVC1 and qnrVC5. The genetic context of the qnrVC genes found in this study was highly variable, with most being accompanied by mobile genetic elements and other resistance genes. The increasing prevalence of qnrVC genes in Vibrio and its contribution on mediating the development of ciprofloxacin resistance need to be further investigated.
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Affiliation(s)
- Yating Xu
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Zhiwei Zheng
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong; City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Lianwei Ye
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Edward Wai-Chi Chan
- State Key Lab of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Sheng Chen
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China.
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16
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Serendipitous identification of phenylhydrazine derivatives as potent inhibitors of carbapenem-resistant Acinetobacter baumannii. Future Med Chem 2022; 14:1621-1634. [PMID: 36326019 DOI: 10.4155/fmc-2022-0156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Background: In the authors' previous study, 4-(2-((3-methyl-4-oxo-2-thioxo/dioxothiazolidin-5-ylidene) methyl) hydrazineyl) benzonitriles were found to demonstrate potent antibacterial activity against Acinetobacter baumannii. Interestingly, the aforementioned compounds contain a 4-cyanophenylhydrazine motif. Materials & methods: Intrigued by this observation, the authors focused on preparing a library of 4-cyanophenylhydrazine derivatives and studied their detailed antibacterial potential. Results: This study led to the identification of a 4-cyanophenylhydrazine with potent inhibitory activity against carbapenem-resistant A. baumannii BAA-1605, with minimum inhibitory concentration (MIC) of 0.25 μg/ml and highest selectivity index of 640. The compound also demonstrated potent inhibition against multidrug-resistant A. baumannii isolates (MIC: 0.25-1 μg/ml). Conclusion: The identified 4-cyanophenylhydrazine compound exhibited synergistic activity with amikacin, tobramycin and polymyxin B against carbapenem-resistant A. baumannii BAA-1605.
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17
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Baliram Gaikwad N, Kumar Sahoo S, Ommi O, Naiyaz Ahmad M, Pathan A, Kaul G, Nanduri S, Dasgupta A, Chopra S, Madhavi Yaddanapudi V. Identification of 1,3‐Substituted Pyrazole‐Based Carboxamide Derivatives as Potent Antitubercular Agents. ChemistrySelect 2022. [DOI: 10.1002/slct.202203333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nikhil Baliram Gaikwad
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500037, Telangana India
| | - Santosh Kumar Sahoo
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500037, Telangana India
| | - Ojaswitha Ommi
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500037, Telangana India
| | - Mohammad Naiyaz Ahmad
- Division of Molecular Microbiology and Immunology CSIR-Central Drug Research Institute Sector 10, Janakipuram Extension Sitapur Road Lucknow 226031, UP India
- AcSIR: Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Afroz Pathan
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500037, Telangana India
| | - Grace Kaul
- Division of Molecular Microbiology and Immunology CSIR-Central Drug Research Institute Sector 10, Janakipuram Extension Sitapur Road Lucknow 226031, UP India
- AcSIR: Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Srinivas Nanduri
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500037, Telangana India
| | - Arunava Dasgupta
- Division of Molecular Microbiology and Immunology CSIR-Central Drug Research Institute Sector 10, Janakipuram Extension Sitapur Road Lucknow 226031, UP India
- AcSIR: Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Sidharth Chopra
- Division of Molecular Microbiology and Immunology CSIR-Central Drug Research Institute Sector 10, Janakipuram Extension Sitapur Road Lucknow 226031, UP India
- AcSIR: Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Venkata Madhavi Yaddanapudi
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER) Balanagar Hyderabad 500037, Telangana India
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18
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Sabry E, Mohamed HA, Ewies EF, Kariuki BM, Darwesh OM, Bekheit MS. Microwave-assisted synthesis of novel sulfonamide-based compounds bearing α-aminophosphonate and their antimicrobial properties. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Yang X, Wu JY. Synthetic Conditions, Physical Properties, and Antibacterial Activities of Silver Nanoparticles with Exopolysaccharides of a Medicinal Fungus. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5620. [PMID: 36013754 PMCID: PMC9412466 DOI: 10.3390/ma15165620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/04/2022] [Accepted: 08/14/2022] [Indexed: 05/14/2023]
Abstract
Natural polysaccharides are attractive and promising biomacromolecules for the green synthesis of silver nanoparticles (Ag NPs) with a broad spectrum of useful functions. This study aims to evaluate the synthetic conditions and physical properties of Ag NPs using three fractions of exopolysaccharide (EPS), namely EPS-1, EPS-2, and EPS-3, produced by a medicinal fungus known as Cs-HK1, with variations in their chemical composition and molecular weight. Each of the EPS fractions had a unique set of optimal synthetic conditions (reaction time course, temperature, and reagent concentration), resulting in a specific range of Ag NP size distributions. The Ag NPs synthesized with the EPS-1 fraction had the smallest particle size (~160 nm) and the most significant antibacterial activities against Escherichia coli (Gram-) and Staphylococcus aureus (Gram+), with a minimal inhibitory concentration (MIC) of 0.2 mg/mL on E. coli and 0.075 mg/mL on S. aureus. The results proved the success of the scheme of this green synthesis scheme with all three EPS fractions and the potential antibacterial application of EPS-coated Ag NPs.
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Affiliation(s)
| | - Jian-Yong Wu
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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20
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Sahoo SK, Gajula SNR, Ahmad MN, Kaul G, Nanduri S, Sonti R, Dasgupta A, Chopra S, Yaddanapudi VM. Bioevaluation of quinoline-4-carbonyl derivatives of piperazinyl-benzothiazinones as promising antimycobacterial agents. Arch Pharm (Weinheim) 2022; 355:e2200168. [PMID: 35876343 DOI: 10.1002/ardp.202200168] [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: 04/01/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 11/12/2022]
Abstract
The quinoline moiety remains a privileged antitubercular (anti-TB) pharmacophore, whereas 8-nitrobenzothiazinones are emerging potent antimycobacterial agents with two investigational candidates in the clinical pipeline. Herein, we report the synthesis and bioevaluation of 30 piperazinyl-benzothiazinone-based quinoline hybrids as prospective anti-TB agents. Preliminary evaluation revealed 24/30 compounds exhibiting substantial activity (minimum inhibitory concentration [MIC] = 0.06-1 µg/ml) against Mycobacterium tuberculosis (Mtb) H37Rv. Cytotoxicity analysis against Vero cells found these to be devoid of any significant toxicity, with the majority displaying a selectivity index of >80. Furthermore, potent nontoxic compounds, when screened against clinical isolates of drug-resistant Mtb strains, demonstrated equipotent inhibition with MIC values of 0.03-0.25 µg/ml. A time-kill study identified a lead compound exhibiting concentration-dependent bactericidal activity, with 10× MIC completely eliminating Mtb bacilli within 7 days. Along with acceptable aqueous solubility and microsomal stability, the optimum active compounds of the series manifested all desirable traits of a promising antimycobacterial candidate.
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Affiliation(s)
- Santosh K Sahoo
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Siva N R Gajula
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Mohammad N Ahmad
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India.,Biological Sciences Division, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Grace Kaul
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India.,Biological Sciences Division, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Srinivas Nanduri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Rajesh Sonti
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Arunava Dasgupta
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India.,Biological Sciences Division, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Sidharth Chopra
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India.,Biological Sciences Division, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Venkata M Yaddanapudi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
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21
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Kumar Sahoo S, Maddipatla S, Nageswara Rao Gajula S, Naiyaz Ahmad M, Kaul G, Nanduri S, Sonti R, Dasgupta A, Chopra S, Madhavi Yaddanapudi V. Identification of nitrofuranylchalcone tethered benzoxazole-2-amines as potent inhibitors of drug resistant Mycobacterium tuberculosis demonstrating bactericidal efficacy. Bioorg Med Chem 2022; 64:116777. [PMID: 35487101 DOI: 10.1016/j.bmc.2022.116777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/06/2022] [Accepted: 04/20/2022] [Indexed: 11/02/2022]
Abstract
Ever increasing drug resistance has become an impeding threat that continues to hamper effective tackling of otherwise treatable tuberculosis (TB). Such dismal situation necessitates identification and exploration of multitarget acting newer chemotypes with bactericidal efficacy as a priority, that could efficiently hinder uncontrolled spread of TB. In this context, herein we present design, synthesis and bio-evaluation of chalcone tethered bezoxazole-2-amines as promising anti-TB chemotypes. Preliminary screening of 24 compounds revealed initial hits 3,4,5-trimethoxyphenyl and 5-nitrofuran-2-yl derivative exhibiting selective inhibition of Mycobacterium tuberculosis (Mtb) H37Rv. Further, structural optimization of hit compounds generated 12 analogues, amongst which 5-nitrofuran-2-yl derivatives displayed potent inhibition of not only drug-susceptible (DS) Mtb but also clinical isolates of drug-resistant (DR) Mtb strains equipotently. Moreover, cell viability test against Vero cells found these compounds with favourable selectivity. Time kill analysis led to the identification of the lead compound (E)-1-(4-((5-chlorobenzo[d]oxazol-2-yl)amino)phenyl)-3-(5-nitrofuran-2-yl)prop-2-en-1-one, that demonstrated bactericidal killing of Mtb bacilli. Together with acceptable microsomal stability, the lead compound of the series manifested all desirable traits of a promising antitubercular agent.
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Affiliation(s)
- Santosh Kumar Sahoo
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, Telangana, India
| | - Sarvan Maddipatla
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, Telangana, India
| | - Siva Nageswara Rao Gajula
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER),Balanagar, Hyderabad 500037, Telangana, India
| | - Mohammad Naiyaz Ahmad
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow 226031, UP, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Grace Kaul
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow 226031, UP, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Srinivas Nanduri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, Telangana, India
| | - Rajesh Sonti
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER),Balanagar, Hyderabad 500037, Telangana, India.
| | - Arunava Dasgupta
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow 226031, UP, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Sidharth Chopra
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow 226031, UP, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Venkata Madhavi Yaddanapudi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, Telangana, India.
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22
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Yeung YWS, Ma Y, Liu SY, Pun WH, Chua SL. Prevalence of alcohol-tolerant and antibiotic-resistant bacterial pathogens on public hand sanitizer dispensers. J Hosp Infect 2022; 127:26-33. [PMID: 35690267 PMCID: PMC9176178 DOI: 10.1016/j.jhin.2022.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 11/28/2022]
Abstract
Background Since the advent of the COVID-19 pandemic, alcohol-based hand sanitizer dispensers (HSDs) have been installed in most public and clinical settings for hygiene purposes and convenient application. Aim To determine whether sanitizer-tolerant bacterial pathogens can colonize HSDs, spreading diseases and antibiotic resistance. Methods Sampling was conducted from operational automatic HSDs, specifically the dispensing nozzle in direct contact with sanitizer. Culture-dependent cultivation of bacteria and MALDI-TOF were employed to assess microbiological contamination. Bacterial isolates were selected for rapid killing and biofilm eradication assays with alcohol treatment. Antibiotic minimum inhibitory concentration assays were performed according to the Clinical and Laboratory Standards Institute guidelines. Virulence potential of bacterial isolates was evaluated in the Caenorhadbitis elegans infection model. Findings Nearly 50% of HSDs from 52 locations, including clinical settings, food industry, and public spaces, contain microbial contamination at 103–106 bacteria/mL. Bacterial identification revealed Bacillus cereus as the most frequent pathogen (29%), while Enterobacter cloacae was the only Gram-negative bacterial pathogen (2%). Selecting B. cereus and E. cloacae isolates for further evaluation, these isolates and associated biofilms were found to be tolerant to alcohol with survival up to 70%. They possessed resistance to various antibiotic classes, with higher virulence than laboratory strains in the C. elegans infection model. Conclusion HSDs serve as potential breeding grounds for dissemination of pathogens and antibiotic resistance across unaware users. Proper HSD maintenance will ensure protection of public health and sustainable use of sanitizing alcohols, to prevent emergence of alcohol-resistant pathogens.
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Affiliation(s)
- Yoyo Wing Suet Yeung
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR China
| | - Yeping Ma
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR China
| | - Sylvia Yang Liu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR China
| | | | - Song Lin Chua
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR China; State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR China; Research Centre for Deep Space Explorations (RCDSE), The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR China; Shenzhen Key Laboratory of Food Biological Safety Control.
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23
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Kumar Sahoo S, Naiyaz Ahmad M, Kaul G, Nanduri S, Dasgupta A, Chopra S, Madhavi Yaddanapudi V. Exploration of Isoxazole-Carboxylic Acid Methyl Ester Based 2-Substituted Quinoline Derivatives as Promising Antitubercular Agents. Chem Biodivers 2022; 19:e202200324. [PMID: 35653161 DOI: 10.1002/cbdv.202200324] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 06/02/2022] [Indexed: 12/12/2022]
Abstract
In pursuit of potent anti-TB agents active against drug resistant tuberculosis (DR-TB), herein we report synthesis and bio-evaluation of a new series of isoxazole-carboxylic acid methyl ester based 2-substituted quinoline derivatives. Preliminary evaluation indicated selectivity towards Mtb H37Rv, with no inhibition of non-tubercular mycobacterial (NTM) & bacterial pathogen panel. Out of 36 synthesized compounds, majority exhibited substantial inhibition of Mtb H37Rv (MIC 0.5-8 μg/mL). Cell viability test against Vero cells revealed no significant cytotoxicity. Further, screening against drug resistant strains (DR-Mtb) found hit compound displaying promising potency (MIC 1-4 μg/mL). Structure optimization of the hit led to the identification of lead compound demonstrating potent inhibition of both drug-susceptible Mtb (MIC 0.12 μg/mL) and drug-resistant Mtb (MIC 0.25-0.5 μg/mL) along with a high selectivity index (SI) >80. Taken together, with appreciable selectivity and potent activity, these chemotypes show prospect to be turned into a potential anti-TB candidate.
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Affiliation(s)
- Santosh Kumar Sahoo
- Department of chemical sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, India
| | - Mohammad Naiyaz Ahmad
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow, 226031, UP, India.,AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Grace Kaul
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow, 226031, UP, India.,AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Srinivas Nanduri
- Department of chemical sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, India
| | - Arunava Dasgupta
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow, 226031, UP, India.,AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Sidharth Chopra
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow, 226031, UP, India.,AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Venkata Madhavi Yaddanapudi
- Department of chemical sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, India
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24
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Microbiologic Analysis of Removed Silicone Punctal Plugs in Dry Eye Patients. J Clin Med 2022; 11:jcm11092326. [PMID: 35566452 PMCID: PMC9103617 DOI: 10.3390/jcm11092326] [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: 03/20/2022] [Revised: 04/11/2022] [Accepted: 04/15/2022] [Indexed: 11/23/2022] Open
Abstract
This study analyzed the microbiologic results of removing silicone punctal plugs due to uncomfortable symptoms in dry-eye patients. Patients who were diagnosed with dry eye and received silicone punctal plugs—SuperEagle Punctum Plug™ (EagleVision, Denville, NJ, USA) or Parasol Punctum Plug™ (Beaver–Visitec international, Inc., Waltham, MA, USA)—into upper or lower puncta that were removed due to discomfort from January 2018 to June 2020 were enrolled and reviewed retrospectively. Out of the total 58 patients (64 eyes), 19 patients were male and 39 patients were female. Protrusion without granulation (21 patients, 32.8%) was the most common reason for plug removal, followed by protrusion with granuloma (19 patients, 29.7%). The positive rate of bacterial culture was 42.2% and Klebsiella aerogenes was the most common organism identified (18.5%). Vancomycin showed the highest susceptibility of 100% among all the antibiotics, third-generation cephalosporins were the most susceptible (88.5%) among cephalosporines, and levofloxacin was the most susceptible (81.0%) among quinolones. Among the patients who complained of discomfort after insertion of silicone punctal plugs, approximately 42% had a positive result in bacterial culture. Therefore, when removing punctal plugs in such patients, a microbiological examination may be needed for the appropriate selection of antibiotics.
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25
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Ezz Eldin RR, Saleh MA, Alotaibi MH, Alsuair RK, Alzahrani YA, Alshehri FA, Mohamed AF, Hafez SM, Althoqapy AA, Khirala SK, Amin MM, A. F Y, AbdElwahab AH, Alesawy MS, Elmaaty AA, Al-Karmalawy AA. Ligand-based design and synthesis of N'-Benzylidene-3,4-dimethoxybenzohydrazide derivatives as potential antimicrobial agents; evaluation by in vitro, in vivo, and in silico approaches with SAR studies. J Enzyme Inhib Med Chem 2022; 37:1098-1119. [PMID: 35430934 PMCID: PMC9037180 DOI: 10.1080/14756366.2022.2063282] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Affiliation(s)
- Rogy R. Ezz Eldin
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Port Said University, Port Said, Egypt
| | - Marwa A. Saleh
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo, Egypt
| | - Mohammad Hayal Alotaibi
- National Center for Chemical Technologies, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Reem K. Alsuair
- National Center for Chemical Technologies, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Yahya A. Alzahrani
- National Center for Chemical Technologies, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Feras A. Alshehri
- National Center for Chemical Technologies, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Amany F. Mohamed
- Department of Anatomy and Embryology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - Shaimaa M. Hafez
- Department of Anatomy and Embryology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - Azza Ali Althoqapy
- Department of Microbiology and Immunology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - Seham K. Khirala
- Department of Microbiology and Immunology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - Mona M. Amin
- Department of Pharmacology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - Yousuf A. F
- Department of Physiology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - Azza H. AbdElwahab
- Department of Physiology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - Mohamed S. Alesawy
- Pharmaceutical Medicinal Chemistry and Drug Design Department, Faculty of Pharmacy (Boys), Al‐Azhar University, Cairo, Egypt
| | - Ayman Abo Elmaaty
- Department of Medicinal Chemistry, Faculty of Pharmacy, Port Said University, Port Said, Egypt
| | - Ahmed A. Al-Karmalawy
- Department of Pharmaceutical Medicinal Chemistry, Faculty of Pharmacy, Horus University-Egypt, New Damietta, Egypt
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26
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Alghamdi MD, Nazreen S, Ali NM, Amna T. ZnO Nanocomposites of Juniperus procera and Dodonaea viscosa Extracts as Antiproliferative and Antimicrobial Agents. NANOMATERIALS 2022; 12:nano12040664. [PMID: 35214995 PMCID: PMC8875860 DOI: 10.3390/nano12040664] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 02/11/2022] [Accepted: 02/13/2022] [Indexed: 02/04/2023]
Abstract
Cancer and microbial infections constitute a major burden and leading cause of death globally. The development of therapeutic compounds from natural products is considered a cornerstone in drug discovery. Therefore, in the present study, the ethanolic extract and the fractions of Dodonaea viscosa and Juniperus procera were evaluated for anticancer and antimicrobial activities. It was found that two fractions, JM and DC, exhibited promising anticancer and antimicrobial activities. The JM and DC fractions were further modified into ZnO nanocomposites, which were characterized by SEM, XRD, TGA, and EDX. It was noted that the synthesized nanocomposites displayed remarkable enhancement in cytotoxicity as well as antibacterial activity. Nanocomposite DC–ZnO NRs exhibited cytotoxicity with IC50 values of 16.4 ± 4 (HepG2) and 29.07 ± 2.7 μg/mL (HCT-116) and JM–ZnO NRs with IC50 values of 12.2 ± 10.27 (HepG2) and 24.1 ± 3.0 μg/mL (HCT-116). In addition, nanocomposites of DC (i.e., DC–ZnO NRs) and JM (i.e., JM–ZnO NRs) displayed excellent antimicrobial activity against Staphylococcus aureus with MICs of 2.5 and 1.25 μg/mL, respectively. Moreover, these fractions and nanocomposites were tested for cytotoxicity against normal fibroblasts and were found to be non-toxic. GC-MS analysis of the active fractions were also carried out to discover the possible phytochemicals that are responsible for these activities.
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Affiliation(s)
- Maha D. Alghamdi
- Chemistry Department, Faculty of Science, Albaha University, P.O. Box 1988, Albaha 65799, Saudi Arabia; (M.D.A.); (N.M.A.)
| | - Syed Nazreen
- Chemistry Department, Faculty of Science, Albaha University, P.O. Box 1988, Albaha 65799, Saudi Arabia; (M.D.A.); (N.M.A.)
- Correspondence: (S.N.); (T.A.)
| | - Nada M. Ali
- Chemistry Department, Faculty of Science, Albaha University, P.O. Box 1988, Albaha 65799, Saudi Arabia; (M.D.A.); (N.M.A.)
| | - Touseef Amna
- Department of Biology, Faculty of Science, Albaha University, P.O. Box 1988, Albaha 65799, Saudi Arabia
- Correspondence: (S.N.); (T.A.)
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27
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Role of Bioaerosols on the Short-Distance Transmission of Multidrug-Resistant Methicillin-Resistant Staphylococcus aureus (MRSA) in a Chicken Farm Environment. Antibiotics (Basel) 2022; 11:antibiotics11010081. [PMID: 35052958 PMCID: PMC8773248 DOI: 10.3390/antibiotics11010081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 01/04/2022] [Accepted: 01/07/2022] [Indexed: 02/05/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a dynamic and tenacious pathogenic bacterium which is prevalent in livestock farming environments. This study investigated the possibility of MRSA spread via bioaerosol transmission from an indoor chicken farm environment to outdoors downwind (up to 50 m). The concentration of total airborne bacteria colony formation units (CFUs) was decreased with increasing sampling distance ranging from 9.18 × 101 to 3.67 × 103 per air volume (m3). Among the 21 MRSA isolates, 15 were isolated from indoor chicken sheds and exposure square areas, whereas 6 were isolated from downwind bioaerosol samples. Molecular characterization revealed that all of them carried the staphylococcal cassette chromosome mec (SCCmec) VIII, and they were remarkably linked with the hospital-associated MRSA group. Spa typing analysis determined that all MRSA isolates belonged to spa type t002. Virulence analysis showed that 100% of total isolates possessed exfoliative toxin A (eta), whereas 38.09% and 23.80% strains carried exfoliative toxin B (etb) and enterotoxin A (entA). Additionally, all of these MRSA isolates carried multidrug resistance properties and showed their resistance against chloramphenicol, ciprofloxacin, clindamycin, tetracycline, and erythromycin. In addition, chi-squared statistical analysis displayed a significant distributional relationship of gene phenotypes between MRSA isolates from chicken farm indoor and downwind bioaerosol samples. The results of this study revealed that chicken farm indoor air might act as a hotspot of MRSA local community-level outbreak, wherein the short-distance dispersal of MRSA could be supported by bioaerosols.
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28
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Hem S, Jarocki VM, Baker DJ, Charles IG, Drigo B, Aucote S, Donner E, Burnard D, Bauer MJ, Harris PNA, Wyrsch ER, Djordjevic SP. Genomic analysis of Elizabethkingia species from aquatic environments: Evidence for potential clinical transmission. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100083. [PMID: 34988536 PMCID: PMC8703026 DOI: 10.1016/j.crmicr.2021.100083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 12/12/2022] Open
Abstract
Identification of closely related (< 50 SNV) clinical and environmental aquatic Elizabethkingia anophelis isolates. Identification of a provisional novel species Elizabethkingia umaracha. Novel blaGOB and blaB carbapenemases and extended spectrum β-lactamase blaCME alleles identified in Elizabethkingia spp. Analysis of the global phylogeny and pangenome of Elizabethkingia spp. Identification of novel ICE elements carrying uncharacterised genetic cargo in 67 / 94 (71.3%) of the aquatic environments Elizabethkingia spp.
Elizabethkingia species are ubiquitous in aquatic environments, colonize water systems in healthcare settings and are emerging opportunistic pathogens with reports surfacing in 25 countries across six continents. Elizabethkingia infections are challenging to treat, and case fatality rates are high. Chromosomal blaB, blaGOB and blaCME genes encoding carbapenemases and cephalosporinases are unique to Elizabethkingia spp. and reports of concomitant resistance to aminoglycosides, fluoroquinolones and sulfamethoxazole-trimethoprim are known. Here, we characterized whole-genome sequences of 94 Elizabethkingia isolates carrying multiple wide-spectrum metallo-β-lactamase (blaBand blaGOB) and extended-spectrum serine‑β-lactamase (blaCME) genes from Australian aquatic environments and performed comparative phylogenomic analyses against national clinical and international strains. qPCR was performed to quantify the levels of Elizabethkingia species in the source environments. Antibiotic MIC testing revealed significant resistance to carbapenems and cephalosporins but susceptibility to fluoroquinolones, tetracyclines and trimethoprim-sulfamethoxazole. Phylogenetics show that three environmental E. anophelis isolates are closely related to E. anophelis from Australian clinical isolates (∼36 SNPs), and a new species, E. umeracha sp. novel, was discovered. Genomic signatures provide insight into potentially shared origins and a capacity to transfer mobile genetic elements with both national and international isolates.
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Affiliation(s)
- Sopheak Hem
- iThree Institute, University of Technology Sydney, Ultimo, NSW 2007, Australia.,Australian Centre for Genomic Epidemiological Microbiology, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
| | - Veronica M Jarocki
- iThree Institute, University of Technology Sydney, Ultimo, NSW 2007, Australia.,Australian Centre for Genomic Epidemiological Microbiology, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
| | - Dave J Baker
- Quadram Institute Bioscience, Norwich, United Kingdom
| | - Ian G Charles
- Quadram Institute Bioscience, Norwich, United Kingdom.,Norwich Medical School, Norwich Research Park, Colney Lane, Norwich NR4 7TJ, United Kingdom
| | - Barbara Drigo
- Future Industries Institute, University of South Australia, Adelaide, SA 5001, Australia
| | - Sarah Aucote
- Future Industries Institute, University of South Australia, Adelaide, SA 5001, Australia
| | - Erica Donner
- Future Industries Institute, University of South Australia, Adelaide, SA 5001, Australia
| | - Delaney Burnard
- University of Queensland Centre for Clinical Research, Royal Brisbane and Woman's Hospital, Building 71/918 Royal Brisbane and Women's Hospital Campus, Herston, QLD 4029, Australia
| | - Michelle J Bauer
- University of Queensland Centre for Clinical Research, Royal Brisbane and Woman's Hospital, Building 71/918 Royal Brisbane and Women's Hospital Campus, Herston, QLD 4029, Australia
| | - Patrick N A Harris
- University of Queensland Centre for Clinical Research, Royal Brisbane and Woman's Hospital, Building 71/918 Royal Brisbane and Women's Hospital Campus, Herston, QLD 4029, Australia
| | - Ethan R Wyrsch
- iThree Institute, University of Technology Sydney, Ultimo, NSW 2007, Australia.,Australian Centre for Genomic Epidemiological Microbiology, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
| | - Steven P Djordjevic
- iThree Institute, University of Technology Sydney, Ultimo, NSW 2007, Australia.,Australian Centre for Genomic Epidemiological Microbiology, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
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29
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Chaudhary N, Aggarwal B, Saini V, Sharma P, Srinivas P, Srivastava A, Bajaj A. Polyaspartate-derived Synthetic Antimicrobial Polymer Enhances Activity of Rifampicin against Multi-drug Resistant Pseudomonas aeruginosa Infections. Biomater Sci 2022; 10:5158-5171. [DOI: 10.1039/d2bm00524g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Infections caused by multi-drug resistant Pseudomonas aeruginosa (P. aeruginosa) face major challenges for treatment due to acquired, adaptive, and intrinsic resistance developed by bacteria due to accumulation of mutations, ability...
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30
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Ismail F, Haq S, Aiayad M, Abushiba M, Zorgani A. Antibiotic resistance patterns of urinary pathogens in outpatients and inpatients: A report from Eastern Libya. INTERNATIONAL JOURNAL OF UROLOGICAL NURSING 2021. [DOI: 10.1111/ijun.12301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Faisal Ismail
- Medical Laboratory Department, Faculty of Medical Technology University of Tobruk Tobruk Libya
- National Centre for Disease Control Tobruk Libya
- Libyan Medical Research Centre Kambut Libya
| | - Soghra Haq
- Medical Laboratory Department, Faculty of Medical Technology University of Tobruk Tobruk Libya
| | - Manal Aiayad
- Microbiology Laboratory Tobruk Medical Centre Tobruk Libya
| | - Mahmoud Abushiba
- Biology Department, Faculty of Science Azzaytuna University Tarhuna Libya
| | - Abdulaziz Zorgani
- Medical Microbiology and Immunology Department, Faculty of Medicine University of Tripoli Tripoli Libya
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31
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Wareth G, El-Diasty M, Abdel-Hamid NH, Holzer K, Hamdy ME, Moustafa S, Shahein MA, Melzer F, Beyer W, Pletz MW, Neubauer H. Molecular characterization and antimicrobial susceptibility testing of clinical and non-clinical Brucella melitensis and Brucella abortus isolates from Egypt. One Health 2021; 13:100255. [PMID: 34027005 PMCID: PMC8122161 DOI: 10.1016/j.onehlt.2021.100255] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/23/2021] [Accepted: 04/25/2021] [Indexed: 12/16/2022] Open
Abstract
Brucellosis is a highly contagious and incapacitating disease of humans, livestock and wildlife species globally. Treatment of brucellosis in animals is not recommended, and in humans, combinations of antibiotics recommended by the World Health Organization are used. However, sporadic antimicrobial-resistant (AMR) isolates and relapse cases have been reported from different endemic regions. In the current study, molecular characterization and antibiotic susceptibility testing using the microdilution method for 35 B. abortus and B. melitensis strains isolated from humans, milk and animal were carried out. Additionally, Next-Generation-Sequencing (NGS) technology was applied to confirm Brucella at the species level and investigate AMR and pathogenicity-associated determinants. MALDI-TOF seemed to be a rapid and reliable tool for routine identification of brucellae to the genus level; however, DNA-based identification is indispensable for accurate species identification. Brucella abortus strains were isolated from two human cases and a sheep. Such infections are uncommon in Egypt. Egyptian Brucella strains are still in-vitro susceptible to doxycycline, tetracyclines, gentamicin, ciprofloxacin, levofloxacin, chloramphenicol, streptomycin, trimethoprim/sulfamethoxazole and tigecycline. Probable (no CLSI/EUCAST breakpoints have been defined yet) in-vitro resistance to rifampicin and azithromycin was observed. WGS failed to determine classical AMR genes, and no difference in the distribution of virulence-associated genes in all isolates was found. Isolates of human and non-human origins were still susceptible to the majority of antibiotics used for treatment in humans. The absence of classical AMR genes in genomes of "resistant" Brucella strains may reflect a lack of information in databases, or resistance might not be encoded by single resistance genes. The One Health approach is necessary for tackling brucellosis. Continuous susceptibility testing, updating of breakpoints, assessing mutations that lead to resistance are needed.
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Affiliation(s)
- Gamal Wareth
- Friedrich-Loeffler-Institut, Institute of Bacterial Infections and Zoonoses, Naumburger Str. 96a, 07743 Jena, Germany
- Institute for Infectious Diseases and Infection Control, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
- Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh 13736, Egypt
| | - Mohamed El-Diasty
- Animal Health Research Institute, Agricultural Research Center, P.O. Box 264-Giza, Cairo 12618, Egypt
| | - Nour H. Abdel-Hamid
- Animal Health Research Institute, Agricultural Research Center, P.O. Box 264-Giza, Cairo 12618, Egypt
| | - Katharina Holzer
- Institute of Animal Science, Department of Livestock Infectiology and Environmental Hygiene, University of Hohenheim, 70599 Stuttgart, Germany
| | - Mahmoud E.R. Hamdy
- Animal Health Research Institute, Agricultural Research Center, P.O. Box 264-Giza, Cairo 12618, Egypt
| | - Shawky Moustafa
- Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh 13736, Egypt
| | - Momtaz A. Shahein
- Animal Health Research Institute, Agricultural Research Center, P.O. Box 264-Giza, Cairo 12618, Egypt
| | - Falk Melzer
- Friedrich-Loeffler-Institut, Institute of Bacterial Infections and Zoonoses, Naumburger Str. 96a, 07743 Jena, Germany
| | - Wolfgang Beyer
- Institute of Animal Science, Department of Livestock Infectiology and Environmental Hygiene, University of Hohenheim, 70599 Stuttgart, Germany
| | - Mathias W. Pletz
- Institute for Infectious Diseases and Infection Control, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
| | - Heinrich Neubauer
- Friedrich-Loeffler-Institut, Institute of Bacterial Infections and Zoonoses, Naumburger Str. 96a, 07743 Jena, Germany
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Baek SC, Cho CH, Lee SB. Comparative Clinical Analysis of Polymicrobial and Monomicrobial Bacterial Keratitis. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2021. [DOI: 10.3341/jkos.2021.62.11.1465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Purpose: We comparatively analyzed the microbiological profiles, predisposing factors, clinical aspects, and treatment outcomes of patients with polymicrobial and monomicrobial bacterial keratitis.Methods: A total of 194 cases of culture-proven bacterial keratitis treated between January 2007 and December 2016 were reviewed. Microbiological profiles, the epidemiology, predisposing factors, clinical characteristics, and treatment outcomes were compared between the polymicrobial group (polymicrobial bacterial keratitis [PBK]; 29 eyes, 62 isolates) and monomicrobial (monomicrobial bacterial keratitis [MBK]; 165 eyes, 165 isolates) group.Results: The most common isolates were Enterobacter (24%) in the PBK group and Staphylococcus (22%) in the MBK group. There were no significant differences between the two groups in previous ocular surface disease, previous ocular surgery, prior topical steroid use, epithelial defect size, and hypopyon. Age ≥60 years (PBK vs. MBK, 31% vs. 51%, p = 0.048), symptom duration (4.7 days vs. 8.0 days, p = 0.009), and contact lens use (34% vs. 18%, p = 0.036) were significantly different between the two groups. Regarding treatment outcomes, epithelial healing time ≥10 days, the final best-corrected visual acuity (BCVA), a need for surgical intervention, and the rate of poor clinical outcome were not significantly different between the two groups. Significant risk factors for a poor clinical outcome in all patients were an initial BCVA <0.1 (Z = 6.33, two-proportion Z-test), an epithelial defect size ≥5 mm2 (Z = 4.56), and previous ocular surface disease (Z = 4.36).Conclusions: Polymicrobial bacterial keratitis, compared to monomicrobial bacterial keratitis, was more significantly associated with younger age, contact lens use, and shorter symptom duration.
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Shan MY, Meng FQ, Zhou LB, Lu FX, Bie XM, Zhao HZ, Lu ZX. Surfactin inhibits the growth of Propionibacterium acnes by destroying the cell wall and membrane. Lett Appl Microbiol 2021; 73:684-693. [PMID: 34607389 DOI: 10.1111/lam.13576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/07/2021] [Accepted: 09/25/2021] [Indexed: 01/08/2023]
Abstract
Propionibacterium acnes plays a major role in acne vulgaris. In the pre-experiment, the growth of P. acnes was inhibited effectively using surfactin; however, the antibacterial mechanism has not been described. Therefore, the aim of this study was to evaluate antibacterial activity and analyse the mechanism of surfactin against P. acnes. Minimum inhibitory concentration, time-killing kinetics and scanning electron microscopy were used to evaluate the activity of surfactin against P. acnes, which showed that 128 μg ml-1 effectively inhibited growth. Cell wall permeability was evaluated by detecting the extracellular alkaline phosphatase activity, which increased to 1·83- and 2·32-fold after incubating with 128 and 256 μg ml-1 of surfactin for 10 h, respectively. Propidium iodide fluorescence, leakage of nucleic acid, protein, K+ , and Ca2+ , membrane potential and the leakage of calcein from small unilamellar vesicles all increased after incubation with surfactin, indicating that its strong biological activities act mainly by altering membrane integrity. In a mouse model of acne, surfactin significantly reduced P. acnes-induced epidermal swelling and erythema. These results indicate that surfactin effectively inhibited the growth of P. acnes by destroying the cell wall and membrane, and is a potential candidate for acne treatment.
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Affiliation(s)
- M Y Shan
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - F Q Meng
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - L B Zhou
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - F X Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - X M Bie
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - H Z Zhao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Z X Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
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34
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Akunuri R, Veerareddy V, Kaul G, Akhir A, Unnissa T, Parupalli R, Madhavi YV, Chopra S, Nanduri S. Synthesis and antibacterial evaluation of (E)-1-(1H-indol-3-yl) ethanone O-benzyl oxime derivatives against MRSA and VRSA strains. Bioorg Chem 2021; 116:105288. [PMID: 34454299 DOI: 10.1016/j.bioorg.2021.105288] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/15/2021] [Accepted: 08/16/2021] [Indexed: 10/20/2022]
Abstract
Infections caused due to multidrug resistant organisms have emerged as a constant menace to human health. Even though numerous antibiotics are currently available for treating infectious diseases, a great number of bacterial strains have acquired resistance to many of them. Among these, infections caused due to Staphylococcus aureus are predominant in adult and paediatric population. Indole is a prominent chemical scaffold found in many pharmacologically active natural products and synthetic drugs. A number of oxime ether containing compounds have attracted attention of researchers owing to their interesting biological properties. Current work details the synthesis of indole containing oxime ether derivatives and their evaluation for antimicrobial activity against a panel of bacterial and mycobacterial strains. Synthesized compounds demonstrated good to moderate activity against drug-resistant S. aureus including resistant to vancomycin. Among all, compound 5h was found to possess potent activity against susceptible as well as MRSA and VRSA strains of S. aureus with MIC of 1 µg/mL and 2-4 µg/mL respectively. In addition, compound 5h was found to be non-toxic to Vero cells and exhibited good selectivity index of >40. Further, 5h, E-9a and E-9b possessed good biofilm inhibition against S. aureus. With these assuring biological properties, synthesized compounds could be potential prospective antimicrobial agents.
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Affiliation(s)
- Ravikumar Akunuri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Vaishnavi Veerareddy
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Abdul Akhir
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow 226031, Uttar Pradesh, India
| | - Tanveer Unnissa
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Ramulu Parupalli
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Y V Madhavi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Srinivas Nanduri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India.
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Pell LG, Horne RG, Huntley S, Rahman H, Kar S, Islam MS, Evans KC, Saha SK, Campigotto A, Morris SK, Roth DE, Sherman PM. Antimicrobial susceptibilities and comparative whole genome analysis of two isolates of the probiotic bacterium Lactiplantibacillus plantarum, strain ATCC 202195. Sci Rep 2021; 11:15893. [PMID: 34354117 PMCID: PMC8342526 DOI: 10.1038/s41598-021-94997-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 07/13/2021] [Indexed: 12/24/2022] Open
Abstract
A synbiotic containing Lactiplantibacillus plantarum [American Type Culture Collection (ATCC) strain identifier 202195] and fructooligosaccharide was reported to reduce the risk of sepsis in young infants in rural India. Here, the whole genome of two isolates of L. plantarum ATCC 202195, which were deposited to the ATCC approximately 20 years apart, were sequenced and analyzed to verify their taxonomic and strain-level identities, identify potential antimicrobial resistant genes and virulence factors, and identify genetic characteristics that may explain the observed clinical effects of L. plantarum ATCC 202195. Minimum inhibitory concentrations for selected antimicrobial agents were determined using broth dilution and gradient strip diffusion techniques. The two L. plantarum ATCC 202195 isolates were genetically identical with only three high-quality single nucleotides polymorphisms identified, and with an average nucleotide identity of 99.99%. In contrast to previously published reports, this study determined that each isolate contained two putative plasmids. No concerning acquired or transferable antimicrobial resistance genes or virulence factors were identified. Both isolates were sensitive to several clinically important antibiotics including penicillin, ampicillin and gentamicin, but resistant to vancomycin. Genes involved in stress response, cellular adhesion, carbohydrate metabolism and vitamin biosynthesis are consistent with features of probiotic organisms.
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Affiliation(s)
- Lisa G Pell
- Centre for Global Child Health, Hospital for Sick Children, Toronto, ON, Canada
| | - Rachael G Horne
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Stuart Huntley
- International Flavors & Fragrances Inc., Madison, WI, USA
| | | | - Sanchita Kar
- Child Health Research Foundation, Dhaka, Bangladesh
| | | | - Kara C Evans
- International Flavors & Fragrances Inc., Madison, WI, USA
| | - Samir K Saha
- Child Health Research Foundation, Dhaka, Bangladesh
| | - Aaron Campigotto
- Department of Paediatrics, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Division of Microbiology, Hospital for Sick Children, Toronto, ON, Canada
| | - Shaun K Morris
- Centre for Global Child Health, Hospital for Sick Children, Toronto, ON, Canada
- Department of Paediatrics, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
- Division of Infectious Diseases, Hospital for Sick Children, Toronto, ON, Canada
| | - Daniel E Roth
- Centre for Global Child Health, Hospital for Sick Children, Toronto, ON, Canada.
- Department of Paediatrics, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.
- Paediatric Medicine and Child Health Evaluative Sciences, Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 686 Bay Street, Toronto, ON, M5G 0A4, Canada.
| | - Philip M Sherman
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada.
- Department of Paediatrics, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
- Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, 555 University Avenue, Toronto, ON, M5G 1X8, Canada.
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36
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Tao CW, Chen JS, Hsu BM, Koner S, Hung TC, Wu HM, Rathod J. Molecular Evaluation of Traditional Chicken Farm-Associated Bioaerosols for Methicillin-Resistant Staphylococcus aureus Shedding. Antibiotics (Basel) 2021; 10:antibiotics10080917. [PMID: 34438967 PMCID: PMC8388662 DOI: 10.3390/antibiotics10080917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/20/2021] [Accepted: 07/26/2021] [Indexed: 11/16/2022] Open
Abstract
The outbreak of airborne pathogens, such as methicillin-resistant Staphylococcus aureus (MRSA) through bioaerosol, and their molecular characterization around domestic poultry farming areas, was not completely understood. This imposes risk of a MRSA-associated health threat for the relevant livestock food production units. To address this issue, the present study investigated the role of bioaerosol in transmitting MRSA strains in poultry house settings by combining molecular typing, phylogenetic classification, antibiotic susceptibility, and virulence gene distribution patterns. The present study highlights that all 18 bioaerosol and stool samples collected were MRSA positive, with a unique set of virulence factors. Out of 57 isolated MRSA isolates, 68.4% and 19.3% consisted of SCCmec I and IV elements, respectively, which are commonly linked with hospital-acquired and livestock-associated MRSA strains. It is worth noting that the exfoliative toxin eta and etb genes were carried by 100% and 70.2% of all isolates, respectively. Only 17.5% of strains showed the presence of enterotoxin entC. These MRSA isolates were resistant to chloramphenicol (C), ciprofloxacin (CIP), clindamycin (DA), erythromycin (E), and tetracycline (T), signifying their multi-drug resistance traits. A cluster of phylogenetic analysis described that 80.7% and 15.8% of total isolates belonged to Staphylococcus aureus protein A (spa) type t002 and t548. Whereas 3.5% were reflected as a new spa type. Additionally, as per the chi-squared test score value, these two spa types (t002 and t548) have a distribution correlation with HA-MRSA and LA-MRSA in all the samples (p < 0.005, chi-squared test; degree of freedom = 1). Ultimately, this study highlights the prevalence of MRSA colonization in the conventional poultry farm environment, showing the risk of bioaerosol transmission, which needs epidemiological attention and prevention strategies.
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Affiliation(s)
- Chi-Wei Tao
- Department of Internal Medicine, Cheng Hsin General Hospital, Taipei 112401, Taiwan;
- Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Hsinchu 611310, Taiwan
| | - Jung-Sheng Chen
- Department of Medical Research, E-Da Hospital, Kaohsiung 824005, Taiwan;
| | - Bing-Mu Hsu
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi 621301, Taiwan;
- Correspondence: ; Tel.: +886-5272-0411 (ext. 66218)
| | - Suprokash Koner
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi 621301, Taiwan;
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 621301, Taiwan
| | - Tung-Che Hung
- Department of Infectious Diseases, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600566, Taiwan;
| | - Han-Ming Wu
- Family Medicine Department, Asia University Hospital, Taichung 413505, Taiwan;
| | - Jagat Rathod
- Department of Earth Sciences, National Cheng Kung University, Tainan 701401, Taiwan;
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37
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Hassan M, Shafique F, Bhutta H, Haq K, Almansouri T, Asim N, Khan D, Butt S, Ali N, Akbar N. A comparative study to evaluate the effects of antibiotics, plant extracts and fluoride-based toothpaste on the oral pathogens isolated from patients with gum diseases in Pakistan. BRAZ J BIOL 2021; 83:e242703. [PMID: 34320048 DOI: 10.1590/1519-6984.242703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 12/30/2020] [Indexed: 11/22/2022] Open
Abstract
Oral diseases caused by various microorganisms are common around the world. Scientific research has now been focusing on novel medicines to overcome bacterial resistance and antibiotics side effects; therefore, the current study was designed to assess the efficacy of certain antibiotics, toothpaste, and medicinal plant extracts (Ajuga bracteosa and Curcuma longa) versus the bacterial pathogens isolated from the human oral cavity. A total of 130 samples were collected from Khyber Teaching Hospital Peshawar, Pakistan, among those 27 species isolated, and eight bacterial species were identified from the samples. Among all the bacterial species, Staphylococcus aureus (29.62%) and Proteus mirabilis (22.2%) were found to be more prevalent oral pathogens. In comparison, the least pervasive microbes were Proteus vulgaris, Shigella sonnei, Escherichia coli and Aeromonas hydrophila. The study also suggested that dental problems were more prevalent in males (41-50 years of age) than females. Among the eight antibiotics used in the study, the most promising results were shown by Foxicillin against A. hydrophila. The survey of TP1 revealed that it showed more potent antagonist activity against Proteus vulgaris as compared TP2 and TP3 that might be due to the high content of fluoride. The Curcuma longa showed more significant activity than Ajuga bracteosa (Stem, leaves and root) extracts. The data obtained through this study revealed that antibiotics were more effective for oral bacterial pathogens than toothpaste and plant extracts which showed moderate and low activity, respectively. Therefore, it is suggested that the active compounds in individual medicinal plants like Curcuma longa and Ajuga bracteosa could replace the antibiotics when used in daily routine as tooth cleansers or mouth rinses.
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Affiliation(s)
- M Hassan
- Shaheed Benazir Bhutto Women University, Department of Microbiology, Peshawar, Pakistan.,University of Sheffield, Department of Molecular Biology and Biotechnology, Sheffield, UK
| | - F Shafique
- University of Sheffield, Department of Biomedical Science, Sheffield, UK
| | - H Bhutta
- Ajman University, Department of Dentistry, Ajman, UAE
| | - K Haq
- NCS University System, Department of Health Sciences, Peshawar, Pakistan
| | - T Almansouri
- University of Sheffield, Department of Neuroscience - SITraN, Sheffield, UK.,King Abdul Aziz University, Department of Applied Medical Science (Medical Laboratory), Jeddah, Saudi Arabia
| | - N Asim
- University of Agriculture, Institute of Biotechnology and Genetic Engineering, Division of Genomics and Bioinformatics, Peshawar, Pakistan
| | - D Khan
- De'Montmorency College of Dentistry Lahore, Punjab, Pakistan
| | - S Butt
- Shaheed Benazir Bhutto Women University, Department of Microbiology, Peshawar, Pakistan
| | - N Ali
- Abbottabad University of Science and Technology, Department of Microbiology, Abbottabad, Pakistan
| | - N Akbar
- Hazara University Mansehra, Department of Biotechnology and Genetic Engineering , Hazara, Pakistan
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38
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Badrick TC, Nusem I, Heney C, Sehu M. Granulicatella adiacens: An uncommon diagnosis of prosthetic hip joint infection. A case report with review of the literature. IDCases 2021; 25:e01204. [PMID: 34258223 PMCID: PMC8255243 DOI: 10.1016/j.idcr.2021.e01204] [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: 10/31/2020] [Revised: 06/21/2021] [Accepted: 06/21/2021] [Indexed: 11/30/2022] Open
Abstract
Prosthetic hip infection caused by Granulicatella adiacens. Diagnosis was achieved using broad range 16S PCR gene analysis at an early stage, after joint aspiration and culture failed to yield a pathogen. Granulicatella adiacens is a nutritionally variant streptococcus (NVS). Staged revision surgery together with administration of appropriate antibiotics resulted in cure. Diagnosis challenging, and often delays appropriate antibiotic administration.
We report a case of prosthetic hip infection in a 79 year old man caused by Granulicatella adiacens. The diagnosis was achieved using broad range 16S PCR gene analysis at an early stage, after joint aspiration and culture failed to yield a pathogen. Staged revision surgery together with administration of appropriate antibiotics resulted in cure. Granulicatella adiacens is a nutritionally variant streptococcus (NVS). It has been increasingly reported to cause significant morbidities involving various systems. Its insidious growth due to complex growth requirements, has made its diagnosis challenging, and often delays appropriate antibiotic administration.
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Affiliation(s)
- Timothy C Badrick
- Princess Alexandra Hospital, Queensland Health, Queensland, Australia.,University of Queensland, Queensland, Australia
| | - Iulian Nusem
- Logan Hospital, Queensland Health, Queensland, Australia
| | - Claire Heney
- Queensland Pathology, Queensland Health, Australia
| | - Marjoree Sehu
- Princess Alexandra Hospital, Queensland Health, Queensland, Australia.,Queensland Pathology, Queensland Health, Australia.,University of Queensland, Queensland, Australia
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Tenhagen BA, Flor M, Alt K, Knüver MT, Buhler C, Käsbohrer A, Stingl K. Association of Antimicrobial Resistance in Campylobacter spp. in Broilers and Turkeys with Antimicrobial Use. Antibiotics (Basel) 2021; 10:antibiotics10060673. [PMID: 34199987 PMCID: PMC8227418 DOI: 10.3390/antibiotics10060673] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/27/2021] [Accepted: 05/29/2021] [Indexed: 11/16/2022] Open
Abstract
We investigated trends in antimicrobial resistance (AMR) in Campylobacter jejuni and Campylobacter coli in poultry between 2010 and 2016 in Germany and their association with antimicrobial use. Campylobacter had been isolated from the caeca of broilers and turkeys at slaughter by regional laboratories according to current ISO methods in the framework of a national monitoring program. Isolates were submitted to the National Reference Laboratory for Campylobacter and tested for AMR using broth microdilution methods. Minimum inhibitory concentrations were evaluated according to epidemiological cut-off values. Antimicrobial use (AMU) data from 2014 to 2016 were taken from a government report. AMR was higher in C. coli than in C. jejuni and higher in turkeys than in broilers. AMR was highest to tetracycline and the tested (fluoro)quinolones while it was rare to gentamicin in both bacterial species, infrequent to erythromycin in C. jejuni, and moderate in C. coli. AMR to tetracycline and erythromycin decreased over time while it increased to (fluoro)quinolones. An association of AMU and AMR was observed for resistance to tetracycline and erythromycin, while it was not observed for the aminoglycosides. Resistance to nalidixic acid and ciprofloxacin increased despite a decrease of fluoroquinolone use between 2014 and 2016, indicating that other factors have a strong influence on resistance to (fluoro)quinolones in Campylobacter.
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Affiliation(s)
- Bernd-Alois Tenhagen
- Unit Epidemiology, Zoonoses and Antimicrobial Resistance, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8–10, 10589 Berlin, Germany; (M.F.); (K.A.); (A.K.)
- Correspondence: ; Tel.: +49-301841224301
| | - Matthias Flor
- Unit Epidemiology, Zoonoses and Antimicrobial Resistance, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8–10, 10589 Berlin, Germany; (M.F.); (K.A.); (A.K.)
| | - Katja Alt
- Unit Epidemiology, Zoonoses and Antimicrobial Resistance, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8–10, 10589 Berlin, Germany; (M.F.); (K.A.); (A.K.)
| | - Marie-Theres Knüver
- Unit Food Microbiology, Pathogen-Host Interactions, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8–10, 10589 Berlin, Germany; (M.-T.K.); (C.B.); (K.S.)
| | - Christiane Buhler
- Unit Food Microbiology, Pathogen-Host Interactions, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8–10, 10589 Berlin, Germany; (M.-T.K.); (C.B.); (K.S.)
| | - Annemarie Käsbohrer
- Unit Epidemiology, Zoonoses and Antimicrobial Resistance, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8–10, 10589 Berlin, Germany; (M.F.); (K.A.); (A.K.)
| | - Kerstin Stingl
- Unit Food Microbiology, Pathogen-Host Interactions, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8–10, 10589 Berlin, Germany; (M.-T.K.); (C.B.); (K.S.)
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40
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Sahoo SK, Rani B, Gaikwad NB, Ahmad MN, Kaul G, Shukla M, Nanduri S, Dasgupta A, Chopra S, Yaddanapudi VM. Synthesis and structure-activity relationship of new chalcone linked 5-phenyl-3-isoxazolecarboxylic acid methyl esters potentially active against drug resistant Mycobacterium tuberculosis. Eur J Med Chem 2021; 222:113580. [PMID: 34116324 DOI: 10.1016/j.ejmech.2021.113580] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/13/2021] [Accepted: 05/24/2021] [Indexed: 01/06/2023]
Abstract
In search of novel therapeutic agents active against emerging drug-resistant Mycobacterium tuberculosis and to counter the long treatment protocol of existing drugs, herein we present synthesis and biological evaluation of a new series of 5-phenyl-3-isoxazolecarboxylic acid methyl ester-chalcone hybrids. Among 35 synthesized compounds, 32 analogues displayed potent in-vitro activity against Mycobacterium tuberculosis H37Rv with MIC 0.12-16 μg/mL. Cell viability test against Vero cells indicated 29 compounds to be non-cytotoxic (CC50 > 20 μg/mL & SI > 10). Most potent compounds with MIC 0.12 μg/mL (7 b, 7j, 7 ab) exhibited selectivity index (SI) in excess of 320. Further studies on activity against drug-resistant Mycobacterium tuberculosis revealed 7j as the most potent compound with MIC 0.03-0.5 μg/mL. Time-kill kinetic study suggested compound 7j displaying concentration-dependent bactericidal killing activity with relatively comparable potency to that of current first-line anti-TB drugs. Taken together, 7j presents a novel hit with potential to be translated into a potent antimycobacterial.
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Affiliation(s)
- Santosh Kumar Sahoo
- Department of Pharmaceutical Technology and Process Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, Telangana, India
| | - Bandela Rani
- Department of Pharmaceutical Technology and Process Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, Telangana, India
| | - Nikhil Baliram Gaikwad
- Department of Pharmaceutical Technology and Process Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, Telangana, India
| | - Mohammad Naiyaz Ahmad
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Manjulika Shukla
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Srinivas Nanduri
- Department of Pharmaceutical Technology and Process Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, Telangana, India
| | - Arunava Dasgupta
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Venkata Madhavi Yaddanapudi
- Department of Pharmaceutical Technology and Process Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, 500037, Telangana, India.
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Structure based design, synthesis and evaluation of new thienopyrimidine derivatives as anti-bacterial agents. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130168] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Colistin Resistance in Aeromonas spp. Int J Mol Sci 2021; 22:ijms22115974. [PMID: 34205867 PMCID: PMC8199210 DOI: 10.3390/ijms22115974] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/26/2021] [Accepted: 05/26/2021] [Indexed: 12/22/2022] Open
Abstract
The increase in the use of antimicrobials such as colistin for the treatment of infectious diseases has led to the appearance of Aeromonas strains resistant to this drug. However, resistance to colistin not only occurs in the clinical area but has also been determined in Aeromonas isolates from the environment or animals, which has been determined by the detection of mcr genes that confer a resistance mechanism to colistin. The variants mcr-1, mcr-3, and mcr-5 have been detected in the genus Aeromonas in animal, environmental, and human fluids samples. In this article, an overview of the resistance to colistin in Aeromonas is shown, as well as the generalities of this molecule and the recommended methods to determine colistin resistance to be used in some of the genus Aeromonas.
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Sánchez-Gutiérrez M, Bascón-Villegas I, Rodríguez A, Pérez-Rodríguez F, Fernández-Prior Á, Rosal A, Carrasco E. Valorisation of Olea europaea L. Olive Leaves through the Evaluation of Their Extracts: Antioxidant and Antimicrobial Activity. Foods 2021; 10:966. [PMID: 33925051 PMCID: PMC8145053 DOI: 10.3390/foods10050966] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 04/22/2021] [Accepted: 04/24/2021] [Indexed: 12/15/2022] Open
Abstract
Olea europaea L. leaves constitute a source of bioactive compounds with recognized benefits for both human health and technological purposes. In the present work, different extracts from olive leaves were obtained by the application of two extraction methods, Soxhlet and microwave-assisted extraction (MAE), and six solvents (distilled water, ethanolic and glycerol mixtures solvents). MAE was applied under 40, 60 and 80 °C for 3, 6.5 and 10 min. The effect of the extraction method, solvent and treatment factors (the latter in MAE) on the total phenol content (TPC), the antioxidant activity (AA) and the phenolic profile of the extracts were all evaluated. The extracts showed high values of TPC (up to 76.1 mg GAE/g DW) and AA (up to 78 mg TE/g DW), with oleuropein being the most predominant compound in all extracts. The Soxhlet extraction method exhibited better yields in TPC than in MAE, although both methods presented comparable AA values. The water MAE extract presented the strongest antimicrobial activity against five foodborne pathogens, with minimum inhibitory concentration (MIC) values ranging from 2.5 to 60 mg/mL. MAE water extract is proposed to be exploited in the food and nutraceutical industry in the frame of a sustainable economy.
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Affiliation(s)
- Mónica Sánchez-Gutiérrez
- Food Science and Technology Department, Universidad de Córdoba, Darwin Building, 14014 Córdoba, Spain; (I.B.-V.); (F.P.-R.); (E.C.)
- BioPrEn Group, Chemical Engineering Department, Universidad de Córdoba, Marie-Curie Building, 14014 Córdoba, Spain;
| | - Isabel Bascón-Villegas
- Food Science and Technology Department, Universidad de Córdoba, Darwin Building, 14014 Córdoba, Spain; (I.B.-V.); (F.P.-R.); (E.C.)
- BioPrEn Group, Chemical Engineering Department, Universidad de Córdoba, Marie-Curie Building, 14014 Córdoba, Spain;
| | - Alejandro Rodríguez
- BioPrEn Group, Chemical Engineering Department, Universidad de Córdoba, Marie-Curie Building, 14014 Córdoba, Spain;
| | - Fernando Pérez-Rodríguez
- Food Science and Technology Department, Universidad de Córdoba, Darwin Building, 14014 Córdoba, Spain; (I.B.-V.); (F.P.-R.); (E.C.)
| | - África Fernández-Prior
- Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera, km. 1, 41013 Seville, Spain;
| | - Antonio Rosal
- Molecular Biology and Biochemical Engineering Department, Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera, km. 1, 41013 Seville, Spain;
| | - Elena Carrasco
- Food Science and Technology Department, Universidad de Córdoba, Darwin Building, 14014 Córdoba, Spain; (I.B.-V.); (F.P.-R.); (E.C.)
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Haessler S, Lindenauer PK, Zilberberg MD, Imrey PB, Yu PC, Higgins T, Deshpande A, Rothberg MB. Blood Cultures Versus Respiratory Cultures: 2 Different Views of Pneumonia. Clin Infect Dis 2021; 71:1604-1612. [PMID: 31665249 DOI: 10.1093/cid/ciz1049] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 10/25/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Choice of empiric therapy for pneumonia depends on risk for antimicrobial resistance. Models to predict resistance are derived from blood and respiratory culture results. We compared these results to understand if organisms and resistance patterns differed by site. We also compared characteristics and outcomes of patients with positive cultures by site. METHODS We studied adult patients discharged from 177 US hospitals from July 2010 through June 2015, with principal diagnoses of pneumonia, or principal diagnoses of respiratory failure, acute respiratory distress syndrome, respiratory arrest, or sepsis with a secondary diagnosis of pneumonia, and who had blood or respiratory cultures performed. Demographics, treatment, microbiologic results, and outcomes were examined. RESULTS Among 138 561 hospitalizations of patients with pneumonia who had blood or respiratory cultures obtained at admission, 12 888 (9.3%) yielded positive cultures: 6438 respiratory cultures, 5992 blood cultures, and 458 both respiratory and blood cultures. Forty-two percent had isolates resistant to first-line therapy for community-acquired pneumonia. Isolates from respiratory samples were more often resistant than were isolates from blood (54.2% vs 26.6%; P < .001). Patients with both culture sites positive had higher case-fatality, longer lengths of stay, and higher costs than patients who had only blood or respiratory cultures positive. Among respiratory cultures, the most common pathogens were Staphylococcus aureus (34%) and Pseudomonas aeruginosa (17%), whereas blood cultures most commonly grew Streptococcus pneumoniae (33%), followed by S. aureus (22%). CONCLUSIONS Patients with positive respiratory tract cultures are clinically different from those with positive blood cultures, and resistance patterns differ by source. Models of antibiotic resistance should account for culture source.
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Affiliation(s)
- Sarah Haessler
- Division of Infectious Diseases, University of Massachusetts Medical School-Baystate, Springfield, Massachusetts, USA
| | - Peter K Lindenauer
- Institute for Healthcare Delivery and Population Science and Department of Medicine, University of Massachusetts Medical School-Baystate, Springfield, Massachusetts, USA.,Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Marya D Zilberberg
- EviMed Research Group, LLC, Goshen, Massachusetts, USA.,Division of Pulmonary and Critical Medicine, University of Massachusetts School of Public Health and Health Sciences, Amherst, Massachusetts, USA
| | - Peter B Imrey
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio, USA.,Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Pei-Chun Yu
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio, USA
| | - Tom Higgins
- Center for Case Management, Natick, Massachusetts, USA
| | - Abhishek Deshpande
- Medicine Institute Center for Value Based Care Research, Medicine Institute, Cleveland Clinic, Cleveland, Ohio, USA.,Department of Infectious Diseases, Cleveland Clinic, Cleveland, Ohio, USA
| | - Michael B Rothberg
- Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.,Medicine Institute Center for Value Based Care Research, Medicine Institute, Cleveland Clinic, Cleveland, Ohio, USA
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Kwiecień E, Stefańska I, Chrobak-Chmiel D, Kizerwetter-Świda M, Moroz A, Olech W, Spinu M, Binek M, Rzewuska M. Trueperella pyogenes Isolates from Livestock and European Bison ( Bison bonasus) as a Reservoir of Tetracycline Resistance Determinants. Antibiotics (Basel) 2021; 10:380. [PMID: 33916765 PMCID: PMC8065510 DOI: 10.3390/antibiotics10040380] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/30/2021] [Accepted: 03/31/2021] [Indexed: 12/16/2022] Open
Abstract
Determinants of tetracycline resistance in Trueperella pyogenes are still poorly known. In this study, resistance to tetracycline was investigated in 114 T. pyogenes isolates from livestock and European bison. Tetracycline minimum inhibitory concentration (MIC) was evaluated by a microdilution method, and tetracycline resistance genes were detected by PCR. To determine variants of tetW and their linkage with mobile elements, sequencing analysis was performed. Among the studied isolates, 43.0% were tetracycline resistant (MIC ≥ 8 µg/mL). The highest MIC90 of tetracycline (32 µg/mL) was noted in bovine and European bison isolates. The most prevalent determinant of tetracycline resistance was tetW (in 40.4% of isolates), while tetA(33) was detected only in 8.8% of isolates. Four variants of tetW (tetW-1, tetW-2, tetW-3, tetW-4) were recognized. The tetW-3 variant was the most frequent and was linked to the ATE-1 transposon. The tetW-2 variant, found in a swine isolate, was not previously reported in T. pyogenes. This is the first report on determinants of tetracycline resistance in T. pyogenes isolates from European bison. These findings highlight that wild animals, including wild ruminants not treated with antimicrobials, can be a reservoir of tetracycline-resistant bacteria carrying resistance determinants, which may be easily spread among pathogenic and environmental microorganisms.
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Affiliation(s)
- Ewelina Kwiecień
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland; (I.S.); (D.C.-C.); (M.K.-Ś.); (M.B.)
| | - Ilona Stefańska
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland; (I.S.); (D.C.-C.); (M.K.-Ś.); (M.B.)
| | - Dorota Chrobak-Chmiel
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland; (I.S.); (D.C.-C.); (M.K.-Ś.); (M.B.)
| | - Magdalena Kizerwetter-Świda
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland; (I.S.); (D.C.-C.); (M.K.-Ś.); (M.B.)
| | - Agata Moroz
- Division of Veterinary Epidemiology and Economics, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Nowoursynowska 159c St., 02-786 Warsaw, Poland;
| | - Wanda Olech
- Department of Animal Genetics and Conservation, Institute of Animal Sciences, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland;
| | - Marina Spinu
- Department of Infectious Diseases and Preventive Medicine, Law and Ethics, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăștur 3-5, 400372 Cluj-Napoca, Romania;
| | - Marian Binek
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland; (I.S.); (D.C.-C.); (M.K.-Ś.); (M.B.)
| | - Magdalena Rzewuska
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland; (I.S.); (D.C.-C.); (M.K.-Ś.); (M.B.)
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Yeung EYH. Granulicatella Infection of the Central Nervous System in a 3-Year-Old Girl. Can J Hosp Pharm 2021; 74:159-162. [PMID: 33896957 PMCID: PMC8042192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Eugene Y H Yeung
- , MD, MSc, ACPR, BSc(Pharm), is with the Faculty of Medicine, University of Ottawa, and the Eastern Ontario Regional Laboratory Association, Ottawa, Ontario
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47
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Gaikwad NB, Afroz P, Ahmad MN, Kaul G, Shukla M, Nanduri S, Dasgupta A, Chopra S, Yaddanapudi VM. Design, synthesis, in vitro and in silico evaluation of new 3-phenyl-4,5-dihydroisoxazole-5-carboxamides active against drug-resistant mycobacterium tuberculosis. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Role of Antimicrobial Susceptibility Testing before First-Line Treatment Containing Clarithromycin for Helicobacter pylori Eradication in the Clinical Setting. Antibiotics (Basel) 2021; 10:antibiotics10020214. [PMID: 33669969 PMCID: PMC7924850 DOI: 10.3390/antibiotics10020214] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/14/2021] [Accepted: 02/18/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Checking Helicobacter pylori susceptibility tests in the clinical setting before first-line treatment is considered difficult. We compared susceptibility-guided therapy (SGT) with empirical therapy (ET) as a first-line treatment containing clarithromycin and investigated the eradication rate using antimicrobial susceptibility testing (AST). METHODS 257 patients with H. pylori infection, with AST, performed before the eradication of clarithromycin-containing regimens were enrolled and divided into two groups: the SGT and ET groups. RESULTS Eradication rates in the SGT and ET groups were 85.4% and 58.4% (P < 0.01), respectively. In triple therapy (TT), eradication rates of the SGT and ET groups were 85.1% and 56.6% (P < 0.01), respectively. In sequential therapy (SET), eradication rates of the SGT and ET groups were 86.2% and 65.6% (P = 0.06), respectively. According to AST, TT had an eradication rate of 84.6% with strains susceptible to clarithromycin and amoxicillin and 11.1% with strains resistant to both. SET had an eradication rate of 89.5% with strains susceptible to clarithromycin, amoxicillin, and metronidazole, whereas it was 0% with strains resistant to clarithromycin and metronidazole. CONCLUSIONS SGT as first-line treatment improved eradication rates of TT and SET by 28.5 (P < 0.01) and 20.6 (P = 0.06) percent points, respectively, compared with ET.
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Noh HJ, Lim HR, Koh JW. The Status of Infectious Keratitis in Gwang-ju, Jeonnam, Republic of Korea. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2021. [DOI: 10.3341/jkos.2021.62.2.173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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Multiple drug resistance of Campylobacter jejuni and Shigella isolated from diarrhoeic children at Kapsabet County referral hospital, Kenya. BMC Infect Dis 2021; 21:109. [PMID: 33485326 PMCID: PMC7825205 DOI: 10.1186/s12879-021-05788-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 01/11/2021] [Indexed: 11/24/2022] Open
Abstract
Background Diarrhoea is a common cause of mortality and morbidity in children under five years old. In Kenya, it has a 21% case fatality with Enteropathogenic E. coli, Campylobacter jejuni, Shigella spp. and Salmonella spp. accounting for 50–60% of the cases. Sulphonamides, tetracycline, ampicillin and trimethoprim/sulfamethoxazole are typically used in the treatment of diarrhoeal diseases but have become ineffective in the face of emerging antimicrobial resistance. The objective of this study was to evaluate the prevalence and antimicrobial susceptibility of Campylobacter jejuni and Shigella species in children under five years of age presenting with diarrhoea at Kapsabet County Referral Hospital in Kenya. Methods Faecal samples were collected from 139 children admitted with diarrhoea. Each sample was examined macroscopically for colour, texture, and presence of extraneous material. The samples were then cultured for bacterial growth. Observed bacterial growth was isolated and identified by a series of biochemical tests. Resistance patterns were also evaluated using the Kirby – Bauer Disk diffusion method. The chi – square test and Pearson Correlation Coefficient were used to establish statistical significance. Results Approximately 33.1% of the total faecal samples tested were positive for enteric pathogens. Shigella spp. demonstrated resistance to erythromycin (91.7%), doxycyclin (83.3%), ampicillin (82.1%), cotrimoxazole (73.1%), minocycline (66.7%) and cefuroxime (54.2%). Campylobacter jejuni also exhibited resistance to erythromycin (87.5%), doxycyclin (75%), ampicillin (73.7%), cotrimoxazole (73.3%) and minocycline (68.8%). Conclusions The resistance patterns of Shigella spp. and Campylobacter jejuni reported in this study necessitates the need for a comprehensive multiregional investigation to evaluate the geographical prevalence and antimicrobial resistance distributions of these microorganisms. These findings also support the need for the discovery and development of effective therapeutic alternatives. Trial registration Retrospectively registered. Certificate No. 00762
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