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Authors = Ramesh Nachimuthu

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8 pages, 529 KiB  
Article
The Emergence of Carbapenem-Resistant Gram-Negative Bacteria in Mizoram, Northeast India
by Vanlalruati S. C. Ralte, Archana Loganathan, Prasanth Manohar, Christine Vanlalbiakdiki Sailo, Zothan Sanga, Lalremruata Ralte, John Zothanzama, Sebastian Leptihn, Ramesh Nachimuthu and Nachimuthu Senthil Kumar
Microbiol. Res. 2022, 13(3), 342-349; https://doi.org/10.3390/microbiolres13030027 - 22 Jun 2022
Cited by 9 | Viewed by 5141
Abstract
(Background) Numerous reports on carbapenem resistance in different parts of India have been published, yet there are insufficient studies on the prevalence of antibiotic resistance in the northeast region of the country. This study evaluated the emergence of carbapenem resistance in the clinical [...] Read more.
(Background) Numerous reports on carbapenem resistance in different parts of India have been published, yet there are insufficient studies on the prevalence of antibiotic resistance in the northeast region of the country. This study evaluated the emergence of carbapenem resistance in the clinical isolates collected in Mizoram. (Results) A total of 141 Gram-negative clinical isolates were collected from the two hospitals, including the Civil Hospital in Lunglei and the Synod Hospital in Aizawl. The isolates include Escherichia coli (n = 62, 43.9%), Klebsiella spp. (n = 43, 30.4%), Pseudomonas aeruginosa (n = 9, 6.3%), Serratia marcescens (n = 3, 2.1%), Proteus mirabilis (n = 2, 1.4%), Shigella spp. (n = 4, 2.8%), Enterobacter spp. (n = 6, 4.2%) and Acinetobacter spp. (n = 12, 8.5%). The isolates were found to be resistant to meropenem (11%), colistin (48%), tigecycline (25%) and cefotaxime (50%). A total of four E. coli and one Shigella sonnei encoded the blaOXA-48-like gene. The blaCTX-M-1 gene was detected in 13 isolates, of which eight were E. coli, two Shigella flexneri, and one isolates each of K. pneumoniae, K. oxytoca and Shigella sonnei, respectively. (Conclusion) Carbapenem-resistant Enterobacteriaceae are common among other parts of India, despite limited access to antibiotics, the emergence of resistance in the northeastern region is worrying. Full article
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25 pages, 1145 KiB  
Review
The Role of Antimicrobial Peptides as Antimicrobial and Antibiofilm Agents in Tackling the Silent Pandemic of Antimicrobial Resistance
by Bruno S. Lopes, Alfizah Hanafiah, Ramesh Nachimuthu, Saravanan Muthupandian, Zarith Nameyrra Md Nesran and Sandip Patil
Molecules 2022, 27(9), 2995; https://doi.org/10.3390/molecules27092995 - 6 May 2022
Cited by 42 | Viewed by 7649
Abstract
Just over a million people died globally in 2019 due to antibiotic resistance caused by ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species). The World Health Organization (WHO) also lists [...] Read more.
Just over a million people died globally in 2019 due to antibiotic resistance caused by ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species). The World Health Organization (WHO) also lists antibiotic-resistant Campylobacter and Helicobacter as bacteria that pose the greatest threat to human health. As it is becoming increasingly difficult to discover new antibiotics, new alternatives are needed to solve the crisis of antimicrobial resistance (AMR). Bacteria commonly found in complex communities enclosed within self-produced matrices called biofilms are difficult to eradicate and develop increased stress and antimicrobial tolerance. This review summarises the role of antimicrobial peptides (AMPs) in combating the silent pandemic of AMR and their application in clinical medicine, focusing on both the advantages and disadvantages of AMPs as antibiofilm agents. It is known that many AMPs display broad-spectrum antimicrobial activities, but in a variety of organisms AMPs are not stable (short half-life) or have some toxic side effects. Hence, it is also important to develop new AMP analogues for their potential use as drug candidates. The use of one health approach along with developing novel therapies using phages and breakthroughs in novel antimicrobial peptide synthesis can help us in tackling the problem of AMR. Full article
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17 pages, 1818 KiB  
Communication
Characteristics of a Nationwide Voluntary Antibiotic Resistance Awareness Campaign in India; Future Paths and Pointers for Resource Limited Settings/Low and Middle Income Countries
by Ashok J. Tamhankar, Ramesh Nachimuthu, Ravikant Singh, Jyoti Harindran, Gautam Kumar Meghwanshi, Rajesh Kannan, Nachimuthu Senthil Kumar, Vikrant Negi, Lijy Jacob, Sayan Bhattacharyya, Krushna Chandra Sahoo, Vijay Kumar Mahadik, Vishal Diwan, Megha Sharma, Ashish Pathak, Smita U. Khedkar, Dnyaneshwar Avhad, Sonal Saxena, Sandeep Nerkar, Vaishali Venu, Sandeep Kumar, G. Shandeepan, Khundrakpam Ranjit Singh, Ridiamma Gashnga and Arvind Kumaradd Show full author list remove Hide full author list
Int. J. Environ. Res. Public Health 2019, 16(24), 5141; https://doi.org/10.3390/ijerph16245141 - 16 Dec 2019
Cited by 7 | Viewed by 5432
Abstract
Antibiotic resistance has reached alarming proportions globally, prompting the World Health Organization to advise nations to take up antibiotic awareness campaigns. Several campaigns have been taken up worldwide, mostly by governments. The government of India asked manufacturers to append a ‘redline’ to packages [...] Read more.
Antibiotic resistance has reached alarming proportions globally, prompting the World Health Organization to advise nations to take up antibiotic awareness campaigns. Several campaigns have been taken up worldwide, mostly by governments. The government of India asked manufacturers to append a ‘redline’ to packages of antibiotics as identification marks and conducted a campaign to inform the general public about it and appropriate antibiotic use. We investigated whether an antibiotic resistance awareness campaign could be organized voluntarily in India and determined the characteristics of the voluntarily organized campaign by administering a questionnaire to the coordinators, who participated in organizing the voluntary campaign India. The campaign characteristics were: multiple electro–physical pedagogical and participatory techniques were used, 49 physical events were organized in various parts of India that included lectures, posters, booklet/pamphlet distribution, audio and video messages, competitions, and mass contact rallies along with broadcast of messages in 11 local languages using community radio stations (CRS) spread all over India. The median values for campaign events were: expenditure—3000 Indian Rupees/day (US$~47), time for planning—1 day, program spread—4 days, program time—4 h, direct and indirect reach of the message—respectively 250 and 500 persons/event. A 2 min play entitled ‘Take antibiotics as prescribed by the doctor’ was broadcast 10 times/day for 5 days on CRS with listener reach of ~5 million persons. More than 85%ofcoordinators thought that the campaign created adequate awareness about appropriate antibiotic use and antibiotic resistance. The voluntary campaign has implications for resource limited settings/low and middle income countries. Full article
(This article belongs to the Special Issue Toxicology and Public Health)
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25 pages, 2842 KiB  
Review
miRNA Predictors of Pancreatic Cancer Chemotherapeutic Response: A Systematic Review and Meta-Analysis
by Madhav Madurantakam Royam, Rithika Ramesh, Ritika Shanker, Shanthi Sabarimurugan, Chellan Kumarasamy, Nachimuthu Ramesh, Kodiveri Muthukalianan Gothandam, Siddharta Baxi, Ajay Gupta, Sunil Krishnan and Rama Jayaraj
Cancers 2019, 11(7), 900; https://doi.org/10.3390/cancers11070900 - 27 Jun 2019
Cited by 26 | Viewed by 5299
Abstract
Background: pancreatic cancer (PC) has increasing incidence and mortality in developing countries, and drug resistance is a significant hindrance to the efficacy of successful treatment. The objective of this systematic review and meta-analysis was to evaluate the association between miRNAs and response to [...] Read more.
Background: pancreatic cancer (PC) has increasing incidence and mortality in developing countries, and drug resistance is a significant hindrance to the efficacy of successful treatment. The objective of this systematic review and meta-analysis was to evaluate the association between miRNAs and response to chemotherapy in pancreatic cancer patients. Methods: the systematic review and meta-analysis was based on articles collected from a thorough search of PubMed and Science Direct databases for publications spanning from January 2008 to December 2018. The articles were screened via a set of inclusion and exclusion criteria based on the preferred reporting items for systematic review and meta-analysis (PRISMA) guidelines. Data was extracted, collated and tabulated in MS Excel for further synthesis. Hazard ratio (HR) was selected as the effect size metric to be pooled across studies for the meta-analysis, with the random effects model being applied. Subgroup analysis was also conducted, and the presence of publication bias in the selected studies was assessed. Publication bias of the included studies was quantified. Findings: of the 169 articles screened, 43 studies were included in our systematic review and 13 articles were included in the meta-analysis. Gemcitabine was observed to be the principal drug used in a majority of the studies. A total of 48 miRNAs have been studied, and 18 were observed to have possible contributions to chemoresistance, while 15 were observed to have possible contributions to chemosensitivity. 41 drug-related genetic pathways have been identified, through which the highlighted miRNA may be affecting chemosensitivity/resistance. The pooled HR value for overall survival was 1.603; (95% Confidence Interval (CI) 1.2–2.143; p-value: 0.01), with the subgroup analysis for miR-21 showing HR for resistance of 2.061; 95% CI 1.195–3.556; p-value: 0.09. Interpretation: our results highlight multiple miRNAs that have possible associations with modulation of chemotherapy response in pancreatic cancer patients. Further studies are needed to discover the molecular mechanisms underlying these associations before they can be suggested for use as biomarkers of response to chemotherapeutic interventions in pancreatic cancer. Full article
(This article belongs to the Special Issue New Biomarkers in Cancers)
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