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Soku YK, Mohamed A, Samuel T, Dessai U, Walls I, Rockwell C, Fortenberry G, Berutti T, Nieves-Miranda S, Nawrocki EM, Fu Y, Dudley E, Mamber SW, Hicks J. Corrigendum to "A Comparative Study on Antimicrobial Resistance in Escherichia coli Isolated from Channel Catfish and Related Freshwater Fish Species" [J. Food Protect. 87(1) (2023) 100192]. J Food Prot 2024; 87:100225. [PMID: 38383072 DOI: 10.1016/j.jfp.2024.100225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
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Soku YK, Mohamed A, Samuel T, Dessai U, Walls I, Rockwell C, Fortenberry G, Berutti T, Nieves-Miranda S, Nawrocki EM, Fu Y, Dudley E, Mamber SW, Hicks J. A Comparative Study on Antimicrobial Resistance in Escherichia coli Isolated from Channel Catfish and Related Freshwater Fish Species. J Food Prot 2024; 87:100192. [PMID: 37949412 DOI: 10.1016/j.jfp.2023.100192] [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: 07/24/2023] [Revised: 10/31/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023]
Abstract
Antimicrobial resistance (AMR) trends in 114 generic Escherichia coli isolated from channel catfish and related fish species were investigated in this study. Of these, 45 isolates were from commercial-sized channel catfish harvested from fishponds in Alabama, while 69 isolates were from Siluriformes products, accessed from the U.S. Department of Agriculture Food Safety and Inspection Service' (FSIS) National Antimicrobial Resistance Monitoring System (NARMS) program. Antibiotic susceptibility testing and whole genome sequencing were performed using the GenomeTrakr protocol. Upon analysis, the fishpond isolates showed resistance to ampicillin (44%), meropenem (7%) and azithromycin (4%). The FSIS NARMS isolates showed resistance to tetracycline (31.9%), chloramphenicol (20.3%), sulfisoxazole (17.4%), ampicillin (5.8%) and trimethoprim-sulfamethoxazole, nalidixic acid, amoxicillin-clavulanic acid, azithromycin and cefoxitin below 5% each. There was no correlation between genotypic and phenotypic resistance in the fishpond isolates, however, there was in NARMS isolates for folate pathway antagonists: Sulfisoxazole vs. sul1 and sul2 (p = 0.0042 and p < 0.0001, respectively) and trimethoprim-sulfamethoxazole vs. dfrA16 and sul1 (p = 0.0290 and p = 0.013, respectively). Furthermore, correlations were found for tetracyclines: Tetracycline vs. tet(A) and tet(B) (p < 0.0001 each), macrolides: Azithromycin vs. mph(E) and msr(E) (p = 0.0145 each), phenicols: Chloramphenicol vs. mdtM (p < 0.0001), quinolones: Nalidixic acid vs. gyrA_S83L=POINT (p = 0.0004), and β-lactams: Ampicillin vs. blaTEM-1 (p < 0.0001). Overall, we recorded differences in antimicrobial susceptibility testing profiles, phenotypic-genotypic concordance, and resistance to critically important antimicrobials, which may be a public health concern.
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Willey-Courand D, Bui T, Dudley E, Coburn L, Flores D, Dorsett S, Vavrina K, Elliott A, Nieto A. 95 Increasing vitamin D levels and dual energy X-ray absorptiometry screening using a microsystems approach. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)00786-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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M’ikanatha NM, Yin X, Fu Y, Sayeed S, Carr C, Dettinger L, Hackman N, Dudley E, Tate H. 230. Nontyphoidal Salmonella from Clinical and Retail Meat Sources Reveal Antimicrobial Resistance Genes for Ceftriaxone and Ciprofloxacin. Open Forum Infect Dis 2021. [PMCID: PMC8645062 DOI: 10.1093/ofid/ofab466.432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background Pennsylvania participates in the National Antimicrobial Resistance Monitoring System (NARMS), which includes monitoring of Nontyphoidal Salmonella (NTS), a leading cause of bacterial foodborne illnesses in the United States. Methods Clinical NTS isolates submitted to the Pennsylvania Department of Health (2015-18) were tested for susceptibility to 15 antimicrobial agents and analyzed by whole-genome sequencing (WGS). Concurrently, we conducted a prospective microbiological survey of NTS in retail meat products (chicken breasts, ground turkey, and pork chops) with susceptibility testing and WGS. Results Of a sample of 426 clinical Salmonella isolates from humans analyzed for antimicrobial susceptibility, 65 (15.3%) had decreased susceptibility to ciprofloxacin (DSC). Ampicillin resistance was observed in 39 (9.2%) and 15 (3.5%) were ceftriaxone-resistant. Ten ceftriaxone-resistant isolates had genetic elements that confer resistance to third generation extended-spectrum cephalosporins (ESC) [blaCMY−2, n=8 and blaCTX-M-65, n=2]. The blaCTX-M-65- positive isolates had a mutation in gyrA that confers fluoroquinolone resistance. Thirteen clinical isolates carried plasmid-mediated fluoroquinolone resistance genes (PMQR) [qnrB19, qnrS1, qnrA1]. We detected NTS in 131 (3.8%) of 3480 meat samples tested. 7 (5.3%) had DSC, while 38 (29%) and 21 (16%) were resistant to ampicillin and ceftriaxone, respectively. Four S. Infantis isolates had DSC and a blaCTX-M-65 gene plus a mutation in gyrA. Thirteen meat isolates had the blaCMY-2 gene. One additional blaCTX-M-65-positive S. Infantis without gyrA from ground turkey (SRR6351119) differed from four clinical isolates by ≤10 single-nucleotide polymorphisms. Percent of isolates from patients and meat sources that demonstrated resistance to amoxicillin-clavulanate (AMC), ceftriaxone, and decreased susceptibility to ciprofloxacin (DSC) to nine antimicrobial classes tested. ![]()
Among isolates from patients, resistance to ceftriaxone, a third-generation cephalosporin preferred for severe infections in children, increased from zero in 2015 to 5.8% in 2017. Overall, DSC increased in isolates from human sources while in strains from meat sources, DSC increased from zero in 2015 to over five percent in 2018. Conclusion NTS isolated from human and meat sources were multi-drug resistant. Demonstration of similar resistance genes in meat and in ill humans may be consistent with spread of antibiotic-resistant pathogens from food sources. Dissemination of genes that confer resistance to third generation cephalosporins and fluoroquinolones, including some on mobile plasmids, may undermine recommended treatment for severe NTS infections. These results underscore the need for antimicrobial stewardship efforts in both agriculture and human medicine. Disclosures All Authors: No reported disclosures
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Abstract
Polymerase chain reaction (PCR) and sequencing-based subtyping tools are useful for rapid analyses of Salmonella isolates. Here we describe the process of clustered regularly interspaced short palindromic repeat-multiple virulence locus sequence typing (CRISPR-MVLST) for Salmonella subtyping.
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Swithenbank L, Cox P, Harris LG, Dudley E, Sinclair K, Lewis P, Cappiello F, Morgan C. Temporin A and Bombinin H2 Antimicrobial Peptides Exhibit Selective Cytotoxicity to Lung Cancer Cells. SCIENTIFICA 2020; 2020:3526286. [PMID: 32676212 PMCID: PMC7341413 DOI: 10.1155/2020/3526286] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/21/2020] [Accepted: 05/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Recently, antimicrobial peptides (AMPs) have been investigated for their use in cancer therapy. They have been reported to selectively target and kill cancer cells whilst leaving normal healthy cells unaffected. Certain Anura AMPs have expressed selective cytotoxicity against tumour cells. AIM To test the potential of Anura AMPs bombinin H2, bombinin H4, temporin A, and temporin L for use as therapeutic agents for non-small cell lung carcinoma (NSCLC). METHODS Cytotoxic effects on NSCLC cell lines A549 and Calu-3 and normal epithelial cell line Beas-2B were tested using the CellTox Green Cytotoxicity Assay. Their haemolytic effects on human erythrocytes were also tested for their clinical relevance. Cell membrane profiling, using MALDI-TOF, was performed to ascertain if membrane characteristics of the NSCLC and Beas-2B cell lines may contribute to the AMPs mode of action. RESULTS Bombinin H4 (100-1.5 μM, p < 0.05) and temporin A (100-50 μM, p < 0.05) showed selective cytotoxicity towards the NSCLC cell lines. Furthermore, they exhibited low levels of haemolytic activity (bombinin H4, 0.061%; temporin A, 0.874%) comparable to untreated cells. Cell membrane profiling showed the phospholipid composition of normal epithelial cell line Beas-2B to be divergent from the cancerous cell lines. However, there was an overlap in the phospholipid profiles of the NSCLC cell lines supporting the hypothesis that the AMPs may have a selective affinity via the membrane composition of cancerous cell lines. CONCLUSION These results suggest that bombinin H4 and temporin A show potential for application in lung cancer therapies. Further in vitro and in vivo studies are required to develop a greater understanding of their use as anticancer agents.
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Moody S, Bull J, Dudley E, Loveridge E. The impact of combinatorial stress on the growth dynamics and metabolome of
Burkholderia mesoacidophila
demonstrates the complexity of tolerance mechanisms. J Appl Microbiol 2019; 127:1521-1531. [DOI: 10.1111/jam.14404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 07/19/2019] [Accepted: 07/23/2019] [Indexed: 12/15/2022]
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Gazze SA, Hallin I, Quinn G, Dudley E, Matthews GP, Rees P, van Keulen G, Doerr SH, Francis LW. Organic matter identifies the nano-mechanical properties of native soil aggregates. NANOSCALE 2018; 10:520-525. [PMID: 29239448 DOI: 10.1039/c7nr07070e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Localized variations at the nanoscale in soil aggregates and in the spatial organisation of soil organic matter (SOM) are critical to understanding the factors involved in soil composition and turnover. However soil nanoscience has been hampered by the lack of suitable methods to determine soil biophysical properties at nanometre spatial resolution with minimal sample preparation. Here we introduce for the first time an Atomic Force Microscopy (AFM)-based Quantitative Nano-Mechanical mapping (QNM) approach that allows the characterisation of the role of SOM in controlling surface nano-mechanical properties of soil aggregates. SOM coverage resulted in an increased roughness and surface variability of soil, as well as in decreased stiffness and adhesive properties. The latter also correlates with nano- to macro-wettability features as determined by contact angle measurements and Water Drop Penetration Time (WDPT) testing. AFM thus represents an ideal quantitative tool to complement existing techniques within the emerging field of soil nanoscience.
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Dudley E. Book Review: Careering along with books: studies in the history of British public libraries and librarianship in honour of the 85th birthday of Dr William A. Munford. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100069702900215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E, Fisher B. Book Revieqw: Coaching in the library: A management strategy for achieving excellence. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Dudley E, Kumiega LU. Book Review: The library and information work primer, second edition. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E, Moran G. Book Review: Intellectual freedom manual, 6th edition. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Dudley E, Adam R. Book Review: Developing skills for the information services workforce in the knowledge economy: a report on the outcomes of eight scenario-planning workshops (LIC Research Report 122). JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400307] [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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Dudley E, Lovecy I. Book Review: The wired world: an introduction to the theory and practice of the information society. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400212] [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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Dudley E, Mcllwaine I. Book Reviews : Hamilton, Feona Current awareness, current techniques. 1 995, Aldershot: Gower xii, 175pp, £35.00, ISBN 0 566 07626 8. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100069602800206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Dudley E, Duffy A. Book Review: Managing information resources in libraries: collection management in theory and practice, Using the internet as a reference tool: a how-to-do-it manual for librarians. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400210] [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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Dudley E, Duckett B. Book Review: Oxford Reference Online. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E, Cornish GP. Book Reviews : Oppenheim, Charles The legal and regulatory environment for electronic information, second edition. 1995, Calne (Wiltshire): Infonortics Ltd, 132pp, £95.00, ISBN 1 873699 23 9. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100069602800307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E, Oppenheim C. Book Review: Evaluating networked information services. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E, Bunch AJ. Book Review: America’s library: the story of the Library of Congress, 1800-2000. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Dudley E. Book Reviews : Paris, Michael The novels of World War Two: an annotated bibliography of World War Two fiction. 1990, London: Library Association Publishing Ltd, xii, 184pp, £21.00, ISBN 0 85365 918 4. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100069102300107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E, Yeates R. Book Review: Information sources and searching on the World Wide Web, Managing electronic reserves, Usability testing for library web sites: A hands-on guide. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060203400208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E. Book Review: Review articles. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060303500106] [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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Dudley E, Line MB. Book Review: Statistical methods for the information professional: a practical, painless approach to understanding, using, and interpreting statistics. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060103300411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dudley E, Daines G. Book Review: LISU annual library statistics 2000: featuring trend analysis of UK public and academic libraries 1989-99. JOURNAL OF LIBRARIANSHIP AND INFORMATION SCIENCE 2016. [DOI: 10.1177/096100060103300407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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