LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 32

Search options

  1. Article ; Online: Evaluating preanalytical sample storage parameters for nucleic acid-based detection of

    Fernando, Janath A / Krysiak, Marcelina / Prestedge, Jacqueline / Azzato, Francesca / Williamson, Deborah A / Pasricha, Shivani

    Sexually transmitted infections

    2024  Volume 100, Issue 1, Page(s) 48–51

    Abstract: Objectives: To ensure accurate diagnosis of infectious diseases, preanalytical factors should be considered when assessing specimen quality and subsequent test result. Accordingly, we aimed to systematically assess the effect of storage time, ... ...

    Abstract Objectives: To ensure accurate diagnosis of infectious diseases, preanalytical factors should be considered when assessing specimen quality and subsequent test result. Accordingly, we aimed to systematically assess the effect of storage time, temperature and buffer on the analytical sensitivity of detecting the sexually transmitted pathogen,
    Methods: Cultured
    Results: In total, 2756 samples were processed, with
    Conclusions: Increased prevalence of sample self-collection for sexually transmitted infections (STIs) warrants an evaluation of preanalytical sample storage variables on diagnostic testing performance. Here, across a range of time points, temperatures and storage buffers,
    MeSH term(s) Humans ; Neisseria gonorrhoeae/genetics ; Nucleic Acid Amplification Techniques/methods ; Chlamydia trachomatis/genetics ; Sensitivity and Specificity ; Chlamydia Infections/diagnosis ; Gonorrhea/diagnosis ; Sexually Transmitted Diseases ; Nucleic Acids
    Chemical Substances Nucleic Acids
    Language English
    Publishing date 2024-01-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 1420303-0
    ISSN 1472-3263 ; 1368-4973
    ISSN (online) 1472-3263
    ISSN 1368-4973
    DOI 10.1136/sextrans-2023-055859
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Emergence and clonal expansion of a qacA-harbouring sequence type 45 lineage of methicillin-resistant Staphylococcus aureus.

    Nong, Yi / Steinig, Eike / Pollock, Georgina L / Taiaroa, George / Carter, Glen P / Monk, Ian R / Pang, Stanley / Daley, Denise A / Coombs, Geoffrey W / Forde, Brian M / Harris, Patrick N A / Sherry, Norelle L / Howden, Benjamin P / Pasricha, Shivani / Baines, Sarah L / Williamson, Deborah A

    Communications biology

    2024  Volume 7, Issue 1, Page(s) 349

    Abstract: The past decade has seen an increase in the prevalence of sequence type (ST) 45 methicillin-resistant Staphylococcus aureus (MRSA), yet the underlying drivers for its emergence and spread remain unclear. To better understand the worldwide dissemination ... ...

    Abstract The past decade has seen an increase in the prevalence of sequence type (ST) 45 methicillin-resistant Staphylococcus aureus (MRSA), yet the underlying drivers for its emergence and spread remain unclear. To better understand the worldwide dissemination of ST45 S. aureus, we performed phylogenetic analyses of Australian isolates, supplemented with a global population of ST45 S. aureus genomes. Our analyses revealed a distinct lineage of multidrug-resistant ST45 MRSA harbouring qacA, predominantly found in Australia and Singapore. Bayesian inference predicted that the acquisition of qacA occurred in the late 1990s. qacA was integrated into a structurally variable region of the chromosome containing Tn552 (carrying blaZ) and Tn4001 (carrying aac(6')-aph(2")) transposable elements. Using mutagenesis and in vitro assays, we provide phenotypic evidence that qacA confers tolerance to chlorhexidine. These findings collectively suggest both antimicrobial resistance and the carriage of qacA may play a role in the successful establishment of ST45 MRSA.
    MeSH term(s) Humans ; Methicillin-Resistant Staphylococcus aureus/genetics ; Staphylococcus aureus/genetics ; Bayes Theorem ; Phylogeny ; Staphylococcal Infections/epidemiology ; Membrane Transport Proteins/genetics ; Bacterial Proteins/genetics ; Australia
    Chemical Substances Membrane Transport Proteins ; Bacterial Proteins
    Language English
    Publishing date 2024-03-21
    Publishing country England
    Document type Journal Article
    ISSN 2399-3642
    ISSN (online) 2399-3642
    DOI 10.1038/s42003-024-06012-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Structural and Functional Characterization of

    Voth, Kevin / Pasricha, Shivani / Chung, Ivy Yeuk Wah / Wibawa, Rachelia R / Zainudin, Engku Nuraishah Huda E / Hartland, Elizabeth L / Cygler, Miroslaw

    Biomolecules

    2021  Volume 11, Issue 12

    Abstract: Legionella ... ...

    Abstract Legionella pneumophila
    MeSH term(s) Adenosine Diphosphate Ribose/metabolism ; Bacterial Proteins/chemistry ; Bacterial Proteins/metabolism ; Crystallography, X-Ray ; HEK293 Cells ; HeLa Cells ; Humans ; Legionella pneumophila/enzymology ; Legionella pneumophila/growth & development ; Models, Molecular ; Protein Binding ; Protein Conformation ; Protein Folding ; THP-1 Cells ; Type IV Secretion Systems/chemistry ; Type IV Secretion Systems/metabolism ; Ubiquitin-Conjugating Enzymes/metabolism ; Ubiquitination
    Chemical Substances Bacterial Proteins ; Type IV Secretion Systems ; Adenosine Diphosphate Ribose (20762-30-5) ; UBE2Q1 protein, human (EC 2.3.2.23) ; Ubiquitin-Conjugating Enzymes (EC 2.3.2.23)
    Language English
    Publishing date 2021-11-30
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2701262-1
    ISSN 2218-273X ; 2218-273X
    ISSN (online) 2218-273X
    ISSN 2218-273X
    DOI 10.3390/biom11121802
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: The Impact of Mouthwash on the Oropharyngeal Microbiota of Men Who Have Sex with Men: a Substudy of the OMEGA Trial.

    Plummer, Erica L / Maddaford, Kate / Murray, Gerald L / Fairley, Christopher K / Pasricha, Shivani / Mu, Andre / Bradshaw, Catriona S / Williamson, Deborah A / Chow, Eric P F

    Microbiology spectrum

    2022  Volume 10, Issue 1, Page(s) e0175721

    Abstract: Mouthwash is a commonly used product and has been proposed as an alternative intervention to prevent gonorrhea transmission. However, the long-term effects of mouthwash on the oral microbiota are largely unknown. We investigated the impact of 12 weeks of ...

    Abstract Mouthwash is a commonly used product and has been proposed as an alternative intervention to prevent gonorrhea transmission. However, the long-term effects of mouthwash on the oral microbiota are largely unknown. We investigated the impact of 12 weeks of daily mouthwash use on the oropharyngeal microbiota in a subset of men who have sex with men who participated in a randomized trial comparing the efficacy of two alcohol-free mouthwashes for the prevention of gonorrhea. We characterized the oropharyngeal microbiota using 16S rRNA gene sequencing of tonsillar fossae samples collected before and after 12 weeks of daily use of Listerine mouthwash or Biotène dry mouth oral rinse. Permutational multivariate analysis of variance (PERMANOVA) was used to assess differences in oropharyngeal microbiota composition following mouthwash use. Differential abundance testing was performed using ALDEx2, with false-discovery rate correction. A total of 306 samples from 153 men were analyzed (Listerine,
    MeSH term(s) Adult ; Double-Blind Method ; Drug Combinations ; Glucose Oxidase/pharmacology ; Gonorrhea ; Homosexuality, Male ; Humans ; Lactoperoxidase/pharmacology ; Male ; Microbiota/drug effects ; Microbiota/genetics ; Mouthwashes/pharmacology ; Muramidase/pharmacology ; Oropharynx/microbiology ; RNA, Ribosomal, 16S ; Salicylates ; Sexual and Gender Minorities ; Terpenes ; Young Adult
    Chemical Substances Biotene ; Drug Combinations ; Mouthwashes ; RNA, Ribosomal, 16S ; Salicylates ; Terpenes ; Listerine (51273-66-6) ; Glucose Oxidase (EC 1.1.3.4) ; Lactoperoxidase (EC 1.11.1.-) ; Muramidase (EC 3.2.1.17)
    Language English
    Publishing date 2022-01-12
    Publishing country United States
    Document type Journal Article ; Multicenter Study ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
    ZDB-ID 2807133-5
    ISSN 2165-0497 ; 2165-0497
    ISSN (online) 2165-0497
    ISSN 2165-0497
    DOI 10.1128/spectrum.01757-21
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Inhibitory Activity of Antibacterial Mouthwashes and Antiseptic Substances against Neisseria gonorrhoeae.

    Williams, Eloise / Zhang, Bowen / Chow, Eric P F / Chea, Socheata / Phillips, Tiffany R / Maddaford, Kate / Krysiak, Marcelina / Nong, Yi / Stefanatos, Helen / Pasricha, Shivani / Fairley, Christopher K / Wiliamson, Deborah A

    Antimicrobial agents and chemotherapy

    2022  Volume 66, Issue 6, Page(s) e0004222

    Abstract: Improved treatment and prevention strategies, such as antimicrobial mouthwashes, may be important for addressing the public health threat of antimicrobial-resistant Neisseria gonorrhoeae. Here, we describe the activity of seven common antibacterial ... ...

    Abstract Improved treatment and prevention strategies, such as antimicrobial mouthwashes, may be important for addressing the public health threat of antimicrobial-resistant Neisseria gonorrhoeae. Here, we describe the activity of seven common antibacterial mouthwashes and antiseptics against N. gonorrhoeae isolates, incorporating the use of a human saliva test matrix. Our data demonstrate that antibacterial mouthwashes and antiseptics vary in their ability to inhibit the
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Anti-Infective Agents ; Anti-Infective Agents, Local/pharmacology ; Gonorrhea/drug therapy ; Gonorrhea/microbiology ; Humans ; Microbial Sensitivity Tests ; Mouthwashes/pharmacology ; Neisseria gonorrhoeae
    Chemical Substances Anti-Bacterial Agents ; Anti-Infective Agents ; Anti-Infective Agents, Local ; Mouthwashes
    Language English
    Publishing date 2022-05-17
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 217602-6
    ISSN 1098-6596 ; 0066-4804
    ISSN (online) 1098-6596
    ISSN 0066-4804
    DOI 10.1128/aac.00042-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Legionella pneumophila

    Li, Pengfei / Vassiliadis, Dane / Ong, Sze Ying / Bennett-Wood, Vicki / Sugimoto, Chihiro / Yamagishi, Junya / Hartland, Elizabeth L / Pasricha, Shivani

    Frontiers in cellular and infection microbiology

    2020  Volume 10, Page(s) 428

    Abstract: Legionella ... ...

    Abstract Legionella pneumophila
    MeSH term(s) Acanthamoeba castellanii ; Bacterial Proteins/genetics ; Humans ; Legionella pneumophila/genetics ; Legionnaires' Disease ; Sirtuins ; Transcriptome
    Chemical Substances Bacterial Proteins ; Sirtuins (EC 3.5.1.-)
    Language English
    Publishing date 2020-08-20
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2619676-1
    ISSN 2235-2988 ; 2235-2988
    ISSN (online) 2235-2988
    ISSN 2235-2988
    DOI 10.3389/fcimb.2020.00428
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: A comparison of cotton-tipped and nylon flocked swabs for culture of Neisseria gonorrhoeae from oropharyngeal samples.

    Phillips, Tiffany R / Tabesh, Marjan / Fairley, Christopher K / Maddaford, Kate / Pasricha, Shivani / Wigan, Rebecca / De Petra, Vesna / Williamson, Deborah A / Chow, Eric P F

    Diagnostic microbiology and infectious disease

    2021  Volume 101, Issue 3, Page(s) 115455

    Abstract: Our aim was to determine if there was a difference in culture positivity for oropharyngeal gonorrhoea when sampling using a nylon-flocked versus cotton-tipped swab. We collected FLOQSwabs and cotton-tipped swabs from individuals aged ≥ 18 years who had ... ...

    Abstract Our aim was to determine if there was a difference in culture positivity for oropharyngeal gonorrhoea when sampling using a nylon-flocked versus cotton-tipped swab. We collected FLOQSwabs and cotton-tipped swabs from individuals aged ≥ 18 years who had untreated oropharyngeal gonorrhoea detected by NAAT between November 2019-June 2020.Of 78 participants, 32 (41.0%) were culture-positive for N. gonorrhoeae from either swab. Of these 32, 29 (90.6%, 95%CI: 75.0%-98.0%) were positive on both swabs, one (3.1%, 95%CI: 0.0%-16.2%) tested positive on FLOQSwab only and two (6.2%, 95%CI: 0.1%-20.8%) tested positive on cotton-tipped swabs only. There was moderate agreement between the swabs in the amount of bacterial growth (Cohen's Kappa (k)=0.745; 95%CI: 0.622-0.868, p<0.001). Our results showed that the proportion of positive results was comparable using the FLOQSwabs versus the cotton-tipped swabs for oropharyngeal gonorrhoea culture.
    MeSH term(s) Cross-Sectional Studies ; Female ; Gonorrhea/diagnosis ; Gonorrhea/microbiology ; Humans ; Male ; Middle Aged ; Neisseria gonorrhoeae/growth & development ; Neisseria gonorrhoeae/isolation & purification ; Nylons ; Oropharynx/microbiology ; Pilot Projects ; Respiratory Tract Infections/microbiology ; Specimen Handling/instrumentation ; Specimen Handling/methods ; Specimen Handling/standards ; Textiles ; Young Adult
    Chemical Substances Nylons
    Language English
    Publishing date 2021-06-18
    Publishing country United States
    Document type Comparative Study ; Journal Article
    ZDB-ID 604920-5
    ISSN 1879-0070 ; 0732-8893
    ISSN (online) 1879-0070
    ISSN 0732-8893
    DOI 10.1016/j.diagmicrobio.2021.115455
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Clinical relevance of topical antibiotic use in co-selecting for multidrug-resistant

    Nong, Yi / Taiaroa, George / Pasricha, Shivani / Guérillot, Romain / Monk, Ian R / Baines, Sarah L / Carter, Glen P / Howden, Benjamin P / Williamson, Deborah A

    Antimicrobial agents and chemotherapy

    2021  Volume 95, Issue 5

    Abstract: Topical antibiotic preparations, such as fusidic acid (FA) or mupirocin, are used in the prevention and treatment of superficial skin infections caused by staphylococci. Previous genomic epidemiology work has suggested an association between the ... ...

    Abstract Topical antibiotic preparations, such as fusidic acid (FA) or mupirocin, are used in the prevention and treatment of superficial skin infections caused by staphylococci. Previous genomic epidemiology work has suggested an association between the widespread use of topical antibiotics and the emergence of methicillin resistant
    Language English
    Publishing date 2021-02-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 217602-6
    ISSN 1098-6596 ; 0066-4804
    ISSN (online) 1098-6596
    ISSN 0066-4804
    DOI 10.1128/AAC.02048-20
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Use of emerging testing technologies and approaches for SARS-CoV-2: review of literature and global experience in an Australian context.

    Graham, Maryza / Ballard, Susan A / Pasricha, Shivani / Lin, Belinda / Hoang, Tuyet / Stinear, Timothy / Druce, Julian / Catton, Mike / Sherry, Norelle / Williamson, Deborah / Howden, Benjamin P

    Pathology

    2021  Volume 53, Issue 6, Page(s) 689–699

    Abstract: Emerging testing technologies for detection of SARS-CoV-2 include those that are rapid and can be used at point-of-care (POC), and those facilitating high throughput laboratory-based testing. Tests designed to be performed at POC (such as antigen tests ... ...

    Abstract Emerging testing technologies for detection of SARS-CoV-2 include those that are rapid and can be used at point-of-care (POC), and those facilitating high throughput laboratory-based testing. Tests designed to be performed at POC (such as antigen tests and molecular assays) have the potential to expedite isolation of infectious patients and their contacts, but most are less sensitive than standard-of-care reverse transcription polymerase chain reaction (RT-PCR). Data on clinical performance of the majority of emerging assays are limited with most evaluations performed on contrived or stored laboratory samples. Further evaluations of these assays are required, particularly when performed at POC on symptomatic and asymptomatic patients and at various time-points after symptom onset. A few studies have so far shown several of these assays have high specificity. However, large prospective evaluations are needed to confirm specificity, particularly before the assays are implemented in low prevalence settings or asymptomatic populations. High throughput laboratory-based testing includes the use of new sample types (e.g., saliva to increase acceptability) or innovative uses of existing technology (e.g., sample pooling). Information detailing population-wide testing strategies for SARS-COV-2 is largely missing from peer-reviewed literature. Logistics and supply chains are key considerations in any plan to 'scale up' testing in the Australian context. The strategic use of novel assays will help strike the balance between achieving adequate test numbers without overwhelming laboratory capacity. To protect testing of high-risk populations, the aims of testing with respect to the phase of the pandemic must be considered.
    MeSH term(s) Australia ; COVID-19/diagnosis ; COVID-19 Testing/methods ; Humans ; SARS-CoV-2
    Language English
    Publishing date 2021-08-10
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 7085-3
    ISSN 1465-3931 ; 0031-3025
    ISSN (online) 1465-3931
    ISSN 0031-3025
    DOI 10.1016/j.pathol.2021.08.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Rapid detection of monkeypox virus using a CRISPR-Cas12a mediated assay: a laboratory validation and evaluation study.

    Low, Soo Jen / O'Neill, Matthew T / Kerry, William J / Krysiak, Marcelina / Papadakis, Georgina / Whitehead, Lachlan W / Savic, Ivana / Prestedge, Jacqueline / Williams, Lewis / Cooney, James P / Tran, Thomas / Lim, Chuan K / Caly, Leon / Towns, Janet M / Bradshaw, Catriona S / Fairley, Christopher / Chow, Eric P F / Chen, Marcus Y / Pellegrini, Marc /
    Pasricha, Shivani / Williamson, Deborah A

    The Lancet. Microbe

    2023  Volume 4, Issue 10, Page(s) e800–e810

    Abstract: Background: The 2022 outbreak of mpox (formerly known as monkeypox) led to the spread of monkeypox virus (MPXV) in over 110 countries, demanding effective disease management and surveillance. As current diagnostics rely largely on centralised laboratory ...

    Abstract Background: The 2022 outbreak of mpox (formerly known as monkeypox) led to the spread of monkeypox virus (MPXV) in over 110 countries, demanding effective disease management and surveillance. As current diagnostics rely largely on centralised laboratory testing, our objective was to develop a simple rapid point-of-care assay to detect MPXV in clinical samples using isothermal amplification coupled with CRISPR and CRISPR-associated protein (Cas) technology.
    Methods: In this proof-of-concept study, we developed a portable isothermal amplification CRISPR-Cas12a-based assay for the detection of MPXV. We designed a panel of 22 primer-guide RNA sets using pangenome and gene-agnostic approaches, and subsequently shortlisted the three sets producing the strongest signals for evaluation of analytical sensitivity and specificity using a fluorescence-based readout. The set displaying 100% specificity and the lowest limit of detection (LOD) was selected for further assay validation using both a fluorescence-based and lateral-flow readout. Assay specificity was confirmed using a panel of viral and bacterial pathogens. Finally, we did a blind concordance study on genomic DNA extracted from 185 clinical samples, comparing assay results with a gold-standard quantitative PCR (qPCR) assay. We identified the optimal time to detection and analysed the performance of the assay relative to qPCR using receiver operating characteristic (ROC) curves. We also assessed the compatibility with lateral-flow strips, both visually and computationally, where strips were interpreted blinded to the fluorescence results on the basis of the presence or absence of test bands.
    Findings: With an optimal run duration of approximately 45 min from isothermal amplification to CRISPR-assay readout, the MPXV recombinase polymerase amplification CRISPR-Cas12a-based assay with the selected primer-guide set had an LOD of 1 copy per μL and 100% specificity against tested viral pathogens. Blinded concordance testing of 185 clinical samples resulted in 100% sensitivity (95% CI 89·3-100) and 99·3% specificity (95% CI 95·7-100) using the fluorescence readout. For optimal time to detection by fluorescence readout, we estimated the areas under the ROC curve to be 0·98 at 2 min and 0·99 at 4 min. Lateral-flow strips had 100% sensitivity (89·3-100) and 98·6% specificity (94·7-100) with both visual and computational assessment. Overall, lateral-flow results were highly concordant with fluorescence-based readouts (179 of 185 tests, 96·8% concordant), with discrepancies associated with low viral load samples.
    Interpretation: Our assay for the diagnosis of mpox displayed good performance characteristics compared with qPCR. Although optimisation of the assay will be required before deployment, its usability and versatility present a potential solution to MPXV detection in low-resource and remote settings, as well as a means of community-based, on-site testing.
    Funding: Victorian Medical Research Accelerator Fund and the Australian Government Department of Health.
    Language English
    Publishing date 2023-09-15
    Publishing country England
    Document type Journal Article
    ISSN 2666-5247
    ISSN (online) 2666-5247
    DOI 10.1016/S2666-5247(23)00148-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top