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Sapugahawatte DN, Godakumara K, Mäesaar M, Ekanayake G, Midekessa GB, Prasadani M, Kodithuwakku S, Roasto M, Andronowska A, Fazeli A. Harnessing Nature's Defence: The Antimicrobial Efficacy of Pasteurised Cattle Milk-Derived Extracellular Vesicles on Staphylococcus aureus ATCC 25923. Int J Mol Sci 2024; 25:4759. [PMID: 38731976 PMCID: PMC11083917 DOI: 10.3390/ijms25094759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/13/2024] Open
Abstract
Increasing antimicrobial resistance (AMR) challenges conventional antibiotics, prompting the search for alternatives. Extracellular vesicles (EVs) from pasteurised cattle milk offer promise, due to their unique properties. This study investigates their efficacy against five pathogenic bacteria, including Staphylococcus aureus ATCC 25923, aiming to combat AMR and to develop new therapies. EVs were characterised and tested using various methods. Co-culture experiments with S. aureus showed significant growth inhibition, with colony-forming units decreasing from 2.4 × 105 CFU/mL (single dose) to 7.4 × 104 CFU/mL (triple doses) after 12 h. Milk EVs extended lag time (6 to 9 h) and increased generation time (2.8 to 4.8 h) dose-dependently, compared to controls. In conclusion, milk EVs exhibit dose-dependent inhibition against S. aureus, prolonging lag and generation times. Despite limitations, this suggests their potential in addressing AMR.
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Affiliation(s)
- Dulmini Nanayakkara Sapugahawatte
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 62, 51006 Tartu, Estonia; (D.N.S.); (K.G.); (G.E.); (G.B.M.); (M.P.); (S.K.)
| | - Kasun Godakumara
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 62, 51006 Tartu, Estonia; (D.N.S.); (K.G.); (G.E.); (G.B.M.); (M.P.); (S.K.)
| | - Mihkel Mäesaar
- Chair of Veterinary Biomedicine and Food Hygiene, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 56/3, 51006 Tartu, Estonia; (M.M.); (M.R.)
| | - Gayandi Ekanayake
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 62, 51006 Tartu, Estonia; (D.N.S.); (K.G.); (G.E.); (G.B.M.); (M.P.); (S.K.)
| | - Getnet Balcha Midekessa
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 62, 51006 Tartu, Estonia; (D.N.S.); (K.G.); (G.E.); (G.B.M.); (M.P.); (S.K.)
- Department of Pathophysiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 14b, 50411 Tartu, Estonia
| | - Madhusha Prasadani
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 62, 51006 Tartu, Estonia; (D.N.S.); (K.G.); (G.E.); (G.B.M.); (M.P.); (S.K.)
| | - Suranga Kodithuwakku
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 62, 51006 Tartu, Estonia; (D.N.S.); (K.G.); (G.E.); (G.B.M.); (M.P.); (S.K.)
- Department of Animal Sciences, Faculty of Agriculture, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Mati Roasto
- Chair of Veterinary Biomedicine and Food Hygiene, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 56/3, 51006 Tartu, Estonia; (M.M.); (M.R.)
| | - Aneta Andronowska
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Juliana Tuwima St. 10, 10-748 Olsztyn, Poland;
| | - Alireza Fazeli
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 62, 51006 Tartu, Estonia; (D.N.S.); (K.G.); (G.E.); (G.B.M.); (M.P.); (S.K.)
- Chair of Veterinary Biomedicine and Food Hygiene, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 56/3, 51006 Tartu, Estonia; (M.M.); (M.R.)
- Division of Clinical Medicine, School of Medicine & Population Health, University of Sheffield, Level 4, Jessop Wing, Tree Root Walk, Sheffield S10 2SF, UK
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Yang L, Dharmaratne P, Zhu C, Sapugahawatte DN, Rahman N, Barua N, Li C, Kwok KO, Luo M, Liyanapathirana V, Ip M. Global epidemiology of asymptomatic colonisation of methicillin-resistant Staphylococcus aureus in the upper respiratory tract of young children: a systematic review and meta-analysis. Arch Dis Child 2024; 109:267-274. [PMID: 38296611 PMCID: PMC10958260 DOI: 10.1136/archdischild-2023-326124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 01/07/2024] [Indexed: 03/21/2024]
Abstract
OBJECTIVE To estimate the global prevalence of asymptomatic colonisation, and determine the associated risk factors, antibiotic resistance and genotypes of methicillin-resistant Staphylococcus aureus (MRSA) in the upper respiratory tract of young children. DESIGN Four bibliometric databases were searched for publications between 2010 and 2022 according to the protocol registered in PROSPERO. Cross-sectional or cohort studies describing the prevalence of asymptomatic colonisation of S. aureus and MRSA in young children were included. Data extraction and analysis were carried out by two reviewers independently according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2020 statement. Pooled prevalence was estimated using a random effects model. SETTING AND STUDIES We included studies where children without respiratory tract infection or Staphylococcal infection were recruited from the community, children's institutions (ie, nurseries, kindergartens, daycare centres and preschools) and healthcare centre visits and assessed for asymptomatic colonisation with S. aureus and MRSA. MAIN OUTCOME MEASURES The pooled prevalence of asymptomatic colonisation of S. aureus and MRSA of young children globally. RESULTS In this systematic review and meta-analysis of 21 416 young children, the pooled global prevalence of asymptomatic S. aureus colonisation was 25.1% (95% CI 21.4 to 28.8) and MRSA colonisation was 3.4% (95% CI 2.8 to 4.1). The clones of MRSA strains included healthcare-associated MRSA, community-associated MRSA and livestock-associated MRSA. CONCLUSION This study provides evidence of increased MRSA colonisation globally among young children, underlining the critical role of asymptomatic carriers in MRSA transmission and the need for control measures. PROSPERO REGISTRATION NUMBER CRD 42022328385.
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Affiliation(s)
- Liuyue Yang
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Priyanga Dharmaratne
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Chendi Zhu
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | | | - Nannur Rahman
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Department of Food Technology and Nutritional Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh
| | - Nilakshi Barua
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Carmen Li
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Kin On Kwok
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Mingjing Luo
- Center for Synthetic Microbiome, Shenzhen Institute of Synthetic Biology, CAS, Shenzhen, China
| | | | - Margaret Ip
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
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Ren Y, Li C, Nanayakkara Sapugahawatte D, Zhu C, Spänig S, Jamrozy D, Rothen J, Daubenberger CA, Bentley SD, Ip M, Heider D. Predicting hosts and cross-species transmission of Streptococcus agalactiae by interpretable machine learning. Comput Biol Med 2024; 171:108185. [PMID: 38401454 DOI: 10.1016/j.compbiomed.2024.108185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/13/2024] [Accepted: 02/18/2024] [Indexed: 02/26/2024]
Abstract
BACKGROUND Streptococcus agalactiae, commonly known as Group B Streptococcus (GBS), exhibits a broad host range, manifesting as both a beneficial commensal and an opportunistic pathogen across various species. In humans, it poses significant risks, causing neonatal sepsis and meningitis, along with severe infections in adults. Additionally, it impacts livestock by inducing mastitis in bovines and contributing to epidemic mortality in fish populations. Despite its wide host spectrum, the mechanisms enabling GBS to adapt to specific hosts remain inadequately elucidated. Therefore, the development of a rapid and accurate method differentiates GBS strains associated with particular animal hosts based on genome-wide information holds immense potential. Such a tool would not only bolster the identification and containment efforts during GBS outbreaks but also deepen our comprehension of the bacteria's host adaptations spanning humans, livestock, and other natural animal reservoirs. METHODS AND RESULTS Here, we developed three machine learning models-random forest (RF), logistic regression (LR), and support vector machine (SVM) based on genome-wide mutation data. These models enabled precise prediction of the host origin of GBS, accurately distinguishing between human, bovine, fish, and pig hosts. Moreover, we conducted an interpretable machine learning using SHapley Additive exPlanations (SHAP) and variant annotation to uncover the most influential genomic features and associated genes for each host. Additionally, by meticulously examining misclassified samples, we gained valuable insights into the dynamics of host transmission and the potential for zoonotic infections. CONCLUSIONS Our study underscores the effectiveness of random forest (RF) and logistic regression (LR) models based on mutation data for accurately predicting GBS host origins. Additionally, we identify the key features associated with each GBS host, thereby enhancing our understanding of the bacteria's host-specific adaptations.
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Affiliation(s)
- Yunxiao Ren
- Department for Data Science in Biomedicine, Faculty of Mathematics and Computer Science, Philipps-University of Marburg, Marburg, Germany
| | - Carmen Li
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | | | - Chendi Zhu
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Sebastian Spänig
- Department for Data Science in Biomedicine, Faculty of Mathematics and Computer Science, Philipps-University of Marburg, Marburg, Germany
| | - Dorota Jamrozy
- Parasites and Microbes Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Julian Rothen
- Swiss Tropical and Public Health Institute (Swiss TPH) Basel, Department of Medical Parasitology and Infection Biology, 4002, Basel, Switzerland; University of Basel, 4002, Basel, Switzerland
| | - Claudia A Daubenberger
- Swiss Tropical and Public Health Institute (Swiss TPH) Basel, Department of Medical Parasitology and Infection Biology, 4002, Basel, Switzerland; University of Basel, 4002, Basel, Switzerland
| | - Stephen D Bentley
- Parasites and Microbes Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Margaret Ip
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Dominik Heider
- Department for Data Science in Biomedicine, Faculty of Mathematics and Computer Science, Philipps-University of Marburg, Marburg, Germany; Institute for Computer Science, University of Düsseldorf, 40211, Düsseldorf, Germany; Center for Digital Health, Heinrich Heine University Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.
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Sapugahawatte DN, Li C, Liyanapathirana V, Kandauda C, Gihan C, Zhu C, Lo NWS, Wong KT, Ip M. Colonization of Group B Streptococcus in Pregnant Women and Their Neonates from a Sri Lankan Hospital. Pathogens 2022; 11:pathogens11040386. [PMID: 35456061 PMCID: PMC9029214 DOI: 10.3390/pathogens11040386] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 03/20/2022] [Accepted: 03/21/2022] [Indexed: 01/25/2023] Open
Abstract
We investigated the molecular epidemiology of Streptococcus agalactiae (Group B Streptococcus, GBS) from carriage in a cohort of pregnant mothers and their respective newborns in a Teaching Hospital in Sri Lanka. GBS vaginal carriage was assessed on pregnant mothers at pre-delivery (n = 250), post-delivery (n = 130), and from peri-rectal swabs of neonates (n = 159) in a prospective study. All colonizing, non-duplicate GBS isolates (n = 60) were analyzed for antimicrobial susceptibilities, capsular serotyping, and whole-genome sequencing (WGS). The percentage of GBS carriage in mothers in the pre-delivery and post-delivery cohorts were 11.2% (n = 28) and 19.2% (n = 25), respectively, and 4.4% (n = 7) in neonates. GBS isolates predominantly belonged to serotype VI (17/60, 28.3%). The isolates spanned across 12 sequence types (STs), with ST1 (24/60, 40%) being the most predominant ST. Concomitant resistance to erythromycin, tetracyclines, and gentamicin was observed in eight strains (13.3%). WGS revealed the presence of antimicrobial resistance genes including ermA (5/60), mefA (1/60), msrD (1/60), and tetLMO (2/60, 28/60, and 1/60, respectively) among 60 strains. The study provides insight into the diversity of vaccine targets of GBS since serotype VI is yet to be covered in the vaccine development program.
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Affiliation(s)
- Dulmini Nanayakkara Sapugahawatte
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Carmen Li
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Veranja Liyanapathirana
- Department of Microbiology, Faculty of Medicine, University of Peradeniya, Peradeniya 20400, Sri Lanka;
| | - Chaminda Kandauda
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University of Peradeniya, Peradeniya 20400, Sri Lanka; (C.K.); (C.G.)
| | - Champika Gihan
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University of Peradeniya, Peradeniya 20400, Sri Lanka; (C.K.); (C.G.)
| | - Chendi Zhu
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Norman Wai Sing Lo
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Kam Tak Wong
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Margaret Ip
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
- Correspondence: ; Tel.: +852-3505-3333
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Sapugahawatte DN, Li C, Yeoh YK, Dharmaratne P, Zhu C, Ip M. Swine methicillin-resistant Staphylococcus aureus carrying toxic-shock syndrome toxin gene in Hong Kong, China. Emerg Microbes Infect 2021; 9:1534-1536. [PMID: 32573344 PMCID: PMC7473289 DOI: 10.1080/22221751.2020.1785335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We report a SCCmec II, ST39 methicillin-resistant Staphylococcus aureus isolate from pigs that harboured toxic-shock syndrome toxin gene (tsst-1). The gene was located in a rare pathogenicity island SaPI68111, which also carried enterotoxin genes that can cause fatal infections. Pigs may potentially serve as a reservoir for MRSA dissemination.
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Affiliation(s)
- Dulmini Nanayakkara Sapugahawatte
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong (SAR), People's Republic of China
| | - Carmen Li
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong (SAR), People's Republic of China
| | - Yun Kit Yeoh
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong (SAR), People's Republic of China
| | - Priyanga Dharmaratne
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong (SAR), People's Republic of China
| | - Chendi Zhu
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong (SAR), People's Republic of China
| | - Margaret Ip
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong (SAR), People's Republic of China
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Dharmaratne P, Sapugahawatte DN, Wang B, Chan CL, Lau KM, Lau CB, Fung KP, Ng DK, Ip M. Contemporary approaches and future perspectives of antibacterial photodynamic therapy (aPDT) against methicillin-resistant Staphylococcus aureus (MRSA): A systematic review. Eur J Med Chem 2020; 200:112341. [PMID: 32505848 DOI: 10.1016/j.ejmech.2020.112341] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 11/19/2022]
Abstract
The high prevalence of methicillin-resistant Staphylococcus aureus (MRSA) causing skin and soft tissue infections in both the community and healthcare settings challenges the limited options of effective antibiotics and motivates the search for alternative therapeutic solutions, such as antibacterial photodynamic therapy (aPDT). While many publications have described the promising anti-bacterial activities of PDT in vitro, its applications in vivo and in the clinic have been very limited. This limited availability may in part be due to variabilities in the selected photosensitizing agents (PS), the variable testing conditions used to examine anti-bacterial activities and their effectiveness in treating MRSA infections. We thus sought to systematically review and examine the evidence from existing studies on aPDT associated with MRSA and to critically appraise its current state of development and areas to be addressed in future studies. In 2018, we developed and registered a review protocol in the International Prospective Register of Systematic Reviews (PROSPERO) with registration No: CRD42018086736. Three bibliographical databases were consulted (PUBMED, MEDLINE, and EMBASE), and a total of 113 studies were included in this systematic review based on our eligibility criteria. Many variables, such as the use of a wide range of solvents, pre-irradiation times, irradiation times, light sources and light doses, have been used in the methods reported by researchers, which significantly affect the inter-study comparability and results. On another note, new approaches of linking immunoglobulin G (IgG), antibodies, efflux pump inhibitors, and bacteriophages with photosensitizers (PSs) and the incorporation of PSs into nano-scale delivery systems exert a direct effect on improving aPDT. Enhanced activities have also been achieved by optimizing the physicochemical properties of the PSs, such as the introduction of highly lipophilic, poly-cationic and site-specific modifications of the compounds. However, few in vivo studies (n = 17) have been conducted to translate aPDT into preclinical studies. We anticipate that further standardization of the experimental conditions and assessing the efficacy in vivo would allow this technology to be further applied in preclinical trials, so that aPDT would develop to become a sustainable, alternative therapeutic option against MRSA infection in the future.
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Affiliation(s)
- Priyanga Dharmaratne
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China.
| | | | - Baiyan Wang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China.
| | - Chung Lap Chan
- Institute of Chinese Medicine and State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, The Chinese University of Hong Kong, China.
| | - Kit-Man Lau
- Institute of Chinese Medicine and State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, The Chinese University of Hong Kong, China.
| | - Clara Bs Lau
- Institute of Chinese Medicine and State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, The Chinese University of Hong Kong, China.
| | - Kwok Pui Fung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China; CUHK-Zhejiang University Joint Laboratory on Natural Products and Toxicology Research, China.
| | - Dennis Kp Ng
- Department of Chemistry, Faculty of Science, The Chinese University of Hong Kong, Hong Kong (SAR), China
| | - Margaret Ip
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China; Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China.
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