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Yao J, Zhang Z, Pei H, Zhang T, Ruan Y, Liu C, Guo Y, Gu S, Xia Q. Magnetically modified bacteriophage-triggered ATP release activated EXPAR-CRISPR/Cas14a system for visual detection of Burkholderia pseudomallei. Biosens Bioelectron 2024; 257:116334. [PMID: 38678788 DOI: 10.1016/j.bios.2024.116334] [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: 01/13/2024] [Revised: 04/19/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024]
Abstract
Burkholderia pseudomallei, widely distributed in tropical and subtropical ecosystems, is capable of causing the fatal zoonotic disease melioidosis and exhibiting a global trend of dissemination. Rapid and sensitive detection of B. pseudomallei is essential for environmental monitoring as well as infection control. Here, we developed an innovative biosensor for quantitatively detecting B. pseudomallei relies on ATP released triggered by bacteriophage-induced bacteria lysis. The lytic bacteriophage vB_BpP_HN01, with high specificity, is employed alongside magnetic nanoparticles assembly to create a biological receptor, facilitating the capture and enrichment of viable target bacteria. Following a brief extraction and incubation process, the captured target undergoes rapid lysis to release contents including ATP. The EXPAR-CRISPR cascade reaction provides an efficient signal transduction and dual amplification module that allowing the generated ATP to guide the signal output as an activator, ultimately converting the target bacterial amount into a detectable fluorescence signal. The proposed bacteriophage affinity strategy exhibited superior performance for B. pseudomallei detection with a dynamic range from 10^2 to 10^7 CFU mL-1, and a LOD of 45 CFU mL-1 within 80 min. Moreover, with the output signal compatible across various monitoring methods, this work offers a robust assurance for rapid diagnosis and on-site environmental monitoring of B. pseudomallei.
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Affiliation(s)
- Juan Yao
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan, 571199, PR China; Nanobiosensing and Microfluidic Point-of-Care Testing, Key Laboratory of Luzhou, Department of Clinical Laboratory, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, Sichuan, 646000, PR China
| | - Zhang Zhang
- Department of Neurosurgery, Neurology Center, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, 571199, PR China
| | - Hua Pei
- Department of Clinical Laboratory, The Second Affiliated Hospital, Hainan Medical University, Haikou, Hainan, 571199, PR China
| | - Ting Zhang
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan, 571199, PR China
| | - Yuping Ruan
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan, 571199, PR China
| | - Chenyuan Liu
- Department of Neurosurgery, Neurology Center, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, 571199, PR China
| | - Yongcan Guo
- Nanobiosensing and Microfluidic Point-of-Care Testing, Key Laboratory of Luzhou, Department of Clinical Laboratory, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, Sichuan, 646000, PR China.
| | - Shuo Gu
- Department of Neurosurgery, Neurology Center, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, 571199, PR China.
| | - Qianfeng Xia
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan, 571199, PR China.
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2
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Seng R, Chomkatekaew C, Tandhavanant S, Saiprom N, Phunpang R, Thaipadungpanit J, Batty EM, Day NPJ, Chantratita W, West TE, Thomson NR, Parkhill J, Chewapreecha C, Chantratita N. Genetic diversity, determinants, and dissemination of Burkholderia pseudomallei lineages implicated in melioidosis in Northeast Thailand. Nat Commun 2024; 15:5699. [PMID: 38972886 PMCID: PMC11228029 DOI: 10.1038/s41467-024-50067-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 06/28/2024] [Indexed: 07/09/2024] Open
Abstract
Melioidosis is an often-fatal neglected tropical disease caused by an environmental bacterium Burkholderia pseudomallei. However, our understanding of the disease-causing bacterial lineages, their dissemination, and adaptive mechanisms remains limited. To address this, we conduct a comprehensive genomic analysis of 1,391 B. pseudomallei isolates collected from nine hospitals in northeast Thailand between 2015 and 2018, and contemporaneous isolates from neighbouring countries, representing the most densely sampled collection to date. Our study identifies three dominant lineages, each with unique gene sets potentially enhancing bacterial fitness in the environment. We find that recombination drives lineage-specific gene flow. Transcriptome analyses of representative clinical isolates from each dominant lineage reveal increased expression of lineage-specific genes under environmental conditions in two out of three lineages. This underscores the potential importance of environmental persistence for these dominant lineages. The study also highlights the influence of environmental factors such as terrain slope, altitude, and river direction on the geographical dispersal of B. pseudomallei. Collectively, our findings suggest that environmental persistence may play a role in facilitating the spread of B. pseudomallei, and as a prerequisite for exposure and infection, thereby providing useful insights for informing melioidosis prevention and control strategies.
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Affiliation(s)
- Rathanin Seng
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Chalita Chomkatekaew
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Sarunporn Tandhavanant
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Natnaree Saiprom
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Rungnapa Phunpang
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Janjira Thaipadungpanit
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Elizabeth M Batty
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Nicholas P J Day
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Wasun Chantratita
- Center for Medical Genomics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - T Eoin West
- Division of Pulmonary, Critical Care & Sleep Medicine, Department of Medicine, University of Washington, Seattle, WA, USA
- Department of Global Health, University of Washington, Seattle, WA, USA
| | - Nicholas R Thomson
- Parasites and Microbes Wellcome Sanger Institute, Cambridge, UK
- Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Julian Parkhill
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Claire Chewapreecha
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
- Parasites and Microbes Wellcome Sanger Institute, Cambridge, UK.
- Previous Affiliations: Bioinformatics and Systems Biology Program, School of Bioresource and Technology, King Mongkut University of Technology Thonburi, Bangkok, Thailand.
| | - Narisara Chantratita
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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Kumari S, Banu M, Ramanatha K, Barani R, Sridharan KS. Are Burkholderia Emerging Pathogens in patients with underlying morbidity: A case series. Heliyon 2024; 10:e33283. [PMID: 39021926 PMCID: PMC11253054 DOI: 10.1016/j.heliyon.2024.e33283] [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: 06/09/2023] [Revised: 06/14/2024] [Accepted: 06/18/2024] [Indexed: 07/20/2024] Open
Abstract
Burkholderia is a genus consisting of several species including the Burkholderia pseudomallei group, Burkholderia cepacia complex and other phytopathogens. Burkholderia species is a gram-negative bacillus with protean presentation that can be acquired from various sources, including water, soil, plant surfaces, and hospital environments. The organism on Gram staining is seen as gram-negative rod and on culture, the colonies are non-lactose fermenting. As it can mimic other diseases, it is frequently misdiagnosed and there is lack of awareness about the clinical spectrum of disease and diagnosis. This study aims to investigate varied clinical manifestations, identify potential risk factors and transmission modes and contribute to enhancing the clinical management of diseases. The increasing prevalence of Burkholderia infection implies its potential emergence as a significant public health concern, compounded by the growing incidence of diabetes, which has the potential to escalate the overall disease burden. The principal finding of the case series highlighted a spectrum of clinical presentations, emphasizing the need for comprehensive diagnostic strategies and tailored therapeutic interventions. These strategies will address the diverse manifestations and challenges posed by Burkholderia infections. This underscores the importance of heightened awareness among clinicians and microbiologists, given the need for extended treatment to achieve a complete cure and prevent potential relapses.
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Affiliation(s)
- Swati Kumari
- Department of Microbiology, Sri Ramachandra Institute of Higher Education and Research, Chennai, India, 600116
| | - Marleena Banu
- Department of Microbiology, Sri Ramachandra Institute of Higher Education and Research, Chennai, India, 600116
| | - Krishnapriya Ramanatha
- Department of Microbiology, Sri Ramachandra Institute of Higher Education and Research, Chennai, India, 600116
| | - Ramya Barani
- Department of Microbiology, Sri Ramachandra Institute of Higher Education and Research, Chennai, India, 600116
| | - Kopula Sathyamurthy Sridharan
- Department of Laboratory Medicine, Sri Ramachandra Institute of Higher Education and Research, Chennai, India, 600116
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Anggraini D, Siregar FM, Rosdiana D, Kemal RA, Yovi I, Triani ZD, Jasmin N, Dwijelita N, Webb JR, Mayo M, Kaestli M, Currie BJ. Epidemiology and genetic diversity of Burkholderia pseudomallei from Riau Province, Indonesia. PLoS Negl Trop Dis 2024; 18:e0012195. [PMID: 38805481 PMCID: PMC11161056 DOI: 10.1371/journal.pntd.0012195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 06/07/2024] [Accepted: 05/06/2024] [Indexed: 05/30/2024] Open
Abstract
Melioidosis is a bacterial infection caused by Burkholderia pseudomallei, that is common in tropical and subtropical countries including Southeast Asia and Northern Australia. The magnitude of undiagnosed and untreated melioidosis across the country remains unclear. Given its proximity to regions with high infection rates, Riau Province on Sumatera Island is anticipated to have endemic melioidosis. This study reports retrospectively collected data on 68 culture-confirmed melioidosis cases from two hospitals in Riau Province between January 1, 2009, and December 31, 2021, with full clinical data available on 41 cases. We also describe whole genome sequencing and genotypic analysis of six isolates of B. pseudomallei. The mean age of the melioidosis patients was 49.1 (SD 11.5) years, 85% were male and the most common risk factor was diabetes mellitus (78%). Pulmonary infection was the most common presentation (39%), and overall mortality was 41%. Lung as a focal infection (aOR: 6.43; 95% CI: 1.13-36.59, p = 0.036) and bacteremia (aOR: 15.21; 95% CI: 2.59-89.31, p = 0.003) were significantly associated with death. Multilocus sequence typing analysis conducted on six B.pseudomallei genomes identified three sequence types (STs), namely novel ST1794 (n = 3), ST46 (n = 2), and ST289 (n = 1). A phylogenetic tree of Riau B. pseudomallei whole genome sequences with a global dataset of genomes clearly distinguished the genomes of B. pseudomallei in Indonesia from the ancestral Australian clade and classified them within the Asian clade. This study expands the known presence of B. pseudomallei within Indonesia and confirms that Indonesian B. pseudomallei are genetically linked to those in the rest of Southeast Asia. It is anticipated that melioidosis will be found in other locations across Indonesia as laboratory capacities improve and standardized protocols for detecting and confirming suspected cases of melioidosis are more widely implemented.
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Affiliation(s)
- Dewi Anggraini
- Department of Microbiology, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
- Arifin Achmad General Hospital, Riau Province, Pekanbaru, Indonesia
- Eka Hospital Pekanbaru, Pekanbaru, Indonesia
| | - Fajri Marindra Siregar
- Arifin Achmad General Hospital, Riau Province, Pekanbaru, Indonesia
- Department of Biochemistry, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | - Dani Rosdiana
- Arifin Achmad General Hospital, Riau Province, Pekanbaru, Indonesia
- Department of Internal Medicine, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | - Rahmat Azhari Kemal
- Arifin Achmad General Hospital, Riau Province, Pekanbaru, Indonesia
- Department of Medical Biology, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | - Indra Yovi
- Arifin Achmad General Hospital, Riau Province, Pekanbaru, Indonesia
- Eka Hospital Pekanbaru, Pekanbaru, Indonesia
- Department of Pulmonology, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | | | - Novira Jasmin
- Department of Microbiology, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | - Norsila Dwijelita
- Department of Microbiology, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | - Jessica R. Webb
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Mark Mayo
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Mirjam Kaestli
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Bart J. Currie
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
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5
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Meumann EM, Limmathurotsakul D, Dunachie SJ, Wiersinga WJ, Currie BJ. Burkholderia pseudomallei and melioidosis. Nat Rev Microbiol 2024; 22:155-169. [PMID: 37794173 DOI: 10.1038/s41579-023-00972-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/04/2023] [Indexed: 10/06/2023]
Abstract
Burkholderia pseudomallei, the causative agent of melioidosis, is found in soil and water of tropical and subtropical regions globally. Modelled estimates of the global burden predict that melioidosis remains vastly under-reported, and a call has been made for it to be recognized as a neglected tropical disease by the World Health Organization. Severe weather events and environmental disturbance are associated with increased case numbers, and it is anticipated that, in some regions, cases will increase in association with climate change. Genomic epidemiological investigations have confirmed B. pseudomallei endemicity in newly recognized regions, including the southern United States. Melioidosis follows environmental exposure to B. pseudomallei and is associated with comorbidities that affect the immune response, such as diabetes, and with socioeconomic disadvantage. Several vaccine candidates are ready for phase I clinical trials. In this Review, we explore the global burden, epidemiology and pathophysiology of B. pseudomallei as well as current diagnostics, treatment recommendations and preventive measures, highlighting research needs and priorities.
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Affiliation(s)
- Ella M Meumann
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.
- Department of Infectious Diseases, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia.
| | - Direk Limmathurotsakul
- Mahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- NDM Centre for Global Health Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Susanna J Dunachie
- Mahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand
- NDM Centre for Global Health Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Willem J Wiersinga
- Division of Infectious Diseases, Center for Experimental Molecular Medicine, Amsterdam University Medical Centers, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Bart J Currie
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Department of Infectious Diseases, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia
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Laklaeng SN, Phu DH, Songsri J, Wisessombat S, Mala W, Senghoi W, Phothaworn P, Nuinoon M, Wongtawan T, Klangbud WK. A systematic review and meta-analysis of the global prevalence and relationships among Burkholderia pseudomallei sequence types isolated from humans, animals, and the environment. Vet World 2024; 17:26-36. [PMID: 38406370 PMCID: PMC10884566 DOI: 10.14202/vetworld.2024.26-36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 12/08/2023] [Indexed: 02/27/2024] Open
Abstract
Background and Aim Burkholderia pseudomallei, a highly pathogenic bacterium responsible for melioidosis, exhibits ecological ubiquity and thrives within soil and water reservoirs, posing significant infection risks to humans and animals through direct contact. The aim of this study was to elucidate the genetic diversity and prevalence patterns of B. pseudomallei sequence types (STs) across a global spectrum and to understand the relationships between strains isolated from different sources. Materials and Methods We performed a systematic review and meta-analysis in this study. Extensive research was carried out across three comprehensive databases, including PubMed, Scopus, and ScienceDirect with data collected from 1924 to 2023. Results A total of 40 carefully selected articles contributed 2737 B. pseudomallei isolates attributed to 729 distinct STs and were incorporated into the systematic review. Among these, ST46 emerged as the most prominent, featuring in 35% of the articles and demonstrating a dominant prevalence, particularly within Southeast Asia. Moreover, ST51 consistently appeared across human, animal, and environmental studies. Subsequently, we performed a meta-analysis, focusing on nine specific STs: ST46, ST51, ST54, ST70, ST84, ST109, ST289, ST325, and ST376. Surprisingly, no statistically significant differences in their pooled prevalence proportions were observed across these compartments for ST46, ST70, ST289, ST325, and ST376 (all p > 0.69). Conversely, the remaining STs, including ST51, ST54, ST84, and ST109, displayed notable variations in their prevalence among the three domains (all p < 0.04). Notably, the pooled prevalence of ST51 in animals and environmental samples surpassed that found in human isolates (p < 0.01). Conclusion To the best of our knowledge, this study is the first systematic review and meta-analysis to investigate the intricate relationships between STs and their sources and contributes significantly to our understanding of B. pseudomallei diversity within the One Health framework.
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Affiliation(s)
- Sa-ngob Laklaeng
- College of Graduate Studies, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Doan Hoang Phu
- College of Graduate Studies, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Faculty of Animal Science and Veterinary Medicine, Nong Lam University, Ho Chi Minh City 70000, Vietnam
| | - Jirarat Songsri
- Center of Excellence in Research for Melioidosis and Microorganisms, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Sueptrakool Wisessombat
- Center of Excellence in Research for Melioidosis and Microorganisms, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Wanida Mala
- Center of Excellence in Research for Melioidosis and Microorganisms, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Wilaiwan Senghoi
- Center of Excellence in Research for Melioidosis and Microorganisms, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Preeda Phothaworn
- Center of Excellence in Research for Melioidosis and Microorganisms, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Manit Nuinoon
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Tuempong Wongtawan
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Wiyada Kwanhian Klangbud
- Center of Excellence in Research for Melioidosis and Microorganisms, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
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Seng R, Chomkatekaew C, Tandhavanant S, Saiprom N, Phunpang R, Thaipadungpanit J, Batty EM, Day NPJ, Chantratita W, West TE, Thomson NR, Parkhill J, Chewapreecha C, Chantratita N. Genetic diversity, determinants, and dissemination of Burkholderia pseudomallei lineages implicated in melioidosis in northeast Thailand. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.02.543359. [PMID: 38106061 PMCID: PMC10723255 DOI: 10.1101/2023.06.02.543359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Melioidosis is an often-fatal neglected tropical disease caused by an environmental bacterium Burkholderia pseudomallei. However, our understanding of the disease-causing bacterial lineages, their dissemination, and adaptive mechanisms remains limited. To address this, we conducted a comprehensive genomic analysis of 1,391 B. pseudomallei isolates collected from nine hospitals in northeast Thailand between 2015 and 2018, and contemporaneous isolates from neighbouring countries, representing the most densely sampled collection to date. Our study identified three dominant lineages with unique gene sets enhancing bacterial fitness, indicating lineage-specific adaptation strategies. Crucially, recombination was found to drive lineage-specific gene flow. Transcriptome analyses of representative clinical isolates from each dominant lineage revealed heightened expression of lineage-specific genes in environmental versus infection conditions, notably under nutrient depletion, highlighting environmental persistence as a key factor in the success of dominant lineages. The study also revealed the role of environmental factors - slope of terrain, altitude, direction of rivers, and the northeast monsoons - in shaping B. pseudomallei geographical dispersal. Collectively, our findings highlight persistence in the environment as a pivotal element facilitating B. pseudomallei spread, and as a prelude to exposure and infection, thereby providing useful insights for informing melioidosis prevention and control strategies.
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Affiliation(s)
- Rathanin Seng
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Chalita Chomkatekaew
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Department of Veterinary Medicine, University of Cambridge, UK
| | - Sarunporn Tandhavanant
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Natnaree Saiprom
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Rungnapa Phunpang
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Janjira Thaipadungpanit
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Elizabeth M Batty
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Nicholas PJ Day
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Wasun Chantratita
- Center for Medical Genomics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - T. Eoin West
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Division of Pulmonary, Critical Care & Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington, USA
- Department of Global Health, University of Washington, Seattle, Washington, USA
| | | | - Julian Parkhill
- Department of Veterinary Medicine, University of Cambridge, UK
| | - Claire Chewapreecha
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Parasites and Microbes, Wellcome Sanger Institute, Cambridge, UK
- Previous Affiliations: Bioinformatics and Systems Biology Program, School of Bioresource and Technology, King Mongkut University of Technology Thonburi, Bangkok, Thailand
| | - Narisara Chantratita
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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Mariappan V, Vellasamy KM, Anpalagar RR, Lim YM, Zainal Abidin N, Subramaniam S, Nathan S. One Health surveillance approaches for melioidosis and glanders: The Malaysian perspective. Front Vet Sci 2022; 9:1056723. [PMID: 36590813 PMCID: PMC9798326 DOI: 10.3389/fvets.2022.1056723] [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: 09/29/2022] [Accepted: 11/28/2022] [Indexed: 12/23/2022] Open
Abstract
The One Health concept was initiated to promote the integration of human, animal, and environmental ecosystems into healthcare to ensure effective control and the sustainable governance of multifaceted health matters. Climate change, deforestation, and rigorous farming disrupt the environment, which serves as the natural habitat for many animals and microbes, increasing the likelihood of disease transmission between humans and animals. Melioidosis (neglected tropical diseases) and glanders are of humans and animals caused by the gram-negative bacteria Burkholderia pseudomallei and its close relative Burkholderia mallei, respectively. In Malaysia, although melioidosis is endemic, it is not a notifiable disease. Hence, the true prevalence of melioidosis in Malaysia is unknown and varies in different regions of the country, with reported hotspots associated with agriculture-related activities. To date, no incidence of human glanders has been reported in Malaysia, although occupational exposure for equine handlers and veterinary professionals remains a concern. Additionally, antibiotics are widely used in the healthcare and veterinary sectors to treat or prevent B. pseudomallei and B. mallei infections, leading to the emergence of resistance in B. pseudomallei. Lack of surveillance, research, assessment, and management of glanders and melioidosis is a major issue in Malaysia. Proper assessment systems and cross-discipline cooperation are vital to recognize and manage both diseases. Experts and practitioners from clinical and veterinary disciplines, environmentalists, law enforcement, policymakers, researchers, local communities, and other experts need to communicate, collaborate, and coordinate activities to fill the knowledge gap on glanders and melioidosis to reduce morbidity and mortality rates in the country. This review aims to define the organizational and functional characteristics of One Health surveillance approaches for glanders and melioidosis from a Malaysian perspective.
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Affiliation(s)
- Vanitha Mariappan
- Center for Toxicology and Health Risk Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia,*Correspondence: Vanitha Mariappan
| | - Kumutha Malar Vellasamy
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia,Kumutha Malar Vellasamy
| | - Rohan Raaj Anpalagar
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Yue-Min Lim
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Nurhamimah Zainal Abidin
- Faculty of Applied Sciences, School of Biology, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kuala Pilah, Negeri Sembilan, Malaysia
| | - Sreeramanan Subramaniam
- School of Biological Sciences, Universiti Sains Malaysia (USM), Georgetown, Penang, Malaysia,Chemical Centre Biology, Universiti Sains Malaysia (USM), Bayan Lepas, Penang, Malaysia,National Poison Centre, Universiti Sains Malaysia (USM), Georgetown, Penang, Malaysia
| | - Sheila Nathan
- Faculty of Science and Technology, School of Biosciences and Biotechnology, Universiti Kebangsaan Malaysia, Bangi, Malaysia
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9
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Selvam K, Ganapathy T, Najib MA, Khalid MF, Abdullah NA, Harun A, Wan Mohammad WMZ, Aziah I. Burden and Risk Factors of Melioidosis in Southeast Asia: A Scoping Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15475. [PMID: 36497549 PMCID: PMC9741171 DOI: 10.3390/ijerph192315475] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/13/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
This scoping review aims to provide a comprehensive overview of human melioidosis in Southeast Asia as well as to highlight knowledge gaps in the prevalence and risk factors of this life-threatening disease using available evidence-based data for better diagnosis and treatment. Preferred Reporting Items for Systematic Review and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR) was used as the guideline for this review. The literature search was conducted on 23 March 2022 through two electronic databases (PubMed and Scopus) using lists of keywords referring to the Medical Subject Headings (MeSH) thesaurus. A total of 38 articles related to human melioidosis were included from 645 screened articles. These studies were carried out between 1986 and 2019 in six Southeast Asian countries: Thailand, Cambodia, Malaysia, Myanmar, Singapore, and Vietnam. Melioidosis has been reported with a high disease prevalence among high-risk populations. Studies in Thailand (48.0%) and Cambodia (74.4%) revealed disease prevalence in patients with septic arthritis and children with suppurative parotitis, respectively. Other studies in Thailand (63.5%) and Malaysia (54.4% and 65.7%) showed a high seroprevalence of melioidosis among Tsunami survivors and military personnel, respectively. Additionally, this review documented soil and water exposure, diabetes mellitus, chronic renal failure, thalassemia, and children under the age of 15 as the main risk factors for melioidosis. Human melioidosis is currently under-reported in Southeast Asia and its true prevalence is unknown.
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Affiliation(s)
- Kasturi Selvam
- Institute for Research in Molecular Medicine (INFORMM), Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Thanasree Ganapathy
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Mohamad Ahmad Najib
- Institute for Research in Molecular Medicine (INFORMM), Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Muhammad Fazli Khalid
- Institute for Research in Molecular Medicine (INFORMM), Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Nor Azlina Abdullah
- Department of Community Medicine, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Azian Harun
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Jalan Raja Perempuan Zainab 2, Kubang Kerian 16150, Kelantan, Malaysia
| | - Wan Mohd Zahiruddin Wan Mohammad
- Department of Community Medicine, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Ismail Aziah
- Institute for Research in Molecular Medicine (INFORMM), Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
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10
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An Investigation of Burkholderia pseudomallei Seroprevalence in Market Pigs Slaughtered at Selected Pig Abattoirs in Uganda. Pathogens 2022; 11:pathogens11111363. [DOI: 10.3390/pathogens11111363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/08/2022] [Accepted: 11/14/2022] [Indexed: 11/17/2022] Open
Abstract
Burkholderia pseudomallei is a Gram-negative bacterium that causes melioidosis, a disease of humans and animals. It is primarily transmitted through direct contact with contaminated soil and surface water. The epidemiology of this pathogen in Africa, including Uganda, is largely unknown. The objectives of this study were to estimate the seroprevalence of B. pseudomallei in pigs slaughtered in central Uganda and to identify potential hotspots for this pathogen in the country. A total of 1035 pig sera were analyzed for serological responses to B. pseudomallei with type A and type B LPS using OPS type A and OPS type B ELISAs. Of the 1035 samples, 75 (7.25%, 95% CI: 5.8–9%) were seropositive to the OPS-A ELISA using a two standard deviations (SD) cutoff and 19 (1.84%, 95% CI: 1.2–2.9%) at 3 SD. For the OPS-B ELISA, 93/1035 (8.99%, 95% CI: 7.4–10.9%) were seropositive at the 2 SD cutoff, and 28/1035 (2.71%, 95% CI: 1.9–3.9%) at the 3 SD cutoff. Pigs slaughtered in central Uganda were exposed to B. pseudomallei, and there is a higher seroprevalence in the rainy months. Public health awareness campaigns about melioidosis may be needed.
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11
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Cycle-Inhibiting Factor Is Associated with Burkholderia pseudomallei Invasion in Human Neuronal Cells. BIOLOGY 2022; 11:biology11101439. [PMID: 36290346 PMCID: PMC9598235 DOI: 10.3390/biology11101439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/20/2022] [Accepted: 09/28/2022] [Indexed: 11/17/2022]
Abstract
Burkholderia pseudomallei is a pathogenic bacterium that causes human melioidosis, which is associated with a high mortality rate. However, the underlying mechanisms of B. pseudomallei pathogenesis are largely unknown. In this study, we examined the infection of human neuronal SH-Sy5y cells by several clinically relevant B. pseudomallei strains. We found that all tested B. pseudomallei strains can invade SH-Sy5y cells, undergo intracellular replication, cause actin-tail formation, and form multinucleated giant cells. Additionally, a deletion mutant of B. pseudomallei cycle-inhibiting factor (cif) was constructed that exhibited reduced invasion in SH-Sy5y cells. Complementation of cif restored invasion of the B. pseudomallei cif-deleted mutant. Our findings enhance understanding of B. pseudomallei pathogenicity in terms of the virulence factor Cif and demonstrate the function of Cif in neurological melioidosis. This may eventually lead to the discovery of novel targets for treatment and a strategy to control the disease.
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12
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Mohapatra PR, Mishra B. Prevention of melioidosis. J Family Med Prim Care 2022; 11:4981-4986. [PMID: 36505663 PMCID: PMC9731021 DOI: 10.4103/jfmpc.jfmpc_1_22] [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: 01/01/2022] [Revised: 02/27/2022] [Accepted: 03/02/2022] [Indexed: 11/07/2022] Open
Abstract
Melioidosis is a complex tropical disease linked with many complications. It is increasingly diagnosed in India. The clinical mimicry of this disease with several other common causes of pneumonia has kept the clinicians in ignorance. Usually, the diagnosis and appropriate management get delayed. The organism closely resembles the common contaminant Pseudomonas and is easily misidentified in microbiology laboratories. The diagnosis is often missed because of poor diagnostic sensitivity of blood culture, the gold standard of the diagnosis. All this contributes to increased morbidity and mortality. The rampant use of high-end broad-spectrum antibiotics like ceftazidime and meropenem at suboptimal dose and duration suppresses the diagnosis without eradicating the disease, leaving the chance of recurrence from its latency even after years. As an infectious disease, the cure and prevention depend on early diagnosis and treatment. An awareness of its peculiar presentations and history can differentiate clinically and suspect the condition much easily from other mimickers of tuberculosis to sepsis. Ultimately, the prevention of melioidosis remains the critical strategy. Increasing the number of cases and intricated management of this fatal but potentially curable disease had prompted us to take up the mission of preventing the disease by spreading knowledge and awareness.
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Affiliation(s)
- Prasanta Raghab Mohapatra
- Department of Pulmonary Medicine and Critical Care, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India,Address for correspondence: Dr. Prasanta Raghab Mohapatra, Department of Pulmonary Medicine and Critical Care, All India Institute of Medical Sciences, Bhubaneswar, Odisha - 751 019, India. E-mail:
| | - Baijayantimala Mishra
- Department of Microbiology, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
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13
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Khamwong M, Phanthanawiboon S, Salao K, Chareonsudjai S. Burkholderia pseudomallei biofilm phenotypes confined but surviving in neutrophil extracellular traps of varying appearance. Front Immunol 2022; 13:926788. [PMID: 36059509 PMCID: PMC9434113 DOI: 10.3389/fimmu.2022.926788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 07/26/2022] [Indexed: 11/23/2022] Open
Abstract
Melioidosis is a fatal infectious disease caused by Burkholderia pseudomallei. Complications following treatment are usually due to antibiotic resistance and relapse is mainly caused by B. pseudomallei biofilm. Although the release of neutrophil extracellular traps (NETs) is crucial to capture and eliminate bacterial pathogens, to date response of NETs to B. pseudomallei biofilm is poorly understood. Here we compare the NETs produced by neutrophils in response to B. pseudomallei H777 (a biofilm-producing strain containing the bpsl0618 gene), a biofilm-defect strain lacking this gene (B. pseudomallei M10) and a bpsl0618 biofilm-complemented strain, B. pseudomallei C17, in which function of bpsl0618 was restored. Co-cultivation of these strains with healthy human neutrophils at MOI 10 with or without cytochalasin D demonstrated that H777 significantly resisted neutrophil-mediated killing and non-phagocytotic mechanisms compared to M10 (p < 0.0001). Three distinct morphotypes of NETs were seen: “aggregated”, “spiky” and “cloudy”. These were induced in different proportions by the different bacterial strains. All types of NETs were shown to confine all B. pseudomallei strains. Strains H777 and C17 could stimulate production of twice as much extracellular DNA (234.62 ng/mL and 205.43 ng/mL, respectively) as did M10 (111.87 ng/mL). Cells of H777 and C17 were better able to survive in the presence of neutrophil killing mechanisms relative to M10 (p < 0.0001) and NET formation (p < 0.0001 and 0.05). These findings suggest that NET stimulation was insufficient to eradicate B. pseudomallei H777 and C17 despite their possession of bpsl0618, a sugar-transferase gene associated with biofilm formation ability. Our findings demonstrate that B. pseudomallei biofilm phenotype may be a key factor in assisting pathogens to escape killing by neutrophils. This work provides a better understanding of how B. pseudomallei biofilm-associated infections induce and survive NET formation, resulting in bacterial persistence and increased severity of disease.
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Affiliation(s)
- Muthita Khamwong
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | | | - Kanin Salao
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Research and Diagnostic Center for Emerging Infectious Disease (RCEID), Khon Kaen University, Khon Kaen, Thailand
| | - Sorujsiri Chareonsudjai
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Research and Diagnostic Center for Emerging Infectious Disease (RCEID), Khon Kaen University, Khon Kaen, Thailand
- *Correspondence: Sorujsiri Chareonsudjai,
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14
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Mohapatra PR, Mishra B. Burden of melioidosis in India and South Asia: Challenges and ways forward. THE LANCET REGIONAL HEALTH. SOUTHEAST ASIA 2022; 2:100004. [PMID: 37383295 PMCID: PMC10306050 DOI: 10.1016/j.lansea.2022.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Melioidosis is caused by the environmental bacterium Burkholderia pseudomallei. South Asia is estimated to have 44% of the global disease burden. Among South Asian countries, Bangladesh and Sri Lanka are considered endemic for melioidosis; a few cases have been reported from Nepal, and a few imported cases from Pakistan have also been reported. India has experienced an increase in numbers of melioidosis cases in the recent years. The bacteria is inherently present in the soil and enters the human body via skin abrasions, inhalation, or ingestion. As clinicians are often ignorant about the similar characteristics of this disease and several other common tropical diseases, it causes a major delay in the timely diagnosis and management. The organism is easily mistaken as Pseudomonas spp in microbiology laboratories and may be dismissed as a common laboratory contaminant. The poor diagnostic sensitivity of blood culture also leads to missed diagnosis. Hence, both clinical ignorance and missed laboratory diagnosis have misrepresented melioidosis as a rare entity. The key preventive interventions are avoiding contact with loose and muddy soils of meliodosis-endemic areas, and provision of safe drinking water. The present article describes the various possible attributes for melioidosis underdiagnosis and the challenges of improving the diagnosis in conjunction with viable solutions. Funding None.
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Affiliation(s)
| | - Baijayantimala Mishra
- Department of Microbiology, All India Institute of Medical Sciences, Bhubaneswar, India-751019
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15
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Di Fiore A, De Luca V, Langella E, Nocentini A, Buonanno M, Maria Monti S, Supuran CT, Capasso C, De Simone G. Biochemical, structural, and computational studies of a γ-carbonic anhydrase from the pathogenic bacterium Burkholderia pseudomallei. Comput Struct Biotechnol J 2022; 20:4185-4194. [PMID: 36016712 PMCID: PMC9389205 DOI: 10.1016/j.csbj.2022.07.033] [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: 05/20/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 11/09/2022] Open
Abstract
Melioidosis is a severe disease caused
Burkholderia pseudomallei. γ-carbonic anhydrases (γ-CAs) have been recently
introduced as novel antibacterial drug targets. A new γ-CA from B.
pseudomallei has been investigated by a
multidisciplinary approach. Obtained results provide an important starting point
for developing new anti-melioidosis drugs.
Melioidosis is a severe disease caused by the highly
pathogenic gram-negative bacterium Burkholderia
pseudomallei. Several studies have highlighted the broad
resistance of this pathogen to many antibiotics and pointed out the pivotal
importance of improving the pharmacological arsenal against it. Since γ-carbonic
anhydrases (γ-CAs) have been recently introduced as potential and novel
antibacterial drug targets, in this paper, we report a detailed characterization
of BpsγCA, a γ-CA from B.
pseudomallei by a multidisciplinary approach. In
particular, the enzyme was recombinantly produced and biochemically
characterized. Its catalytic activity at different pH values was measured, the
crystal structure was determined and theoretical pKa calculations were carried
out. Results provided a snapshot of the enzyme active site and dissected the
role of residues involved in the catalytic mechanism and ligand recognition.
These findings are an important starting point for developing new
anti-melioidosis drugs targeting BpsγCA.
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16
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Hodgetts K, Kleinecke M, Woerle C, Kaestli M, Budd R, Webb JR, Ward L, Mayo M, Currie BJ, Meumann EM. Melioidosis in the remote Katherine region of northern Australia. PLoS Negl Trop Dis 2022; 16:e0010486. [PMID: 35696415 PMCID: PMC9232150 DOI: 10.1371/journal.pntd.0010486] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 06/24/2022] [Accepted: 05/10/2022] [Indexed: 11/19/2022] Open
Abstract
Melioidosis is endemic in the remote Katherine region of northern Australia. In a population with high rates of chronic disease, social inequities, and extreme remoteness, the impact of melioidosis is exacerbated by severe weather events and disproportionately affects First Nations Australians. All culture-confirmed melioidosis cases in the Katherine region of the Australian Top End between 1989–2021 were included in the study, and the clinical features and epidemiology were described. The diversity of Burkholderia pseudomallei strains in the region was investigated using genomic sequencing. From 1989–2021 there were 128 patients with melioidosis in the Katherine region. 96/128 (75%) patients were First Nations Australians, 72/128 (56%) were from a very remote region, 68/128 (53%) had diabetes, 57/128 (44%) had a history of hazardous alcohol consumption, and 11/128 (9%) died from melioidosis. There were 9 melioidosis cases attributable to the flooding of the Katherine River in January 1998; 7/9 flood-associated cases had cutaneous melioidosis, five of whom recalled an inoculating event injury sustained wading through flood waters or cleaning up after the flood. The 126 first-episode clinical B. pseudomallei isolates that underwent genomic sequencing belonged to 107 different sequence types and were highly diverse, reflecting the vast geographic area of the study region. In conclusion, melioidosis in the Katherine region disproportionately affects First Nations Australians with risk factors and is exacerbated by severe weather events. Diabetes management, public health intervention for hazardous alcohol consumption, provision of housing to address homelessness, and patient education on melioidosis prevention in First Nations languages should be prioritised. Melioidosis, caused by the environmental bacterium Burkholderia pseudomallei, disproportionately affects Australian First Nations peoples in the Northern Territory of Australia. The Katherine region has some of the highest rates of homelessness in Australia, and social inequity impacts health outcomes for First Nations people whose access to care is further complicated by remoteness. In this study, we describe the clinical features and epidemiology of melioidosis in the Katherine region over a 32-year period. Almost three quarters of melioidosis cases were First Nations Australians, over half lived in a very remote region, and diabetes and hazardous alcohol consumption were common risk factors. Following a severe flooding event in the region in 1998, a spike in cases of melioidosis was seen, the majority presenting as skin and soft tissue infections. The B. pseudomallei isolates in the study were extremely genetically diverse, reflecting the large geographic area of the Katherine region. With predicted climate change-driven increases in severe weather events and subsequent increases in melioidosis cases, public health priorities in the region should include addressing high rates of homelessness and hazardous alcohol consumption, optimisation of diabetes management, and ongoing education in First Nations languages regarding prevention of B. pseudomallei exposure.
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Affiliation(s)
- Kay Hodgetts
- Department of Infectious Diseases, Wellington Regional Hospital, Wellington, New Zealand
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Mariana Kleinecke
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Celeste Woerle
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Mirjam Kaestli
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Richard Budd
- Katherine District Hospital, Katherine, Northern Territory, Australia
| | - Jessica R. Webb
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Department of Microbiology & Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Linda Ward
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Mark Mayo
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Bart J. Currie
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Ella M. Meumann
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- * E-mail:
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17
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Birnie E, Biemond JJ, Wiersinga WJ. Drivers of melioidosis endemicity: epidemiological transition, zoonosis, and climate change. Curr Opin Infect Dis 2022; 35:196-204. [PMID: 35665713 PMCID: PMC10128909 DOI: 10.1097/qco.0000000000000827] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
PURPOSE OF REVIEW Melioidosis, caused by the soil-dwelling bacterium Burkholderia pseudomallei, is a tropical infection associated with high morbidity and mortality. This review summarizes current insights into melioidosis' endemicity, focusing on epidemiological transitions, zoonosis, and climate change. RECENT FINDINGS Estimates of the global burden of melioidosis affirm the significance of hot-spots in Australia and Thailand. However, it also highlights the paucity of systematic data from South Asia, The Americas, and Africa. Globally, the growing incidence of diabetes, chronic renal and (alcoholic) liver diseases further increase the susceptibility of individuals to B. pseudomallei infection. Recent outbreaks in nonendemic regions have further exposed the hazard from the trade of animals and products as potential reservoirs for B. pseudomallei. Lastly, global warming will increase precipitation, severe weather events, soil salinity and anthrosol, all associated with the occurrence of B. pseudomallei. SUMMARY Epidemiological transitions, zoonotic hazards, and climate change are all contributing to the emergence of novel melioidosis-endemic areas. The adoption of the One Health approach involving multidisciplinary collaboration is important in unraveling the real incidence of B. pseudomallei, as well as reducing the spread and associated mortality.
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Affiliation(s)
- Emma Birnie
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine
- Amsterdam UMC location University of Amsterdam, Division of Infectious Diseases, Meibergdreef 9, Amsterdam, Netherlands
| | - Jason J. Biemond
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine
| | - W. Joost Wiersinga
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine
- Amsterdam UMC location University of Amsterdam, Division of Infectious Diseases, Meibergdreef 9, Amsterdam, Netherlands
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18
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Long-Term Studies of Biological Components of Atmospheric Aerosol: Trends and Variability. ATMOSPHERE 2022. [DOI: 10.3390/atmos13050651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background: Biological components of atmospheric aerosol affect the quality of atmospheric air. Long-term trends in changes of the concentrations of total protein (a universal marker of the biogenic component of atmospheric aerosol) and culturable microorganisms in the air are studied. Methods: Atmospheric air samples are taken at two locations in the south of Western Siberia and during airborne sounding of the atmosphere. Sample analysis is carried out in the laboratory using standard culture methods (culturable microorganisms) and the fluorescence method (total protein). Results: Negative trends in the average annual concentration of total protein and culturable microorganisms in the air are revealed over more than 20 years of observations. For the concentration of total protein and culturable microorganisms in the air, intra-annual dynamics is revealed. The ratio of the maximum and minimum values of these concentrations reaches an order of magnitude. The variability of concentrations does not exceed, as a rule, two times for total protein and three times for culturable microorganisms. At the same time, for the data obtained in the course of airborne sounding of the atmosphere, a high temporal stability of the vertical profiles of the studied concentrations was found. The detected biodiversity of culturable microorganisms in atmospheric air samples demonstrates a very high variability at all observation sites. Conclusions: The revealed long-term changes in the biological components of atmospheric aerosol result in a decrease in their contribution to the atmospheric air quality index.
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19
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Almarhabi H, Munshi A, Althobaiti M, Aljohani S, Abu Shanab R, Althaqafi A. Melioidosis Pneumonia in Saudi Arabia: A Rare Case Report and Review of the Literature. Cureus 2022; 14:e21871. [PMID: 35265411 PMCID: PMC8898048 DOI: 10.7759/cureus.21871] [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] [Accepted: 02/03/2022] [Indexed: 12/03/2022] Open
Abstract
Melioidosis is a serious infection caused by the bacterium Burkholderia pseudomallei (B. pseudomallei) mostly found in endemic areas like Southeast Asia and Northern Australia. However, in non-endemic regions, such as Saudi Arabia, it remains somewhat rare and unknown to healthcare workers and the public. Herein, we present a case of melioidosis in a 59-year-old Bangladeshi man who presented with pneumonia. He recently returned from Bangladesh, was a known case of type 2 diabetes on metformin, and presented to the emergency department (ED) with a history of cough, shortness of breath, and fever for three weeks. He was initially misdiagnosed and treated as pulmonary tuberculosis in another hospital prior to his latest presentation. Melioidosis is a severe infection that can be misdiagnosed due to variable presentation and low awareness among healthcare workers of the disease. Diagnosis requires high clinical suspicion, especially in patients who are coming from endemic areas with appropriate risk factors such as diabetes mellitus. Treatment with appropriate antibiotics for a long duration, and outpatient follow-up is vital to reduce the risk of recurrence.
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Affiliation(s)
- Hassan Almarhabi
- Infectious Diseases, King Abdullah Medical City, Jeddah, SAU.,Infectious Diseases, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU.,Infectious Diseases, King Abdullah International Medical Research Center, Jeddah, SAU
| | - Adeeb Munshi
- Infectious Diseases, King Abdulaziz Medical City, Jeddah, SAU.,Infectious Diseases, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU.,Infectious Diseases, King Abdullah International Medical Research Center, Jeddah, SAU
| | - Mohammed Althobaiti
- Radiology, King Abdulaziz Medical City, Jeddah, SAU.,Radiology, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU.,Radiology, King Abdullah International Medical Research Center, Jeddah, SAU
| | - Sara Aljohani
- Internal Medicine, King Saud Bin Abdulaziz University for Health Sciences College of Medicine, Jeddah, SAU
| | - Raneen Abu Shanab
- Internal Medicine, King Saud Bin Abdulaziz University for Health Sciences College of Medicine, Jeddah, SAU
| | - Abdulhakeem Althaqafi
- Infectious Diseases, King Abdulaziz Medical City, Jeddah, SAU.,Infectious Diseases, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU.,Medicine/Infectious Diseases, King Abdullah International Medical Research Center, Jeddah, SAU
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20
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Genomic epidemiology links Burkholderia pseudomallei from individual human cases to B. pseudomallei from targeted environmental sampling in Northern Australia. J Clin Microbiol 2022; 60:e0164821. [PMID: 35080450 DOI: 10.1128/jcm.01648-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Each case of melioidosis results from a single event when a human is infected by the environmental bacterium Burkholderia pseudomallei. Darwin in tropical northern Australia has the highest incidences of melioidosis globally and the Darwin Prospective Melioidosis Study (DPMS) commenced in 1989, documenting all culture confirmed melioidosis cases. From 2000-2019 we sampled DPMS patient's environments for B. pseudomallei when a specific location was considered to have been where infection occurred. With the aim to use genomic epidemiology to understand B. pseudomallei transmission and infecting scenarios. Environmental sampling was performed at 98 DPMS patient sites, where we collected 975 environmental samples (742 soil; 233 water). Genotyping matched the clinical and epidemiologically linked environmental B. pseudomallei for 19 patients (19%), with the environmental isolates cultured from soil (n=11) or water (n=8) sources. B. pseudomallei isolates from patients and their local environments that matched on genotyping were whole genome sequenced (WGS). Of the 19 patients with a clinical-environmental genotype match, 17 pairs clustered on a Darwin core genome single-nucleotide polymorphism (SNP) phylogeny, later confirmed by single ST phylogenies and pairwise comparative genomics. When related back to patient clinical scenarios, the matched clinical and environmental B. pseudomallei pairs informed likely modes of infection: percutaneous inoculation, inhalation, and ingestion. Targeted environmental sampling for B. pseudomallei can inform infecting scenarios for melioidosis and dangerous occupational and recreational activities and identify hot spots of B. pseudomallei presence. However, WGS and careful genomics are required to avoid overcalling the relatedness between clinical and environmental isolates of B. pseudomallei.
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Chowdhury S, Barai L, Afroze SR, Ghosh PK, Afroz F, Rahman H, Ghosh S, Hossain MB, Rahman MZ, Das P, Rahim MA. The Epidemiology of Melioidosis and Its Association with Diabetes Mellitus: A Systematic Review and Meta-Analysis. Pathogens 2022; 11:pathogens11020149. [PMID: 35215093 PMCID: PMC8878808 DOI: 10.3390/pathogens11020149] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/05/2022] [Accepted: 01/18/2022] [Indexed: 12/21/2022] Open
Abstract
Melioidosis is an under-recognized fatal disease in humans, caused by the Gram-negative bacterium Burkholderia pseudomallei. Globally, more than 35,000 human melioidosis cases have been reported since 1911. Soil acts as the natural reservoir of B. pseudomallei. Humans may become infected by this pathogen through direct contact with contaminated soil and/or water. Melioidosis commonly occurs in patients with diabetes mellitus, who increase the occurrence of melioidosis in a population. We carried out a systematic review and meta-analysis to investigate to what extent diabetes mellitus affects the patient in getting melioidosis. We selected 39 articles for meta-analysis. This extensive review also provided the latest updates on the global distribution, clinical manifestation, preexisting underlying diseases, and risk factors of melioidosis. Diabetes mellitus was identified as the predominant predisposing factor for melioidosis in humans. The overall proportion of melioidosis cases having diabetes was 45.68% (95% CI: 44.8-46.57, p < 0.001). Patients with diabetes mellitus were three times more likely to develop melioidosis than patients with no diabetes (RR 3.40, 95% CI: 2.92-3.87, p < 0.001). The other potential risk factors included old age, exposure to soil and water, preexisting underlying diseases (chronic kidney disease, lung disease, heart disease, and thalassemia), and agricultural activities. Evidence-based clinical practice guidelines for melioidosis in patients with diabetes mellitus may be developed and shared with healthcare professionals of melioidosis endemic countries to reduce morbidity.
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Affiliation(s)
- Sukanta Chowdhury
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh; (P.K.G.); (H.R.); (S.G.); (M.Z.R.)
- Correspondence:
| | - Lovely Barai
- Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM) General Hospital, Dhaka 1000, Bangladesh; (L.B.); (S.R.A.); (F.A.); (M.A.R.)
| | - Samira Rahat Afroze
- Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM) General Hospital, Dhaka 1000, Bangladesh; (L.B.); (S.R.A.); (F.A.); (M.A.R.)
| | - Probir Kumar Ghosh
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh; (P.K.G.); (H.R.); (S.G.); (M.Z.R.)
| | - Farhana Afroz
- Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM) General Hospital, Dhaka 1000, Bangladesh; (L.B.); (S.R.A.); (F.A.); (M.A.R.)
| | - Habibur Rahman
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh; (P.K.G.); (H.R.); (S.G.); (M.Z.R.)
| | - Sumon Ghosh
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh; (P.K.G.); (H.R.); (S.G.); (M.Z.R.)
| | - Muhammad Belal Hossain
- Department of Ecology & Evolutionary Biology, The University of Tennessee, Knoxville, TN 37996, USA;
| | - Mohammed Ziaur Rahman
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh; (P.K.G.); (H.R.); (S.G.); (M.Z.R.)
| | - Pritimoy Das
- School of Health, Federation University Australia, Ballarat, VIC 3353, Australia;
| | - Muhammad Abdur Rahim
- Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM) General Hospital, Dhaka 1000, Bangladesh; (L.B.); (S.R.A.); (F.A.); (M.A.R.)
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22
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Zheng H, Qin J, Chen H, Hu H, Zhang X, Yang C, Wu Y, Li Y, Li S, Kuang H, Zhou H, Shen D, Song K, Song Y, Zhao T, Yang R, Tan Y, Cui Y. Genetic diversity and transmission patterns of Burkholderia pseudomallei on Hainan island, China, revealed by a population genomics analysis. Microb Genom 2021; 7. [PMID: 34762026 PMCID: PMC8743561 DOI: 10.1099/mgen.0.000659] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Burkholderia pseudomallei is a Gram-negative soil-dwelling bacillus that causes melioidosis, a frequently fatal infectious disease, in tropical and subtropical regions. Previous studies have identified the overall genetic and evolutionary characteristics of B. pseudomallei on a global scale, including its origin and transmission routes. However, beyond its known hyperendemicity foci in northern Australia and Southeast Asia, the distribution and genetic characteristics of B. pseudomallei in most tropical regions remain poorly understood, including in southern China. Here, we sequenced the genomes of 122 B. pseudomallei strains collected from Hainan, an island in southern China, in 2002–2018, to investigate the population structure, relationships with global strains, local epidemiology, and virulence and antimicrobial-resistance factors. A phylogenetic analysis and hierarchical clustering divided the Hainan strains into nine phylogenic groups (PGs), 80 % of which were concentrated within five major groups (group 1: corresponding to minor sequence types [STs], 12.3 %; group 3: ST46 and ST50, 31.1 %; group 9: ST58, 13.1 %; group 11: ST55, 8.2 %; group 15: mainly ST658, 15.6%). A phylogenetic analysis that included global strains suggested that B. pseudomallei in Hainan originated from Southeast Asian countries, transmitted in multiple historical importation events. We also identified several mutual transmission events between Hainan and Southeast Asian countries in recent years, including three importation events from Thailand and Singapore to Hainan and three exportation events from Hainan to Singapore, Malaysia, and Taiwan island. A statistical analysis of the temporal distribution showed that the Hainan strains of groups 3, 9, and 15 have dominated the disease epidemic locally in the last 5 years. The spatial distribution of the Hainan strains demonstrated that some PGs are distributed in different cities on Hainan island, and by combining phylogenic and geographic distribution information, we detected 21 between-city transmission events, indicating its frequent local transmission. The detection of virulence factor genes showed that 56 % of the Hainan strains in group 1 encode a B. pseudomallei-specific adherence factor, boaB, confirming the specific pathogenic characteristics of the Hainan strains in group 1. An analysis of the antimicrobial-resistance potential of B. pseudomallei showed that various kinds of alterations were identified in clinically relevant antibiotic resistance factors, such as AmrR, PenA and PBP3, etc. Our results clarify the population structure, local epidemiology, and pathogenic characteristics of B. pseudomallei in Hainan, providing further insight into its regional and global transmission networks and improving our knowledge of its global phylogeography.
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Affiliation(s)
- Hongyuan Zheng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Jingliang Qin
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China.,School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui Province, 230032, PR China
| | - Hai Chen
- Department of Clinical Laboratory, Sanya People's Hospital, Sanya, Hainan Province, 572000, PR China
| | - Hongyan Hu
- Department of Laboratory Medicine, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan Province, 572000, PR China
| | - Xianglilan Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Chao Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Yarong Wu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Yuanli Li
- Department of Clinical Laboratory, Sanya People's Hospital, Sanya, Hainan Province, 572000, PR China
| | - Sha Li
- Department of Clinical Laboratory, Sanya People's Hospital, Sanya, Hainan Province, 572000, PR China
| | - Huihui Kuang
- Department of Laboratory Medicine, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan Province, 572000, PR China
| | - Hanwang Zhou
- Department of Laboratory Medicine, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan Province, 572000, PR China
| | - Dingxia Shen
- Department of Laboratory Medicine, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan Province, 572000, PR China
| | - Kai Song
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Yajun Song
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Tongyan Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Ruifu Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Yafang Tan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China
| | - Yujun Cui
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, PR China.,School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui Province, 230032, PR China
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Gassiep I, Ganeshalingam V, Chatfield MD, Harris PNA, Norton RE. The epidemiology of melioidosis in Townsville, Australia. Trans R Soc Trop Med Hyg 2021; 116:328-335. [PMID: 34370844 DOI: 10.1093/trstmh/trab125] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 07/10/2021] [Accepted: 07/27/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Melioidosis in an infection caused by Burkholderia pseudomallei, an organism endemic to tropical and subtropical regions. METHODS This study describes the epidemiology of melioidosis in Townsville, QLD, Australia, as well as clinical features, risk factors associated with the disease, the burden of infection on the Aboriginal and Torres Strait Islander (ATSI) community and patient outcomes over time. RESULTS From 1997 to 2020, 128 patients were admitted to Townsville University Hospital. The total annual incidence of infection was 3.2 cases per 100 000 compared with 15.3 per 100 000 in the ATSI population. The majority of cases (n=82 [64%]) were male. Alcohol excess (55%) and diabetes mellitus (48%) were the most common risk factors. Bacteraemia occurred in 87 (70%) patients and pneumonia was the most common focus of infection in 84 (69%). The case fatality rate was 23%, with no difference for the ATSI population (6/32 [19%]). The presence of malignancy was the risk factor most associated with mortality (relative risk 2.7 [95% confidence interval 1.4-5.1], p=0.005). CONCLUSIONS The ATSI community was overrepresented in this study, however, there was no significant difference in adverse outcomes. The case fatality rate was higher than in other regions in Australia. This discrepancy may relate in part to the different risk groups seen in these settings coupled with potential organism variability.
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Affiliation(s)
- Ian Gassiep
- University of Queensland Centre for Clinical Research, Royal Brisbane and Woman's Hospital, Herston, QLD 4029, Australia.,Department of Infectious Diseases, Mater Hospital Brisbane, South Brisbane, QLD 4101, Australia
| | | | - Mark D Chatfield
- University of Queensland Centre for Clinical Research, Royal Brisbane and Woman's Hospital, Herston, QLD 4029, Australia
| | - Patrick N A Harris
- University of Queensland Centre for Clinical Research, Royal Brisbane and Woman's Hospital, Herston, QLD 4029, Australia.,Pathology Queensland, Royal Brisbane & Women's Hospital, Herston, QLD 4029, Australia
| | - Robert E Norton
- Pathology Queensland, Townsville University Hospital, Townsville, QLD 4814, Australia.,Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
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Currie BJ, Mayo M, Ward LM, Kaestli M, Meumann EM, Webb JR, Woerle C, Baird RW, Price RN, Marshall CS, Ralph AP, Spencer E, Davies J, Huffam SE, Janson S, Lynar S, Markey P, Krause VL, Anstey NM. The Darwin Prospective Melioidosis Study: a 30-year prospective, observational investigation. THE LANCET. INFECTIOUS DISEASES 2021; 21:1737-1746. [PMID: 34303419 DOI: 10.1016/s1473-3099(21)00022-0] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 12/14/2020] [Accepted: 01/11/2021] [Indexed: 01/23/2023]
Abstract
BACKGROUND The global distribution of melioidosis is under considerable scrutiny, with both unmasking of endemic disease in African and Pacific nations and evidence of more recent dispersal in the Americas. Because of the high incidence of disease in tropical northern Australia, The Darwin Prospective Melioidosis Study commenced in October, 1989. We present epidemiology, clinical features, outcomes, and bacterial genomics from this 30-year study, highlighting changes in the past decade. METHODS The present study was a prospective analysis of epidemiological, clinical, and laboratory data for all culture-confirmed melioidosis cases from the tropical Northern Territory of Australia from Oct 1, 1989, until Sept 30, 2019. Cases were identified on the basis of culture-confirmed melioidosis, a laboratory-notifiable disease in the Northern Territory of Australia. Patients who were culture-positive were included in the study. Multivariable analysis determined predictors of clinical presentations and outcome. Incidence, survival, and cluster analyses were facilitated by population and rainfall data and genotyping of Burkholderia pseudomallei, including multilocus sequence typing and whole-genome sequencing. FINDINGS There were 1148 individuals with culture-confirmed melioidosis, of whom 133 (12%) died. Median age was 50 years (IQR 38-60), 48 (4%) study participants were children younger than 15 years of age, 721 (63%) were male individuals, and 600 (52%) Indigenous Australians. All but 186 (16%) had clinical risk factors, 513 (45%) had diabetes, and 455 (40%) hazardous alcohol use. Only three (2%) of 133 fatalities had no identified risk. Pneumonia was the most common presentation occurring in 595 (52%) patients. Bacteraemia occurred in 633 (56%) of 1135 patients, septic shock in 240 (21%) patients, and 180 (16%) patients required mechanical ventilation. Cases correlated with rainfall, with 80% of infections occurring during the wet season (November to April). Median annual incidence was 20·5 cases per 100 000 people; the highest annual incidence in Indigenous Australians was 103·6 per 100 000 in 2011-12. Over the 30 years, annual incidences increased, as did the proportion of patients with diabetes, although mortality decreased to 17 (6%) of 278 patients over the past 5 years. Genotyping of B pseudomallei confirmed case clusters linked to environmental sources and defined evolving and new sequence types. INTERPRETATION Melioidosis is an opportunistic infection with a diverse spectrum of clinical presentations and severity. With early diagnosis, specific antimicrobial therapy, and state-of-the-art intensive care, mortality can be reduced to less than 10%. However, mortality remains much higher in the many endemic regions where health resources remain scarce. Genotyping of B pseudomallei informs evolving local and global epidemiology. FUNDING The Australian National Health and Medical Research Council.
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Affiliation(s)
- Bart J Currie
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia.
| | - Mark Mayo
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Linda M Ward
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Mirjam Kaestli
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Ella M Meumann
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Jessica R Webb
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Celeste Woerle
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Robert W Baird
- Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia; Pathology Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Ric N Price
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Catherine S Marshall
- Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Anna P Ralph
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Emma Spencer
- Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Jane Davies
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Sarah E Huffam
- Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Sonja Janson
- Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Sarah Lynar
- Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
| | - Peter Markey
- Centre for Disease Control, Top End Health Services, Northern Territory Department of Health, Darwin, NT, Australia
| | - Vicki L Krause
- Centre for Disease Control, Top End Health Services, Northern Territory Department of Health, Darwin, NT, Australia
| | - Nicholas M Anstey
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Infectious Diseases Department, Royal Darwin Hospital and Northern Territory Medical Programme, Darwin, NT, Australia
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Meumann EM, Kaestli M, Mayo M, Ward L, Rachlin A, Webb JR, Kleinecke M, Price EP, Currie BJ. Emergence of Burkholderia pseudomallei Sequence Type 562, Northern Australia. Emerg Infect Dis 2021; 27:1057-1067. [PMID: 33754984 PMCID: PMC8007296 DOI: 10.3201/eid2704.202716] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Since 2005, the range of Burkholderia pseudomallei sequence type 562 (ST562) has expanded in northern Australia. During 2005–2019, ST562 caused melioidosis in 61 humans and 3 animals. Cases initially occurred in suburbs surrounding a creek before spreading across urban Darwin, Australia and a nearby island community. In urban Darwin, ST562 caused 12% (53/440) of melioidosis cases, a proportion that increased during the study period. We analyzed 2 clusters of cases with epidemiologic links and used genomic analysis to identify previously unassociated cases. We found that ST562 isolates from Hainan Province, China, and Pingtung County, Taiwan, were distantly related to ST562 strains from Australia. Temporal genomic analysis suggested a single ST562 introduction into the Darwin region in ≈1988. The origin and transmission mode of ST562 into Australia remain uncertain.
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Grund ME, Choi Soo J, Cote CK, Berisio R, Lukomski S. Thinking Outside the Bug: Targeting Outer Membrane Proteins for Burkholderia Vaccines. Cells 2021; 10:cells10030495. [PMID: 33668922 PMCID: PMC7996558 DOI: 10.3390/cells10030495] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/18/2021] [Accepted: 02/22/2021] [Indexed: 12/16/2022] Open
Abstract
Increasing antimicrobial resistance due to misuse and overuse of antimicrobials, as well as a lack of new and innovative antibiotics in development has become an alarming global threat. Preventative therapeutics, like vaccines, are combative measures that aim to stop infections at the source, thereby decreasing the overall use of antibiotics. Infections due to Gram-negative pathogens pose a significant treatment challenge because of substantial multidrug resistance that is acquired and spread throughout the bacterial population. Burkholderia spp. are Gram-negative intrinsically resistant bacteria that are responsible for environmental and nosocomial infections. The Burkholderia cepacia complex are respiratory pathogens that primarily infect immunocompromised and cystic fibrosis patients, and are acquired through contaminated products and equipment, or via patient-to-patient transmission. The Burkholderia pseudomallei complex causes percutaneous wound, cardiovascular, and respiratory infections. Transmission occurs through direct exposure to contaminated water, water-vapors, or soil, leading to the human disease melioidosis, or the equine disease glanders. Currently there is no licensed vaccine against any Burkholderia pathogen. This review will discuss Burkholderia vaccine candidates derived from outer membrane proteins, OmpA, OmpW, Omp85, and Bucl8, encompassing their structures, conservation, and vaccine formulation.
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Affiliation(s)
- Megan E. Grund
- Department of Microbiology, Immunology and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV 26506, USA; (M.E.G.); (S.J.C.)
| | - Jeon Choi Soo
- Department of Microbiology, Immunology and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV 26506, USA; (M.E.G.); (S.J.C.)
| | - Christopher K. Cote
- Bacteriology Division, The United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Frederick, MD 21702, USA;
| | - Rita Berisio
- Institute of Biostructures and Bioimaging, National Research Council (CNR-IBB), 80145 Naples, Italy;
| | - Slawomir Lukomski
- Department of Microbiology, Immunology and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV 26506, USA; (M.E.G.); (S.J.C.)
- Correspondence: ; Tel.: +1-304-293-6405
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Schuit M, Gardner S, Taylor J, Dabisch P. Evaluation of four sampling devices for Burkholderia pseudomallei laboratory aerosol studies. PLoS Negl Trop Dis 2021; 15:e0009001. [PMID: 33524051 PMCID: PMC7850477 DOI: 10.1371/journal.pntd.0009001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 11/21/2020] [Indexed: 11/18/2022] Open
Abstract
Previous field and laboratory studies investigating airborne Burkholderia pseudomallei have used a variety of different aerosol samplers to detect and quantify concentrations of the bacteria in aerosols. However, the performance of aerosol samplers can vary in their ability to preserve the viability of collected microorganisms, depending on the resistance of the organisms to impaction, desiccation, or other stresses associated with the sampling process. Consequently, sampler selection is critical to maximizing the probability of detecting viable microorganisms in collected air samples in field studies and for accurate determination of aerosol concentrations in laboratory studies. To inform such decisions, the present study assessed the performance of four laboratory aerosol samplers, specifically the all-glass impinger (AGI), gelatin filter, midget impinger, and Mercer cascade impactor, for collecting aerosols containing B. pseudomallei generated from suspensions in two types of culture media. The results suggest that the relative performance of the sampling devices is dependent on the suspension medium utilized for aerosolization. Performance across the four samplers was similar for aerosols generated from suspensions supplemented with 4% glycerol. However, for aerosols generated from suspensions without glycerol, use of the filter sampler or an impactor resulted in significantly lower estimates of the viable aerosol concentration than those obtained with either the AGI or midget impinger. These results demonstrate that sampler selection has the potential to affect estimation of doses in inhalational animal models of melioidosis, as well as the likelihood of detection of viable B. pseudomallei in the environment, and will be useful to inform design of future laboratory and field studies.
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Affiliation(s)
- Michael Schuit
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
- School of Systems Biology, George Mason University, Manassas, Virginia, United States of America
| | - Sierra Gardner
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
| | - Jill Taylor
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
| | - Paul Dabisch
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
- School of Systems Biology, George Mason University, Manassas, Virginia, United States of America
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A Persisting Nontropical Focus of Burkholderia pseudomallei with Limited Genome Evolution over Five Decades. mSystems 2020; 5:5/6/e00726-20. [PMID: 33172968 PMCID: PMC7657595 DOI: 10.1128/msystems.00726-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Burkholderia pseudomallei is predominantly a tropical pathogen uncommonly found in the environment of temperate climatic regions. It is unclear if introduction into temperate regions is sporadic and temporary or if B. pseudomallei can persist in such environments. B. pseudomallei was identified in the environment of southwest Western Australia with melioidosis cases between 1966 and 1991. We report a new cluster with 23 animal fatalities in the same region from 2017, with B. pseudomallei again being recovered from the environment. Comparison of the isolates from the first and second clusters using genomics revealed a single sequence type, high clonality, and limited recombination, even though the time of recovery of the isolates spanned 51 years. This is a major contrast to the extensive genomic diversity seen in the tropics. Our data support the suggestion that B. pseudomallei has the ability to persist in nontropical environments, potentially in a latent state, and has the ability to activate following favorable conditions (rainfall) and then infect animals and humans. Burkholderia pseudomallei is the causative agent of the high-mortality disease melioidosis. Although melioidosis is classified as a tropical disease, rare autochthonous cases have been reported from temperate climatic regions, with uncertainty as to whether B. pseudomallei is persistent in the local environment and whether specific genetic mechanisms facilitate the survival of B. pseudomallei outside the tropics. Sporadic cases of melioidosis occurred in a valley region (latitude 31.6°S) in southwest Western Australia, Australia, between 1966 and 1992. We report a new melioidosis cluster in the same region following high rainfall in January 2017. More than 20 animals died, and B. pseudomallei was isolated from four alpacas, a parrot, and three environmental samples taken from the farm where the alpacas resided. Epidemiological data and genomics revealed that two locations on the farm were the probable sources of the alpaca infections. We determined that B. pseudomallei isolates from the 2017 cluster belonged to sequence type 284 (ST-284), as did all isolates recovered from 1966 to 1992. Genomic analysis confirmed that the ST-284 isolates were clonal and contained conserved genomic islands and limited evidence of recombination. We identified protein-coding regions unique to these isolates that might influence the persistence of B. pseudomallei in this temperate region. We demonstrate the environmental persistence of B. pseudomallei in a temperate region for over 50 years, with limited genetic changes suggesting a latent state and with activation, potential aerosolization, and local dispersal following unusually high rainfall. IMPORTANCEBurkholderia pseudomallei is predominantly a tropical pathogen uncommonly found in the environment of temperate climatic regions. It is unclear if introduction into temperate regions is sporadic and temporary or if B. pseudomallei can persist in such environments. B. pseudomallei was identified in the environment of southwest Western Australia with melioidosis cases between 1966 and 1991. We report a new cluster with 23 animal fatalities in the same region from 2017, with B. pseudomallei again being recovered from the environment. Comparison of the isolates from the first and second clusters using genomics revealed a single sequence type, high clonality, and limited recombination, even though the time of recovery of the isolates spanned 51 years. This is a major contrast to the extensive genomic diversity seen in the tropics. Our data support the suggestion that B. pseudomallei has the ability to persist in nontropical environments, potentially in a latent state, and has the ability to activate following favorable conditions (rainfall) and then infect animals and humans.
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Testamenti VA, Surya M, Saepuloh U, Iskandriati D, Tandang MV, Kristina L, Wahyudi AT, Sajuthi D, Santi VD, Patispathika FH, Wahyu M, Nurcahyo A, Pamungkas J. Characterization of Burkholderia pseudomallei from spontaneous melioidosis in a Bornean orangutan. Vet World 2020; 13:2459-2468. [PMID: 33363342 PMCID: PMC7750211 DOI: 10.14202/vetworld.2020.2459-2468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 10/13/2020] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND AND AIM Melioidosis is a potentially fatal disease affecting humans and a wide range of animal species; it is often underdiagnosed and underreported in veterinary medicine in Indonesia. This study aimed to characterize morphological and molecular features of Burkholderia pseudomallei, the causative agent of melioidosis which caused the death of a Bornean orangutan. MATERIALS AND METHODS Pulmonary abscess samples were cultured on several types of media, including Ashdown agar, Ashdown broth, and MacConkey agar. Type three secretion system orf 2 real-time polymerase chain reaction (PCR) and latex agglutination tests were performed to identify the bacteria. Morphological characteristics were compared to all previously published morphotypes. Subsequently, the bacteria were characterized by multilocus sequence typing (MLST) and Yersinia-like flagellum/Burkholderia thailandensis-like flagellum and chemotaxis PCR. The results of the genotyping were afterward compared to all genotypes from Southeast Asia. RESULTS Multiple morphotypes of B. pseudomallei were perceived during the growth on Ashdown agar. Furthermore, it was identified by MLST that the Type I and Type II morphotypes observed in this study were clones of a single ST, ST54, which is predominantly found in humans and the environment in Malaysia and Thailand, although a very limited number of reports was published in association with animals. Moreover, the E-BURST analysis showed that the ST is grouped together with isolates from Southeast Asian countries, including Malaysia, Thailand, Singapore, and Cambodia. ST54 was predicted to be the founding genotype of several STs from those regions. CONCLUSION B. pseudomallei ST54 that caused the death of a Bornean orangutan has a distant genetic relationship with other STs which were previously reported in Indonesia, implying a vast genetic diversity in Indonesia that has not been discovered yet.
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Affiliation(s)
| | - Maryati Surya
- Primate Research Center, IPB University, Bogor 16128, Indonesia
| | - Uus Saepuloh
- Primate Research Center, IPB University, Bogor 16128, Indonesia
| | - Diah Iskandriati
- Primatology Graduate Study Program, Graduate School of IPB University, Bogor 16128, Indonesia
- Primate Research Center, IPB University, Bogor 16128, Indonesia
| | | | - Lia Kristina
- Borneo Orangutan Survival Foundation, Bogor 16128, Indonesia
| | - Aris Tri Wahyudi
- Department of Biology, Faculty of Mathematics and Natural Sciences, IPB University, Bogor 16680, Indonesia
| | - Dondin Sajuthi
- Primatology Graduate Study Program, Graduate School of IPB University, Bogor 16128, Indonesia
- Primate Research Center, IPB University, Bogor 16128, Indonesia
- Department of Clinics, Reproduction, and Pathology, Faculty of Veterinary Medicine, IPB University, Bogor 16680, Indonesia
| | - Vivi Dwi Santi
- Borneo Orangutan Survival Foundation, Bogor 16128, Indonesia
| | | | - Muhtadin Wahyu
- Borneo Orangutan Survival Foundation, Bogor 16128, Indonesia
| | - Anton Nurcahyo
- Borneo Orangutan Survival Foundation, Bogor 16128, Indonesia
| | - Joko Pamungkas
- Primatology Graduate Study Program, Graduate School of IPB University, Bogor 16128, Indonesia
- Primate Research Center, IPB University, Bogor 16128, Indonesia
- Department of Animal Infectious Diseases and Veterinary Public Health, Faculty of Veterinary Medicine, IPB University, Bogor 16680, Indonesia
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30
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Ferraresso J, Lawton B, Bayliss S, Sheppard S, Cardazzo B, Gaze W, Buckling A, Vos M. Determining the prevalence, identity and possible origin of bacterial pathogens in soil. Environ Microbiol 2020; 22:5327-5340. [PMID: 32990385 DOI: 10.1111/1462-2920.15243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/15/2020] [Accepted: 09/17/2020] [Indexed: 12/13/2022]
Abstract
Soil biomes are vast, exceptionally diverse and crucial to the health of ecosystems and societies. Soils also contain an appreciable, but understudied, diversity of opportunistic human pathogens. With climate change and other forms of environmental degradation potentially increasing exposure risks to soilborne pathogens, it is necessary to gain a better understanding of their ecological drivers. Here we use the Galleria mellonella insect virulence model to selectively isolate pathogenic bacteria from soils in Cornwall (UK). We find a high prevalence of pathogenic soil bacteria with two genera, Providencia and Serratia, being especially common. Providencia alcalifaciens, P. rustigianii, Serratia liquefaciens and S. plymuthica strains were studied in more detail using phenotypic virulence and antibiotic resistance assays and whole-genome sequencing. Both genera displayed low levels of antibiotic resistance and antibiotic resistance gene carriage. However, Serratia isolates were found to carry the recently characterized metallo-β-lactamase blaSPR-1 that, although not conferring high levels of resistance in these strains, poses a potential risk of horizontal transfer to other pathogens where it could be fully functional. The Galleria assay can be a useful approach to uncover the distribution and identity of pathogenic bacteria in the environment, as well as uncover resistance genes with an environmental origin.
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Affiliation(s)
- Jacopo Ferraresso
- European Centre for Environment and Human Health, Environment and Sustainability Institute, University of Exeter Medical School, Exeter, UK.,Department of Comparative Biomedicine and Food Science, University of Padova, Bologna, Italy
| | - Benedict Lawton
- European Centre for Environment and Human Health, Environment and Sustainability Institute, University of Exeter Medical School, Exeter, UK
| | - Sion Bayliss
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, UK
| | - Samuel Sheppard
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, UK
| | - Barbara Cardazzo
- Department of Comparative Biomedicine and Food Science, University of Padova, Bologna, Italy
| | - Will Gaze
- European Centre for Environment and Human Health, Environment and Sustainability Institute, University of Exeter Medical School, Exeter, UK
| | - Angus Buckling
- Department of Biosciences, University of Exeter, Exeter, UK
| | - Michiel Vos
- European Centre for Environment and Human Health, Environment and Sustainability Institute, University of Exeter Medical School, Exeter, UK
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Norris MH, Tran HTT, Walker MA, Bluhm AP, Zincke D, Trung TT, Thi NV, Thi NP, Schweizer HP, Unger F, Blackburn JK, Hang NTT. Distribution of Serological Response to Burkholderia pseudomallei in Swine from Three Provinces of Vietnam. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17145203. [PMID: 32708490 PMCID: PMC7399857 DOI: 10.3390/ijerph17145203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/09/2020] [Accepted: 07/16/2020] [Indexed: 01/18/2023]
Abstract
(1) Background: Burkholderia pseudomallei is an environmentally mediated saprophytic pathogen that can cause severe disease in humans. It is well known that B. pseudomallei survives in tropical moist soil environments worldwide, but melioidosis is gaining recognition as a public and veterinary health issue in Vietnam. The contribution of animals to human disease is unknown, necessitating further investigation. (2) Methods: Swine sera were collected from two populations, one grazing and one commercially farmed, from three provinces in Vietnam. ELISAs utilizing B. pseudomallei capsular polysaccharide (CPS), outer polysaccharide (OPS), and Hcp1 protein were used to screen serum samples. Positive samples were mapped to the commune level. Seroprevalence calculations and pig population estimates were used to approximate number of swine exposures per commune. (3) Results: Grazing pigs from Hoa Binh had significantly higher seropositivity levels (11.4%, 95% CI: 9.7–13.1) compared to farmed pigs from Ha Tinh and Nghe An (4%, 95% CI: 3.3–4.7). Average swine seropositivity rates were ~6.3% (95% CI: 5–7.9), higher than previously identified in Vietnam (~0.88%). (4) Conclusions: Initial serological sampling identified a significant number of seropositive and potential melioidosis infections occurring in swine in Vietnam. This work is a critical step in understanding the role swine may play in the epidemiology of human melioidosis in Vietnam.
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Affiliation(s)
- Michael H. Norris
- Spatial Epidemiology and Ecology Research Lab, Department of Geography, University of Florida, Gainesville, FL 32611, USA; (M.A.W.); (A.P.B.); (D.Z.); (J.K.B.)
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA;
- Correspondence:
| | - Hang Thi Thu Tran
- National Institute of Veterinary Research, Hanoi 10000, Vietnam; (H.T.T.T.); (N.V.T.); (N.P.T.); (N.T.T.H.)
| | - Morgan A. Walker
- Spatial Epidemiology and Ecology Research Lab, Department of Geography, University of Florida, Gainesville, FL 32611, USA; (M.A.W.); (A.P.B.); (D.Z.); (J.K.B.)
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA;
| | - Andrew P. Bluhm
- Spatial Epidemiology and Ecology Research Lab, Department of Geography, University of Florida, Gainesville, FL 32611, USA; (M.A.W.); (A.P.B.); (D.Z.); (J.K.B.)
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA;
| | - Diansy Zincke
- Spatial Epidemiology and Ecology Research Lab, Department of Geography, University of Florida, Gainesville, FL 32611, USA; (M.A.W.); (A.P.B.); (D.Z.); (J.K.B.)
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA;
| | - Trinh Thanh Trung
- VNU-Institute of Microbiology and Biotechnology, Vietnam National University, Hanoi 10000, Vietnam;
| | - Nga Vu Thi
- National Institute of Veterinary Research, Hanoi 10000, Vietnam; (H.T.T.T.); (N.V.T.); (N.P.T.); (N.T.T.H.)
| | - Ngoc Pham Thi
- National Institute of Veterinary Research, Hanoi 10000, Vietnam; (H.T.T.T.); (N.V.T.); (N.P.T.); (N.T.T.H.)
| | - Herbert P. Schweizer
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA;
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, FL 32611, USA
| | - Fred Unger
- International Livestock Research Institute, Hanoi 10000, Vietnam;
| | - Jason K. Blackburn
- Spatial Epidemiology and Ecology Research Lab, Department of Geography, University of Florida, Gainesville, FL 32611, USA; (M.A.W.); (A.P.B.); (D.Z.); (J.K.B.)
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA;
| | - Nguyen Thi Thu Hang
- National Institute of Veterinary Research, Hanoi 10000, Vietnam; (H.T.T.T.); (N.V.T.); (N.P.T.); (N.T.T.H.)
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Chen YL, Hsu DW, Hsueh PT, Chen JA, Shih PJ, Lee S, Lin HH, Chen YS. Distinct Pathogenic Patterns of Burkholderia pseudomallei Isolates Selected from Caenorhabditis elegans and Dictyostelium discoideum Models. Am J Trop Med Hyg 2020; 101:736-745. [PMID: 31392941 DOI: 10.4269/ajtmh.19-0052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Burkholderia pseudomallei is a selective agent that causes septic melioidosis and exhibits a broad range of lethal doses in animals. Host cellular virulence and phagocytic resistance are pathologic keys of B. pseudomallei. We first proposed Caenorhabditis elegans as the host cellular virulence model to mimic bacterial virulence against mammals and second established the resistance of B. pseudomallei to predation by Dictyostelium discoideum as the phagocytosis model. The saprophytic sepsis-causing Burkholderia sp. (B. pseudomallei, Burkholderia thailandensis, Burkholderia cenocepacia, and Burkholderia multivorans) exhibited different virulence patterns in both simple models, but B. pseudomallei was the most toxic. Using both models, attenuated isolates of B. pseudomallei were selected from a transposon-mutant library and a panel of environmental isolates and reconfirmed by in vitro mouse peritoneal exudate cell association and invasion assays. The distinct pathological patterns of melioidosis were inducted by different selected B. pseudomallei isolates. Fatal melioidosis was induced by the isolates with high virulence in both simple models within 4-5 day, whereas the low-virulence isolates resulted in prolonged survival greater than 30 day. Infection with the isolates having high resistance to D. discoideum predation but a low C. elegans killing effect led to 83% of mice with neurologic melioidosis. By contrast, infection with the isolates having low resistance to D. discoideum predation but high C. elegans killing effect led to 20% cases with inflammation in the salivary glands. Our results indicated that individual B. pseudomallei isolates selected from simple biological models contribute differently to disease progression and/or tissue tropism.
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Affiliation(s)
- Ya-Lei Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Duen-Wei Hsu
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Pei-Tan Hsueh
- Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Jou-An Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Pei-Jyun Shih
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Susan Lee
- Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Hsi-Hsun Lin
- School of Medicine, Institute of Public Health, National Yang-Ming University, Taipei, Taiwan.,Medical Research Department, General Clinical Research Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yao-Shen Chen
- Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,Department of Internal Medicine, National Yang-Ming University, Taipei, Taiwan
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Abstract
The causative agent of melioidosis, Burkholderia pseudomallei, a tier 1 select agent, is endemic in Southeast Asia and northern Australia, with increased incidence associated with high levels of rainfall. Increasing reports of this condition have occurred worldwide, with estimates of up to 165,000 cases and 89,000 deaths per year. The ecological niche of the organism has yet to be clearly defined, although the organism is associated with soil and water. The culture of appropriate clinical material remains the mainstay of laboratory diagnosis. Identification is best done by phenotypic methods, although mass spectrometric methods have been described. Serology has a limited diagnostic role. Direct molecular and antigen detection methods have limited availability and sensitivity. Clinical presentations of melioidosis range from acute bacteremic pneumonia to disseminated visceral abscesses and localized infections. Transmission is by direct inoculation, inhalation, or ingestion. Risk factors for melioidosis include male sex, diabetes mellitus, alcohol abuse, and immunosuppression. The organism is well adapted to intracellular survival, with numerous virulence mechanisms. Immunity likely requires innate and adaptive responses. The principles of management of this condition are drainage and debridement of infected material and appropriate antimicrobial therapy. Global mortality rates vary between 9% and 70%. Research into vaccine development is ongoing.
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Affiliation(s)
- I Gassiep
- Pathology Queensland, Townsville Hospital, Townsville, Queensland, Australia
- Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
| | - M Armstrong
- Pathology Queensland, Townsville Hospital, Townsville, Queensland, Australia
| | - R Norton
- Pathology Queensland, Townsville Hospital, Townsville, Queensland, Australia
- Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
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The Impact of Age and Sex on Mouse Models of Melioidosis. Pathogens 2020; 9:pathogens9020113. [PMID: 32054106 PMCID: PMC7168040 DOI: 10.3390/pathogens9020113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 01/29/2020] [Accepted: 02/04/2020] [Indexed: 12/15/2022] Open
Abstract
Mouse models have been used to generate critical data for many infectious diseases. In the case of Burkholderia pseudomallei, mouse models have been invaluable for bacterial pathogenesis studies as well as for testing novel medical countermeasures including both vaccines and therapeutics. Mouse models of melioidosis have also provided a possible way forward to better understand the chronicity associated with this infection, as it appears that BALB/c mice develop an acute infection with B. pseudomallei, whereas the C57BL/6 model is potentially more suggestive of a chronic infection. Several unanswered questions, however, persist around this model. In particular, little attention has been paid to the effect of age or sex on the disease outcome in these animal models. In this report, we determined the LD50 of the B. pseudomallei K96243 strain in both female and male BALB/c and C57BL/6 mice in three distinct age groups. Our data demonstrated a modest increase in susceptibility associated with sex in this model, and we documented important histopathological differences associated with the reproductive systems of each sex. There was a statistically significant inverse correlation between age and susceptibility. The older mice, in most cases, were more susceptible to the infection. Additionally, our retrospective analyses suggested that the impact of animal supplier on disease outcome in mice may be minimal. These observations were consistent regardless of whether the mice were injected with bacteria intraperitoneally or if they were exposed to aerosolized bacteria. All of these factors should be considered when designing experiments using mouse models of melioidosis.
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Rizzi MC, Rattanavong S, Bouthasavong L, Seubsanith A, Vongsouvath M, Davong V, De Silvestri A, Manciulli T, Newton PN, Dance DAB. Evaluation of the Active Melioidosis Detect™ test as a point-of-care tool for the early diagnosis of melioidosis: a comparison with culture in Laos. Trans R Soc Trop Med Hyg 2019; 113:757-763. [PMID: 31638152 PMCID: PMC6907004 DOI: 10.1093/trstmh/trz092] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/31/2019] [Accepted: 08/05/2019] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Melioidosis is difficult to diagnose clinically and culture of Burkholderia pseudomallei is the current, imperfect gold standard. However, a reliable point-of-care test (POCT) could enable earlier treatment and improve outcomes. METHODS We evaluated the sensitivity and specificity of the Active Melioidosis Detect™ (AMD) rapid test as a POCT and determined how much it reduced the time to diagnosis compared with culture. RESULTS We tested 106 whole blood, plasma and buffy coat samples, 96 urine, 28 sputum and 20 pus samples from 112 patients, of whom 26 (23.2%) were culture-positive for B. pseudomallei. AMD sensitivity and specificity were 65.4 and 87.2%, respectively, the latter related to 10 weak positive reactions on urine samples, considered likely false positives. The positive predictive value was 60.7%, negative predictive value was 89.3% and concordance rate between operators reading the test was 95.7%; time to diagnosis decreased by a median of 23 h. CONCLUSIONS Our findings confirm that a strongly positive AMD result can reduce the time to diagnosis of melioidosis. However, the AMD currently has a disappointing overall sensitivity, especially with blood fractions, and specificity problems when testing urine samples.
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Affiliation(s)
- Maria Chiara Rizzi
- University of Pavia, Pavia, Italy
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
| | - Sayaphet Rattanavong
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
| | - Latsaniphone Bouthasavong
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
| | - Amphayvanh Seubsanith
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
| | - Manivanh Vongsouvath
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
| | - Viengmon Davong
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
| | | | | | - Paul N Newton
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford OX3 7FZ, UK
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | - David A B Dance
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford OX3 7FZ, UK
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
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Identification of Burkholderia pseudomallei by Use of the Vitek Mass Spectrometer. J Clin Microbiol 2019; 57:JCM.00081-19. [PMID: 30842230 DOI: 10.1128/jcm.00081-19] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 02/27/2019] [Indexed: 02/07/2023] Open
Abstract
Burkholderia pseudomallei is the causative agent of melioidosis. This condition most often presents as pneumonia and bacteremia, with mortality rates of 9% to 70%. Therefore, early identification of this organism may aid in directing appropriate management. This study aimed to use the Vitek matrix-assisted laser desorption ionization-time of flight mass spectrometer to create a spectrum for the rapid identification of B. pseudomallei Spectra from 85 isolate cultures were acquired using the Vitek mass spectrometer research mode. A SuperSpectrum was created using peak matching and subsequently activated for analysis of organism identification. All 85 isolates were correctly identified as B. pseudomallei A total of 899 spectra were analyzed and demonstrated a specificity of 99.8%. Eighty-one clinical isolates were used, of which 10 were neuromelioidosis, and no discernible spectrum difference was appreciated. Spectrum acquisition from a single spot was only successful in 374/899 (41%) of isolates. This increased to 100% when 3 spots of the same extract were analyzed. The Vitek mass spectrometer can be used for the rapid identification of B. pseudomallei with a high level of specificity.
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Bulterys PL, Bulterys MA, Phommasone K, Luangraj M, Mayxay M, Kloprogge S, Miliya T, Vongsouvath M, Newton PN, Phetsouvanh R, French CT, Miller JF, Turner P, Dance DAB. Climatic drivers of melioidosis in Laos and Cambodia: a 16-year case series analysis. Lancet Planet Health 2018; 2:e334-e343. [PMID: 30082048 PMCID: PMC6076299 DOI: 10.1016/s2542-5196(18)30172-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 07/02/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Burkholderia pseudomallei is the cause of melioidosis, a serious and difficult to treat infection that is endemic throughout the tropics. Melioidosis incidence is highly seasonal. We aimed to identify the climatic drivers of infection and to shed light on modes of transmission and potential preventive strategies. METHODS We examined the records of patients diagnosed with melioidosis at the Microbiology Laboratory of Mahosot Hospital in Vientiane, Laos, between October, 1999, and August, 2015, and all patients with culture-confirmed melioidosis presenting to the Angkor Hospital for Children in Siem Reap, Cambodia, between February, 2009, and December, 2013. We also examined local temperature, humidity, precipitation, visibility, and wind data for the corresponding time periods. We estimated the B pseudomallei incubation period by examining profile likelihoods for hypothetical exposure-to-presentation delays. FINDINGS 870 patients were diagnosed with melioidosis in Laos and 173 patients were diagnosed with melioidosis in Cambodia during the study periods. Melioidosis cases were significantly associated with humidity (p<0·0001), low visibility (p<0·0001), and maximum wind speeds (p<0·0001) in Laos, and humidity (p=0·010), rainy days (p=0·015), and maximum wind speed (p=0·0070) in Cambodia. Compared with adults, children were at significantly higher odds of infection during highly humid months (odds ratio 2·79, 95% CI 1·83-4·26). Lung and disseminated infections were more common during windy months. The maximum likelihood estimate of the incubation period was 1 week (95% CI 0-2). INTERPRETATION The results of this study demonstrate a significant seasonal burden of melioidosis among adults and children in Laos and Cambodia. Our findings highlight the risks of infection during highly humid and windy conditions, and suggest a need for increased awareness among at-risk individuals, such as children. FUNDING Wellcome Trust.
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Affiliation(s)
- Philip L Bulterys
- UCLA-Caltech Medical Scientist Training Program, David Geffen School of Medicine, Los Angeles, CA, USA; Molecular Biology Institute, Los Angeles, CA, USA; Department of Microbiology, Immunology, and Molecular Genetics, Los Angeles, CA, USA.
| | | | - Koukeo Phommasone
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Vientiane, Laos
| | - Manophab Luangraj
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Vientiane, Laos
| | - Mayfong Mayxay
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Vientiane, Laos; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK; Faculty of Postgraduate Studies, University of Health Sciences, Ministry of Health, Vientiane, Laos
| | - Sabine Kloprogge
- Cambodia Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, Cambodia
| | - Thyl Miliya
- Cambodia Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, Cambodia
| | | | - Paul N Newton
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Vientiane, Laos; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK; Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Rattanaphone Phetsouvanh
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Vientiane, Laos; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Christopher T French
- Department of Microbiology, Immunology, and Molecular Genetics, Los Angeles, CA, USA; California NanoSystems Institute UCLA, Los Angeles, CA, USA
| | - Jeff F Miller
- Molecular Biology Institute, Los Angeles, CA, USA; Department of Microbiology, Immunology, and Molecular Genetics, Los Angeles, CA, USA; California NanoSystems Institute UCLA, Los Angeles, CA, USA
| | - Paul Turner
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK; Cambodia Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, Cambodia
| | - David A B Dance
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Vientiane, Laos; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK; Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
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38
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Hsueh PT, Huang WT, Hsueh HK, Chen YL, Chen YS. Transmission Modes of Melioidosis in Taiwan. Trop Med Infect Dis 2018; 3:tropicalmed3010026. [PMID: 30274423 PMCID: PMC6136622 DOI: 10.3390/tropicalmed3010026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 02/15/2018] [Accepted: 02/17/2018] [Indexed: 01/17/2023] Open
Abstract
In Taiwan, melioidosis is an emerging disease that suddenly increased in the Er-Ren River Basin, beginning in 2005 and in the Zoynan region during 2008⁻2012, following a typhoon. Additionally, the disease sporadically increased in a geography-dependent manner in 2016. Subcutaneous inoculation, ingestion, and the inhalation of soil or water contaminated with Burkholderia pseudomallei are recognized as the transmission modes of melioidosis. The appearance of environmental B. pseudomallei positivity in northern, central and southern Taiwan is associated with disease prevalence (cases/population: 0.03/100,000 in the northern region, 0.29/100,000 in the central region and 1.98/100,000 in the southern region). However, melioidosis-clustered areas are confined to 5 to 7.5 km² hot spots containing high-density populations, but B. pseudomallei-contaminated environments are located >5 km northwestern of the periphery of these hot spots. The observation that the concentration of B. pseudomallei-specific DNA in aerosols was positively correlated with the incidence of melioidosis and the appearance of a northwesterly wind in a hot spot indicated that airborne transmission had occurred in Taiwan. Moreover, the isolation rate in the superficial layers of a contaminated crop field in the northwest was correlated with PCR positivity in aerosols collected from the southeast over a two-year period. The genotype ST58 was identified by multilocus sequence typing in human and aerosol isolates. The genotype ST1001 has increased in prevalence but has been sporadically distributed elsewhere since 2016. These data indicate the transmission modes and environmental foci that support the dissemination of melioidosis are changing in Taiwan.
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Affiliation(s)
- Pei-Tan Hsueh
- Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan.
| | - Wei-Tien Huang
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung 824, Taiwan.
| | - Hsu-Kai Hsueh
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung 824, Taiwan.
| | - Ya-Lei Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung 824, Taiwan.
| | - Yao-Shen Chen
- Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan.
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Abstract
Burkholderia pseudomallei is a Gram-negative environmental bacterium and the aetiological agent of melioidosis, a life-threatening infection that is estimated to account for ∼89,000 deaths per year worldwide. Diabetes mellitus is a major risk factor for melioidosis, and the global diabetes pandemic could increase the number of fatalities caused by melioidosis. Melioidosis is endemic across tropical areas, especially in southeast Asia and northern Australia. Disease manifestations can range from acute septicaemia to chronic infection, as the facultative intracellular lifestyle and virulence factors of B. pseudomallei promote survival and persistence of the pathogen within a broad range of cells, and the bacteria can manipulate the host's immune responses and signalling pathways to escape surveillance. The majority of patients present with sepsis, but specific clinical presentations and their severity vary depending on the route of bacterial entry (skin penetration, inhalation or ingestion), host immune function and bacterial strain and load. Diagnosis is based on clinical and epidemiological features as well as bacterial culture. Treatment requires long-term intravenous and oral antibiotic courses. Delays in treatment due to difficulties in clinical recognition and laboratory diagnosis often lead to poor outcomes and mortality can exceed 40% in some regions. Research into B. pseudomallei is increasing, owing to the biothreat potential of this pathogen and increasing awareness of the disease and its burden; however, better diagnostic tests are needed to improve early confirmation of diagnosis, which would enable better therapeutic efficacy and survival.
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Affiliation(s)
- W Joost Wiersinga
- Department of Medicine, Division of Infectious Diseases, Academic Medical Center, Meibergdreef 9, Rm. G2-132, 1105 AZ Amsterdam, The Netherlands
- Centre for Experimental and Molecular Medicine, Academic Medical Center, Amsterdam, The Netherlands
| | - Harjeet S Virk
- Centre for Experimental and Molecular Medicine, Academic Medical Center, Amsterdam, The Netherlands
| | - Alfredo G Torres
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Bart J Currie
- Menzies School of Health Research, Charles Darwin University and Royal Darwin Hospital, Darwin, Australia
| | - Sharon J Peacock
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - David A B Dance
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
- Lao-Oxford-Mahosot Hospital Wellcome Trust Research Unit, Vientiane, Lao People's Democratic Republic
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
| | - Direk Limmathurotsakul
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Department of Tropical Hygiene and Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
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40
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Dabisch PA, Xu Z, Boydston JA, Solomon J, Bohannon JK, Yeager JJ, Taylor JR, Reeder RJ, Sayre P, Seidel J, Mollura DJ, Hevey MC, Jahrling PB, Lackemeyer MG. Quantification of regional aerosol deposition patterns as a function of aerodynamic particle size in rhesus macaques using PET/CT imaging. Inhal Toxicol 2017; 29:506-515. [DOI: 10.1080/08958378.2017.1409848] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- P. A. Dabisch
- Battelle National Biodefense Institute for the US Department of Homeland Security, National Biodefense Analysis and Countermeasures Center, Frederick, MD, USA
| | - Z. Xu
- Center for Disease Imaging, Radiology, and Imaging Services, National Institutes of Health, Bethesda, MD, USA
| | - J. A. Boydston
- Battelle National Biodefense Institute for the US Department of Homeland Security, National Biodefense Analysis and Countermeasures Center, Frederick, MD, USA
| | - J. Solomon
- Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research, Inc., NCI Campus at Frederick, Frederick, MD, USA
| | - J. K. Bohannon
- Integrated Research Facility, National Institute of Allergy and Infectious Disease (NIAID), Frederick, MD, USA
| | - J. J. Yeager
- Battelle National Biodefense Institute for the US Department of Homeland Security, National Biodefense Analysis and Countermeasures Center, Frederick, MD, USA
| | - J. R. Taylor
- Battelle National Biodefense Institute for the US Department of Homeland Security, National Biodefense Analysis and Countermeasures Center, Frederick, MD, USA
| | - R. J. Reeder
- Integrated Research Facility, National Institute of Allergy and Infectious Disease (NIAID), Frederick, MD, USA
| | - P. Sayre
- Integrated Research Facility, National Institute of Allergy and Infectious Disease (NIAID), Frederick, MD, USA
| | - J. Seidel
- Integrated Research Facility, National Institute of Allergy and Infectious Disease (NIAID), Frederick, MD, USA
| | - D. J. Mollura
- Center for Disease Imaging, Radiology, and Imaging Services, National Institutes of Health, Bethesda, MD, USA
| | - M. C. Hevey
- Battelle National Biodefense Institute for the US Department of Homeland Security, National Biodefense Analysis and Countermeasures Center, Frederick, MD, USA
| | - P. B. Jahrling
- Integrated Research Facility, National Institute of Allergy and Infectious Disease (NIAID), Frederick, MD, USA
| | - M. G. Lackemeyer
- Integrated Research Facility, National Institute of Allergy and Infectious Disease (NIAID), Frederick, MD, USA
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41
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42
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Ong CEL, Wongsuvan G, Chew JSW, Kim TY, Teng LH, Amornchai P, Wuthiekanun V, Day NPJ, Peacock SJ, Cheng TY, Yap EPH, Limmathurotsakul D. Presence of Burkholderia pseudomallei in Soil and Paddy Rice Water in a Rice Field in Northeast Thailand, but Not in Air and Rainwater. Am J Trop Med Hyg 2017; 97:1702-1705. [PMID: 29016340 PMCID: PMC5805070 DOI: 10.4269/ajtmh.17-0515] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Environmental Burkholderia pseudomallei has been postulated to be aerosolized during ploughing and heavy rain, and could result in inhalational melioidosis. Here, we determined the presence of B. pseudomallei in soil, paddy field water (PFW), air, and rainwater samples in a single rice paddy field in Ubon Ratchathani, northeast Thailand. In 2012, we collected 100 soil samples during the dry season, 10 PFW samples during the monsoon season, 77 air samples during ploughing (N = 31) and heavy rains (N = 46), and 60 rainwater samples during 12 rain events. We found that 32 soil samples (32%), six PFW samples (60%), and none of the air and rainwater samples were culture positive for B. pseudomallei. Other soil bacteria were isolated from air and rainwater samples. Mean quantitative count of B. pseudomallei estimated from two culture-positive PFW samples was 200 colony forming units/mL. Our findings suggest that the risk of melioidosis acquisition by inhalation in Thailand might be low.
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Affiliation(s)
- Catherine E L Ong
- Defence Medical and Environmental Research Institute, DSO National Laboratories, Singapore, Singapore
| | - Gumphol Wongsuvan
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Janet S W Chew
- Defence Medical and Environmental Research Institute, DSO National Laboratories, Singapore, Singapore
| | - Tan Yian Kim
- Defence Medical and Environmental Research Institute, DSO National Laboratories, Singapore, Singapore
| | - Low Hwee Teng
- Defence Medical and Environmental Research Institute, DSO National Laboratories, Singapore, Singapore
| | - Premjit Amornchai
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Vanaporn Wuthiekanun
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Nicholas P J Day
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Sharon J Peacock
- Department of Medicine, Cambridge University, Addenbrooke's Hospital, Cambridge, United Kingdom.,Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Tan Yoke Cheng
- Defence Medical and Environmental Research Institute, DSO National Laboratories, Singapore, Singapore
| | - Eric P H Yap
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Direk Limmathurotsakul
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
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43
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Bandeira TDJPG, Castelo-Branco DDSCM, Rocha MFG, Cordeiro RDA, Ocadaque CJ, Paiva MDAN, Brilhante RSN, Sidrim JJC. Clinical and environmental isolates of Burkholderia pseudomallei from Brazil: Genotyping and detection of virulence gene. ASIAN PAC J TROP MED 2017; 10:945-951. [PMID: 29111189 DOI: 10.1016/j.apjtm.2017.09.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/13/2017] [Accepted: 09/11/2017] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVE To evaluate the genetic diversity of clinical and environmental isolates of Burkholderia pseudomallei (B. pseudomallei) recovered in Ceará, Brazil, and screen these isolates for the presence of type three secretion system virulence gene. METHODS Nineteen B. pseudomallei isolates (9 from clinical cases and 10 from soils) were analyzed. Random amplified polymorphic DNA was performed with primers OPQ-2, OPQ-4 and OPQ-16 to evaluate the genetic diversity, and type three secretion system gene was detected through polymerase chain reaction. RESULTS Random amplified polymorphic DNA showed a genetic relatedness of approximately 50% among the tested B. pseudomallei isolates, which were grouped into two clades, of which the biggest ones comprised 18/19 isolates for primer OPQ-2, and 17/19 isolates for primer OPQ-16. Primer OPQ-4 grouped the isolates into three clades comprising 1/19, 3/19 and 15/19 isolates. Additionally, type three secretion system gene was detected in all tested isolates. CONCLUSIONS This is an effort to type B. pseudomallei strains from Ceará, which is important for better understanding this pathogen, contributing for the epidemiological surveillance of melioidosis in this endemic region.
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Affiliation(s)
- Tereza de Jesus Pinheiro Gomes Bandeira
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil; Christus School of Medicine, Fortaleza, Ceará, Brazil
| | | | - Marcos Fábio Gadelha Rocha
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil; Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Rossana de Aguiar Cordeiro
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Crister José Ocadaque
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Manoel de Araújo Neto Paiva
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil; Federal Institute of Education, Science and Technology of Ceará, Acaraú, Ceará, Brazil
| | - Raimunda Sâmia Nogueira Brilhante
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil.
| | - José Júlio Costa Sidrim
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil
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44
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Bearss JJ, Hunter M, Dankmeyer JL, Fritts KA, Klimko CP, Weaver CH, Shoe JL, Quirk AV, Toothman RG, Webster WM, Fetterer DP, Bozue JA, Worsham PL, Welkos SL, Amemiya K, Cote CK. Characterization of pathogenesis of and immune response to Burkholderia pseudomallei K96243 using both inhalational and intraperitoneal infection models in BALB/c and C57BL/6 mice. PLoS One 2017; 12:e0172627. [PMID: 28235018 PMCID: PMC5325312 DOI: 10.1371/journal.pone.0172627] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 02/07/2017] [Indexed: 01/02/2023] Open
Abstract
Burkholderia pseudomallei, the etiologic agent of melioidosis, is a Gram negative bacterium designated as a Tier 1 threat. This bacterium is known to be endemic in Southeast Asia and Northern Australia and can infect humans and animals by several routes. Inhalational melioidosis has been associated with monsoonal rains in endemic areas and is also a significant concern in the biodefense community. There are currently no effective vaccines for B. pseudomallei and antibiotic treatment can be hampered by non-specific symptomology and also the high rate of naturally occurring antibiotic resistant strains. Well-characterized animal models will be essential when selecting novel medical countermeasures for evaluation prior to human clinical trials. Here, we further characterize differences between the responses of BALB/c and C57BL/6 mice when challenged with low doses of a low-passage and well-defined stock of B. pseudomallei K96243 via either intraperitoneal or aerosol routes of exposure. Before challenge, mice were implanted with a transponder to collect body temperature readings, and daily body weights were also recorded. Mice were euthanized on select days for pathological analyses and determination of the bacterial burden in selected tissues (blood, lungs, liver, and spleen). Additionally, spleen homogenate and sera samples were analyzed to better characterize the host immune response after infection with aerosolized bacteria. These clinical, pathological, and immunological data highlighted and confirmed important similarities and differences between these murine models and exposure routes.
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Affiliation(s)
- Jeremy J. Bearss
- Pathology Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD, United States of America
| | - Melissa Hunter
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Jennifer L. Dankmeyer
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Kristen A. Fritts
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Christopher P. Klimko
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Chris H. Weaver
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Jennifer L. Shoe
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Avery V. Quirk
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Ronald G. Toothman
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Wendy M. Webster
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - David P. Fetterer
- BioStatisitics Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Joel A. Bozue
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Patricia L. Worsham
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Susan L. Welkos
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Kei Amemiya
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
| | - Christopher K. Cote
- Bacteriology Division, USAMRIID, Fort Detrick, Frederick, MD, United States of America
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45
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Wang XM, Zheng X, Wu H, Zhou XJ, Kuang HH, Guo HL, Xu K, Li TJ, Liu LL, Li W. Multilocus Sequence Typing of Clinical Isolates of Burkholderia pseudomallei Collected in Hainan, a Tropical Island of Southern China. Am J Trop Med Hyg 2016; 95:760-764. [PMID: 27430537 PMCID: PMC5062769 DOI: 10.4269/ajtmh.16-0280] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 05/27/2016] [Indexed: 11/07/2022] Open
Abstract
Burkholderia pseudomallei is a gram-negative bacterium that causes melioidosis. In this study, we examined the sequence types (STs) of 60 clinical isolates from patients with melioidosis in Hainan, a tropical island in southern China. The 60 clinical isolates were resolved into 30 STs. Among the STs, ST562 was also reported in Australia, and ST90 was also reported in the United States, probably from a traveler who had previously visited Asia. In addition, six novel STs were found in this study, including ST1395, ST1396, ST1397, ST1398, ST1399, and ST1443, whereas the remaining STs were mostly shared with other southeast Asian regions. Phylogenetic analysis of 60 isolates conducted using the eBURST v3 software segregated the 30 STs into three groups and 18 singletons. Our study shows genetic diversity of 60 clinical isolates of B. pseudomallei in Hainan Island.
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Affiliation(s)
- Xu-Ming Wang
- Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China
| | - Xiao Zheng
- State Key Laboratory for Infectious Disease Prevention and Control, Beijing, People's Republic of China. National Institute for Communicable Disease Control and Prevention, Beijing, People's Republic of China. Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, People's Republic of China
| | - Hua Wu
- Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China
| | - Xiao-Jun Zhou
- Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China
| | - Hui-Hui Kuang
- Hainan Department, The General Hospital of the Chinese People's Liberation Army, Sanya, People's Republic of China
| | - Hong-Li Guo
- Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China
| | - Kai Xu
- Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China
| | - Tian-Jiao Li
- Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China
| | - Ling-Li Liu
- Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China.
| | - Wei Li
- State Key Laboratory for Infectious Disease Prevention and Control, Beijing, People's Republic of China. National Institute for Communicable Disease Control and Prevention, Beijing, People's Republic of China. Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, People's Republic of China.
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46
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Yue S, Ren H, Fan S, Sun Y, Wang Z, Fu P. Springtime precipitation effects on the abundance of fluorescent biological aerosol particles and HULIS in Beijing. Sci Rep 2016; 6:29618. [PMID: 27470588 PMCID: PMC4965869 DOI: 10.1038/srep29618] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 06/22/2016] [Indexed: 11/22/2022] Open
Abstract
Bioaerosols and humic-like substances (HULIS) are important components of atmospheric aerosols, which can affect regional climate by acting as cloud condensation nuclei and some of which can damage human health. Up to date, release of bioaerosols and HULIS initiated by precipitation is still poorly understood. Here we present different release processes for bioaerosols, non-bioaerosols and HULIS during a precipitation event in Beijing, China. Large fungal-spore-like aerosols were emitted at the onset and later weak stage of precipitation, the number concentration of which increased by more than two folds, while the number concentration of bacteria-like particles doubled when the precipitation strengthened. Besides, a good correlation between protein-like substances that were measured simultaneously by on-line and off-line fluorescence techniques consolidated their applications to measure bioaerosols. Furthermore, our EEM results suggest that the relative contribution of water-soluble HULIS to microbial materials was enhanced gradually by the rain event.
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Affiliation(s)
- Siyao Yue
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.,College of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong Ren
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.,College of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Songyun Fan
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Yele Sun
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.,Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Zifa Wang
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.,Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Pingqing Fu
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.,Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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47
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Wang H, Chen YL, Teng SH, Xu ZP, Xu YC, Hsueh PR. Evaluation of the Bruker Biotyper Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry System for Identification of Clinical and Environmental Isolates of Burkholderia pseudomallei. Front Microbiol 2016; 7:415. [PMID: 27092108 PMCID: PMC4824763 DOI: 10.3389/fmicb.2016.00415] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 03/14/2016] [Indexed: 11/13/2022] Open
Abstract
Burkholderia pseudomallei is not represented in the current version of Bruker Biotyper matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) system. A total of 66 isolates of B. pseudomallei, including 30 clinical isolates collected from National Taiwan University Hospital (NTUH, n = 27) and Peking Union Medical College Hospital (PUMCH, n = 3), and 36 isolates of genetically confirmed strains, including 13 from clinical samples and 23 from environmental samples, collected from southern Taiwan were included in this study. All these isolates were identified by partial 16S rDNA gene sequencing analysis and the Bruker Biotyper MALDI-TOF MS system. Among the 30 isolates initially identified as B. pseudomallei by conventional identification methods, one was identified as B. cepacia complex (NTUH) and three were identified as B. putida (PUMCH) by partial 16S rDNA gene sequencing analysis and Bruker Biotyper MALDI-TOF MS system. The Bruker Biotyper MALDI-TOF MS system misidentified 62 genetically confirmed B. pseudomallei isolates as B. thailandensis or Burkholderia species (score values, 1.803–2.063) when the currently available database (DB 5627) was used. However, using a newly created MALDI-TOF MS database (including B. pseudomallei NTUH-3 strain), all isolates were correctly identified as B. pseudomallei (score values >2.000, 100%). An additional 60 isolates of genetically confirmed B. cepacia complex and B. putida were also evaluated by the Bruker Biotyper MALDI-TOF MS system using the newly created database and none of these isolates were identified as B. pseudomallei. MALDI-TOF MS is a versatile and robust tool for the rapid identification of B. pseudomallei using the enhanced database.
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Affiliation(s)
- He Wang
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences Beijing, China
| | - Ya-Lei Chen
- Department of Biotechnology, National Kaohsiung Normal University Kaohsiung, Taiwan
| | - Shih-Hua Teng
- Department of Graduate Institute of Biomedical Sciences, Chang Gung University Tao-Yuan, Taiwan
| | - Zhi-Peng Xu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences Beijing, China
| | - Ying-Chun Xu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences Beijing, China
| | - Po-Ren Hsueh
- Departments of Laboratory Medicine and Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine Taipei, Taiwan
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48
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Limmathurotsakul D, Golding N, Dance DA, Messina JP, Pigott DM, Moyes CL, Rolim DB, Bertherat E, Day NP, Peacock SJ, Hay SI. Predicted global distribution of Burkholderia pseudomallei and burden of melioidosis. Nat Microbiol 2016; 1:15008. [PMID: 26877885 PMCID: PMC4746747 DOI: 10.1038/nmicrobiol.2015.8] [Citation(s) in RCA: 613] [Impact Index Per Article: 76.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 10/19/2015] [Indexed: 12/20/2022]
Abstract
Burkholderia pseudomallei, a highly pathogenic bacterium that causes melioidosis, is commonly found in soil in Southeast Asia and Northern Australia1,2. Melioidosis can be difficult to diagnose due to its diverse clinical manifestations and the inadequacy of conventional bacterial identification methods3. The bacterium is intrinsically resistant to a wide range of antimicrobials, and treatment with ineffective antimicrobials may result in case fatality rates (CFRs) exceeding 70%4,5. The importation of infected animals has, in the past, spread melioidosis to non-endemic areas6,7. The global distribution of B. pseudomallei and burden of melioidosis, however, remain poorly understood. Here, we map documented human and animal cases, and the presence of environmental B. pseudomallei, and combine this in a formal modelling framework8-10 to estimate the global burden of melioidosis. We estimate there to be 165,000 (95% credible interval 68,000-412,000) human melioidosis cases per year worldwide, of which 89,000 (36,000-227,000) die. Our estimates suggest that melioidosis is severely underreported in the 45 countries in which it is known to be endemic and that melioidosis is likely endemic in a further 34 countries which have never reported the disease. The large numbers of estimated cases and fatalities emphasise that the disease warrants renewed attention from public health officials and policy makers.
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Affiliation(s)
- Direk Limmathurotsakul
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, United Kingdom ; Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand ; Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Nick Golding
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, United Kingdom
| | - David Ab Dance
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Vientiane, Lao PDR ; Centre for Tropical Medicine and Global Health, University of Oxford, Old Road Campus, Oxford, OX3 7FZ, United Kingdom
| | - Jane P Messina
- Department of Zoology, University of Oxford, South Parks Road, Oxford, OX1 3PS, United Kingdom
| | - David M Pigott
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, United Kingdom
| | - Catherine L Moyes
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, United Kingdom
| | | | - Eric Bertherat
- Department of Pandemic and Epidemic Diseases, World Health Organization, Geneva, 27, Switzerland
| | - Nicholas Pj Day
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand ; Centre for Tropical Medicine and Global Health, University of Oxford, Old Road Campus, Oxford, OX3 7FZ, United Kingdom
| | - Sharon J Peacock
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand ; Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, United Kingdom ; London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
| | - Simon I Hay
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, United Kingdom ; Institute of Health Metrics and Evaluation, University of Washington, Seattle, WA 98121, USA ; Fogarty International Center, National Institutes of Health, Bethesda, MD 20892-2220, USA
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