1
|
Selvam K, Najib MA, Khalid MF, Yunus MH, Wahab HA, Harun A, Zainulabid UA, Fadzli Mustaffa KM, Aziah I. Isolation and characterization of ssDNA aptamers against BipD antigen of Burkholderia pseudomallei. Anal Biochem 2024; 695:115655. [PMID: 39214325 DOI: 10.1016/j.ab.2024.115655] [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: 06/27/2024] [Revised: 08/19/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND Melioidosis is difficult to diagnose due to its wide range of clinical symptoms. The culture method is time-consuming and less sensitive, emphasizing the importance of rapid and accurate diagnostic tests for melioidosis. Burkholderia invasion protein D (BipD) of Burkholderia pseudomallei is a potential diagnostic biomarker. This study aimed to isolate and characterize single-stranded DNA aptamers that specifically target BipD. METHODS The recombinant BipD protein was produced, followed by isolation of BipD-specific aptamers using Systematic Evolution of Ligands by EXponential enrichment. The binding affinity and specificity of the selected aptamers were evaluated using Enzyme-Linked Oligonucleotide Assay. RESULTS The fifth SELEX cycle showed a notable enrichment of recombinant BipD protein-specific aptamers. Sequencing analysis identified two clusters with a total of seventeen distinct aptamers. AptBipD1, AptBipD13, and AptBipD50 were chosen based on their frequency. Among them, AptBipD1 exhibited the highest binding affinity with a Kd value of 1.0 μM for the recombinant BipD protein. Furthermore, AptBipD1 showed significant specificity for B. pseudomallei compared to other tested bacteria. CONCLUSION AptBipD1 is a promising candidate for further development of reliable, affordable, and efficient point-of-care diagnostic tests for melioidosis.
Collapse
Affiliation(s)
- Kasturi Selvam
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Mohamad Ahmad Najib
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Muhammad Fazli Khalid
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Muhammad Hafiznur Yunus
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Habibah A Wahab
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800, Pulau, Pinang, Malaysia
| | - Azian Harun
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia; Hospital Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Ummu Afeera Zainulabid
- Department of Internal Medicine, Kulliyyah of Medicine, International Islamic University Malaysia, Kuantan, 25200, Pahang, Malaysia
| | - Khairul Mohd Fadzli Mustaffa
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Ismail Aziah
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia.
| |
Collapse
|
2
|
Nan X, Yao X, Yang L, Cui Y. Lateral flow assay of pathogenic viruses and bacteria in healthcare. Analyst 2023; 148:4573-4590. [PMID: 37655501 DOI: 10.1039/d3an00719g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Healthcare-associated pathogenic viruses and bacteria can have a serious impact on human health and have attracted widespread global attention. The lateral flow assay is a unidirectional detection based on the binding of a target analyte and a bioreceptor on the device via lateral flow. With incredible advantages over traditional chromatographic methods, such as rapid detection, ease of manufacture and cost effectiveness, these test strips are increasingly considered the ideal form for point-of-care applications. This review explores lateral flow assays for pathogenic viruses and bacteria, with a particular focus on methodologies, device components, construction methods, and applications. We anticipate that this review could provide exciting opportunities for developing new lateral flow devices for pathogens and advance related healthcare applications.
Collapse
Affiliation(s)
- Xuanxu Nan
- School of Materials Science and Engineering, Peking University; First Hospital Interdisciplinary Research Center, Peking University, Beijing 100871, P.R. China.
| | - Xuesong Yao
- School of Materials Science and Engineering, Peking University; First Hospital Interdisciplinary Research Center, Peking University, Beijing 100871, P.R. China.
| | - Li Yang
- Peking University First Hospital; Peking University Institute of Nephrology, Beijing 100034, P. R. China.
| | - Yue Cui
- School of Materials Science and Engineering, Peking University; First Hospital Interdisciplinary Research Center, Peking University, Beijing 100871, P.R. China.
| |
Collapse
|
3
|
Raj S, Sistla S, Sadanandan DM, Kadhiravan T, Rameesh BMS, Amalnath D. Clinical Profile and Predictors of Mortality among Patients with Melioidosis. J Glob Infect Dis 2023; 15:72-78. [PMID: 37469465 PMCID: PMC10353644 DOI: 10.4103/jgid.jgid_134_22] [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: 07/01/2022] [Revised: 01/13/2023] [Accepted: 04/28/2023] [Indexed: 07/21/2023] Open
Abstract
Introduction Melioidosis is an under-recognized but important infection with high mortality and morbidity. It is endemic along the coastal regions of the Southern part of India. The present study focuses on the varied clinical manifestations, associated risk factors, and outcomes in patients from the Southeastern part of India. Methods Seventy patients from January 2018 to June 2021 from a Tertiary Care Hospital were included and prospectively followed up from 6 months to 3 years. Cox regression was performed to test for the association of various clinical and demographic factors with overall survival. Results Diabetes and occupational exposure to soil and water (78.6%) followed by alcoholism (61.4%) were the most common risk factors for melioidosis. The most frequent presentation was sepsis (47.1%), followed by skin and soft tissue infection (32.9%) and pneumonia (25.7%). Mortality was 50%. Patients with sepsis had a 3.5-fold higher risk of mortality (adjusted hazard ratio = 3.50; P = 0.01) while other risk factors were not significantly associated with mortality. Conclusion Lifestyle-dependent risk factors (diabetes, occupational exposure, and alcoholism) were most common among patients with melioidosis. Hospitalization among patients with sepsis is associated with high mortality despite the initiation of specific therapy.
Collapse
Affiliation(s)
- Sruthi Raj
- Department of Microbiology, JIPMER, Puducherry, India
| | | | | | | | | | | |
Collapse
|
4
|
Melioidosis and Burkholderia pseudomallei : progress in epidemiology, diagnosis, treatment and vaccination. Curr Opin Infect Dis 2022; 35:517-523. [PMID: 35942848 DOI: 10.1097/qco.0000000000000869] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF REVIEW Melioidosis and its causative bacterium Burkholderia pseudomallei are being found in unexpected locations and bacterial genotyping is providing new insights into global spread and where and how individuals are being infected. This review summarizes recent studies covering the epidemiology, diagnosis, treatment, and prevention of melioidosis. RECENT FINDINGS Whole-genome sequencing of B. pseudomallei from patients and environmental sampling is informing the phylogeography of B. pseudomallei at regional, continental, and global levels, while also defining the epidemiology for individual cases. The situation in Africa remains the most unresolved, while the evolving story of B. pseudomallei in the Americas may establish that B. pseudomallei is endemic in parts of southern USA. Guidelines for diagnosis and treatment of melioidosis are well established, and published mortality has decreased from 50% or higher to 10% or lower in some countries but access to laboratory and therapeutic resources are not available or are extremely limited in many melioidosis-endemic regions. SUMMARY The enormous clinical diversity of melioidosis and the complexities of laboratory diagnosis and of treatment make it a sentinel disease for highlighting the continuing global disparities in access to and provision of healthcare.
Collapse
|
5
|
Mohapatra PR. Increasing Melioidosis Cases in India. JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2022. [DOI: 10.5005/japi-11001-0088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
6
|
Gupta A, Siddiqui F, Purwar S, Joshi R, Mukhopadhyay C. Is it always COVID-19 in acute febrile illness in the tropics during the pandemic? PLoS Negl Trop Dis 2022; 16:e0010891. [PMID: 36322563 PMCID: PMC9629600 DOI: 10.1371/journal.pntd.0010891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- Ayush Gupta
- Department of Microbiology, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India
- * E-mail:
| | - Farha Siddiqui
- Department of Microbiology, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India
| | - Shashank Purwar
- Department of Microbiology, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India
| | - Rajnish Joshi
- Department of General Medicine, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India
| | - Chiranjay Mukhopadhyay
- Department of Microbiology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Karnataka, India
- Center for Emerging and Tropical Diseases, Manipal Academy of Higher Education, Manipal, Karnataka, India
| |
Collapse
|
7
|
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.
Collapse
Affiliation(s)
| | - Baijayantimala Mishra
- Department of Microbiology, All India Institute of Medical Sciences, Bhubaneswar, India-751019
| |
Collapse
|
8
|
Behera B, Radhakrishnan A, Mohapatra S, Mishra B. Melioidosis in Children, Brazil, 1989–2019. Emerg Infect Dis 2022. [DOI: 10.3201/2805.211473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
9
|
Behera B, Radhakrishnan A, Mohapatra S, Mishra B. Melioidosis in Children, Brazil, 1989-2019. Emerg Infect Dis 2022; 28:1081-1082. [PMID: 35450564 PMCID: PMC9045445 DOI: 10.3201/eid2805.211473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
|
10
|
Currie BJ, Woerle C, Mayo M, Meumann EM, Baird RW. What is the role of lateral flow immunoassay for the diagnosis of melioidosis? Open Forum Infect Dis 2022; 9:ofac149. [PMID: 35493111 PMCID: PMC9043003 DOI: 10.1093/ofid/ofac149] [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: 01/08/2022] [Accepted: 03/19/2022] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Culture of Burkholderia pseudomallei remains the gold standard for diagnosis of melioidosis but is not possible in many resource-limited settings where melioidosis is endemic. Direct identification of B. pseudomallei antigen in clinical samples has been developed using a lateral flow immunoassay (LFA) targeting B. pseudomallei capsular polysaccharide.
Methods
We summarised the findings from the 8 studies to date of the Active Melioidosis Detect (AMD) LFA and compared these with our results from 232 patients with culture-confirmed melioidosis. We have also optimised the methodology for testing different clinical samples.
Results
Sensitivity and specificity for different samples was broadly similar in our study to those published from Thailand, India, Laos and Malaysia. 130/232 (56%) of our melioidosis patients were positive on one or more AMD tests: 27% for serum (rising to 39% in those with bacteremic melioidosis and 68% in those with septic shock); 63% for urine (72% in bacteremic melioidosis and 90% in septic shock); 85% in sputum that was culture positive; and 83% in pus that was culture positive. Heating sputum and pus samples increased sensitivity. Faint false positive urine bands seen on earlier AMD versions were not seen when re-tested using the most recent version, AMD-Plus.
Conclusions
While sensitivity of melioidosis LFA is low overall for blood samples, there is potential for use as a rapid diagnostic; testing serum and urine from those with severe sepsis who may have melioidosis and testing sputum and pus samples from clinically relevant scenarios. Prospective studies of patients with sepsis and other clinical presentations resembling melioidosis are required to ascertain if the specificity of AMD-PLUS is adequate to enable diagnosis of melioidosis with a high positive predictive value.
Collapse
Affiliation(s)
- Bart J Currie
- Global and Tropical Health Division, Menzies School of Health Research, Darwin, Northern Territory, Australia
- Department of Infectious Diseases and Pathology and Northern Territory Medical Program, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Celeste Woerle
- Global and Tropical Health Division, Menzies School of Health Research, Darwin, Northern Territory, Australia
| | - Mark Mayo
- Global and Tropical Health Division, Menzies School of Health Research, Darwin, Northern Territory, Australia
| | - Ella M Meumann
- Global and Tropical Health Division, Menzies School of Health Research, Darwin, Northern Territory, Australia
- Department of Infectious Diseases and Pathology and Northern Territory Medical Program, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Robert W Baird
- Department of Infectious Diseases and Pathology and Northern Territory Medical Program, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| |
Collapse
|
11
|
Sripa B, Leonardo L, Hong SJ, Ito A, Brattig NW. Status and perspective of asian neglected tropical diseases. Acta Trop 2022; 225:106212. [PMID: 34687645 DOI: 10.1016/j.actatropica.2021.106212] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/12/2021] [Accepted: 10/13/2021] [Indexed: 01/09/2023]
|