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Ameen E, Nin Zhu S, Morales Guzman C, Taub E, Siles C, Meza Sanchez G, Vilcarromero S, Ramal C, Tangoa N, Marcos LA. Feasibility of Training Community Health Workers to Use Smartphone-Attached Microscopy for Point-of-Care Visualization of Soil-Transmitted Helminths in the Peruvian Amazon. Am J Trop Med Hyg 2023; 108:1175-1182. [PMID: 37068753 PMCID: PMC10540104 DOI: 10.4269/ajtmh.22-0210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 11/21/2022] [Indexed: 04/19/2023] Open
Abstract
The prevalence of soil-transmitted helminths (STH) is high in communities within the Peruvian Amazon despite repeated mass-drug administration, demanding alternative strategies of control. Smartphone-attached microscopy (SAM) permits visualization of STH from a small portable microscope through a smartphone screen, potentially providing an inexpensive and rapid method of STH visualization in communities where diagnostic laboratories with microscopes are inaccessible. In this study, a total of 45 community health workers who work within the health systems of Loreto, Peru, attended a 1-day training session with lectures and practicums on STH and SAM. Participants received a pre- and post-intervention questionnaire. Post-intervention, participants were significantly more confident using SAM and identifying parasite images, symptoms, transmission, and treatment (P ≤ 0.0045). Post-intervention, participants correctly labeled a median of five of seven SAM apparatus components and five of eight steps of Kato-Katz technique, were less likely to choose taking medicine to prevent parasite infection (P = 0.0075), and were more likely to select Kato-Katz technique as a type of diagnostic test (P < 0.0001). Most participants felt ready to use SAM in their communities and stated that it could help rural communities far from health centers or laboratories (24%); provide faster identification, results, diagnosis (19%); permit at-home or on-the-spot visualization (14%); and save money (14%). Results show that community health workers show a high level of willingness and competency to learn about both STH and SAM and may be a yet-unexplored practical method of augmenting STH visualization, bringing healthcare to communities in Loreto with poor access to diagnostic laboratories and clinics.
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Affiliation(s)
- Eve Ameen
- Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
| | - Simon Nin Zhu
- Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
| | | | - Erin Taub
- Global Health Institute, Stony Brook University Hospital, Stony Brook, New York
| | | | | | | | - Cesar Ramal
- Universidad Nacional de la Amazonía Peruana, Iquitos, Peru
| | - Nolberto Tangoa
- Centro de Salud San Juan, Ministerio de Salud Peruana, Iquitos, Peru
| | - Luis A. Marcos
- Global Health Institute, Stony Brook University Hospital, Stony Brook, New York
- Infectious Diseases Division, Department of Medicine, Stony Brook University, Stony Brook, New York
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Human–Device Interaction in the Life Science Laboratory. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2022; 182:83-113. [DOI: 10.1007/10_2021_183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Demeke Teklemariam A, Samaddar M, Alharbi MG, Al-Hindi RR, Bhunia AK. Biosensor and molecular-based methods for the detection of human coronaviruses: A review. Mol Cell Probes 2020; 54:101662. [PMID: 32911064 PMCID: PMC7477626 DOI: 10.1016/j.mcp.2020.101662] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/02/2020] [Accepted: 09/02/2020] [Indexed: 12/28/2022]
Abstract
The ongoing crisis due to the global pandemic caused by a highly contagious coronavirus (Coronavirus disease - 2019; COVID-19) and the lack of either proven effective therapy or a vaccine has made diagnostic a valuable tool in disease tracking and prevention. The complex nature of this newly emerging virus calls for scientists' attention to find the most reliable, highly sensitive, and selective detection techniques for better control or spread of the disease. Reverse transcriptase-polymerase chain reaction (RT-PCR) and serology-based tests are currently being used. However, the speed and accuracy of these tests may not meet the current demand; thus, alternative technology platforms are being developed. Nano biosensor technology platforms have been established as a promising diagnostic tool for rapid and accurate detection of viruses as well as other life-threatening diseases even in resource-limited settings. This review aims to provide a short overview of recent advancements in molecular and biosensor-based diagnosis of viruses, including the human coronaviruses, and highlight the challenges and future perspectives of these detection technologies.
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Affiliation(s)
- Addisu Demeke Teklemariam
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Manalee Samaddar
- Department of Food Science, Purdue University, West Lafayette, 47907, IN, USA; Purdue Institute of Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, 47907, IN, USA
| | - Mona G Alharbi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Rashad R Al-Hindi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Arun K Bhunia
- Department of Food Science, Purdue University, West Lafayette, 47907, IN, USA; Department of Comparative Pathobiology, Purdue University, West Lafayette, 47907, IN, USA; Purdue Institute of Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, 47907, IN, USA.
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Miesler T, Wimschneider C, Brem A, Meinel L. Frugal Innovation for Point-of-Care Diagnostics Controlling Outbreaks and Epidemics. ACS Biomater Sci Eng 2020; 6:2709-2725. [PMID: 33463254 DOI: 10.1021/acsbiomaterials.9b01712] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Today epidemics of infectious diseases occur more often and spread both faster and further due to globalization and changes in our lifestyle. One way to meet these biological threats are so-called "Frugal Innovations", which focus on the development of affordable, rapid, and easy-to-use diagnostics with widespread use. In this context, point-of-care-tests (POCTs), performed at the patient's bedside, reduce extensive waiting times and unnecessary treatments and enable effective containment measures. This Perspective covers advances in POCT diagnostics on the basis of frugal innovation characteristics that will enable a faster, less expensive, and more convenient reaction to upcoming epidemics. Established POCT systems on the health care market, as well as currently evolving technological advancements in that sector are discussed. Progress in POCT technology and insights on how to most effectively use them allows the handling of more patients in a shorter time frame and consequently improves clinical outcomes at lower cost.
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Affiliation(s)
- Tobias Miesler
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg Germany
| | - Christine Wimschneider
- Chair of Technology Management, FAU Erlangen-Nürnberg, Dr.-Mack-Str. 81, 90762 Fürth, Germany
| | - Alexander Brem
- Institute of Entrepreneurship & Innovation, University of Stuttgart, Pfaffenwaldring 19, 70569 Stuttgart, Germany.,Mads Clausen Institute, University of Southern Denmark, Alsion 1, 6400 Sonderborg, Denmark
| | - Lorenz Meinel
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg Germany.,Helmholtz Institute for RNA-based Infection Research (HIRI), Helmholtz Center for Infection Research (HZI), Würzburg, Germany
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Kinimi E, Odongo S, Muyldermans S, Kock R, Misinzo G. Paradigm shift in the diagnosis of peste des petits ruminants: scoping review. Acta Vet Scand 2020; 62:7. [PMID: 31996243 PMCID: PMC6988203 DOI: 10.1186/s13028-020-0505-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 01/18/2020] [Indexed: 11/10/2022] Open
Abstract
Peste des petits ruminants virus causes a highly contagious disease, which poses enormous economic losses in domestic animals and threatens the conservation of wild herbivores. Diagnosis remains a cornerstone to the Peste des petits ruminants Global Control and Eradication Strategy, an initiative of the World Organisation for Animal Health and the Food and Agriculture Organisation. The present review presents the peste des petits ruminants diagnostic landscape, including the practicality of commercially available diagnostic tools, prototype tests and opportunities for new technologies. The most common peste des petits ruminants diagnostic tools include; agar gel immunodiffusion, counter-immunoelectrophoresis, enzyme-linked immunosorbent assays, reverse transcription polymerase chain reaction either gel-based or real-time, reverse transcription loop-mediated isothermal amplification, reverse transcription recombinase polymerase amplification assays, immunochromatographic lateral flow devices, luciferase immunoprecipitation system and pseudotype-based assays. These tests vary in their technical demands, but all require a laboratory with exception of immunochromatographic lateral flow and possibly reverse transcription loop-mediated isothermal amplification and reverse transcription recombinase polymerase amplification assays. Thus, we are proposing an efficient integration of diagnostic tests for rapid and correct identification of peste des petits ruminants in endemic zones and to rapidly confirm outbreaks. Deployment of pen-side tests will improve diagnostic capacity in extremely remote settings and susceptible wildlife ecosystems, where transportation of clinical samples in the optimum cold chain is unreliable.
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Noah NM, Ndangili PM. Current Trends of Nanobiosensors for Point-of-Care Diagnostics. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2019; 2019:2179718. [PMID: 31886019 PMCID: PMC6925704 DOI: 10.1155/2019/2179718] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 09/03/2019] [Accepted: 09/28/2019] [Indexed: 05/24/2023]
Abstract
In order to provide better-quality health care, it is very important that high standards of health care management are achieved by making timely decisions based on rapid diagnostics, smart data analysis, and informatics analysis. Point-of-care testing ensures fast detection of analytes near to the patients facilitating a better disease diagnosis, monitoring, and management. It also enables quick medical decisions since the diseases can be diagnosed at an early stage which leads to improved health outcomes for the patients enabling them to start early treatment. In the recent past, various potential point-of-care devices have been developed and they are paving the way to next-generation point-of-care testing. Biosensors are very critical components of point-of-care devices since they are directly responsible for the bioanalytical performance of an essay. As such, they have been explored for their prospective point-of-care applications necessary for personalized health care management since they usually estimate the levels of biological markers or any chemical reaction by producing signals mainly associated with the concentration of an analyte and hence can detect disease causing markers such as body fluids. Their high selectivity and sensitivity have allowed for early diagnosis and management of targeted diseases; hence, facilitating timely therapy decisions and combination with nanotechnology can improve assessment of the disease onset and its progression and help to plan for treatment of many diseases. In this review, we explore how nanotechnology has been utilized in the development of nanosensors and the current trends of these nanosensors for point-of-care diagnosis of various diseases.
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Affiliation(s)
- Naumih M. Noah
- School of Pharmacy and Health Sciences, United States International University-Africa, P.O. Box 14634-00800, Nairobi, Kenya
| | - Peter M. Ndangili
- Department of Chemical Science and Technology (DCST), Technical University of Kenya, P.O. Box 52428-00200, Nairobi, Kenya
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Yang A, Bakhtari N, Langdon-Embry L, Redwood E, Grandjean Lapierre S, Rakotomanga P, Rafalimanantsoa A, De Dios Santos J, Vigan-Womas I, Knoblauch AM, Marcos LA. Kankanet: An artificial neural network-based object detection smartphone application and mobile microscope as a point-of-care diagnostic aid for soil-transmitted helminthiases. PLoS Negl Trop Dis 2019; 13:e0007577. [PMID: 31381573 PMCID: PMC6695198 DOI: 10.1371/journal.pntd.0007577] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 08/15/2019] [Accepted: 06/25/2019] [Indexed: 12/20/2022] Open
Abstract
Background Endemic areas for soil-transmitted helminthiases often lack the tools and trained personnel necessary for point-of-care diagnosis. This study pilots the use of smartphone microscopy and an artificial neural network-based (ANN) object detection application named Kankanet to address those two needs. Methodology/Principal findings A smartphone was equipped with a USB Video Class (UVC) microscope attachment and Kankanet, which was trained to recognize eggs of Ascaris lumbricoides, Trichuris trichiura, and hookworm using a dataset of 2,078 images. It was evaluated for interpretive accuracy based on 185 new images. Fecal samples were processed using Kato-Katz (KK), spontaneous sedimentation technique in tube (SSTT), and Merthiolate-Iodine-Formaldehyde (MIF) techniques. UVC imaging and ANN interpretation of these slides was compared to parasitologist interpretation of standard microscopy.Relative to a gold standard defined as any positive result from parasitologist reading of KK, SSTT, and MIF preparations through standard microscopy, parasitologists reading UVC imaging of SSTT achieved a comparable sensitivity (82.9%) and specificity (97.1%) in A. lumbricoides to standard KK interpretation (97.0% sensitivity, 96.0% specificity). The UVC could not accurately image T. trichiura or hookworm. Though Kankanet interpretation was not quite as sensitive as parasitologist interpretation, it still achieved high sensitivity for A. lumbricoides and hookworm (69.6% and 71.4%, respectively). Kankanet showed high sensitivity for T. trichiura in microscope images (100.0%), but low in UVC images (50.0%). Conclusions/Significance The UVC achieved comparable sensitivity to standard microscopy with only A. lumbricoides. With further improvement of image resolution and magnification, UVC shows promise as a point-of-care imaging tool. In addition to smartphone microscopy, ANN-based object detection can be developed as a diagnostic aid. Though trained with a limited dataset, Kankanet accurately interprets both standard microscope and low-quality UVC images. Kankanet may achieve sensitivity comparable to parasitologists with continued expansion of the image database and improvement of machine learning technology. For rainforest-enshrouded rural villages of Madagascar, soil-transmitted helminthiases are more the rule than the exception. However, the microscopy equipment and lab technicians needed for diagnosis are a distance of several days’ hike away. We piloted a solution for these communities by leveraging resources the villages already had: a traveling team of local health care workers, and their personal Android smartphones. We demonstrated that an inexpensive, commercially available microscope attachment for smartphones could rival the sensitivity and specificity of a regular microscope using standard field fecal sample processing techniques. We also developed an artificial neural network-based object detection Android application, called Kankanet, based on open-source programming libraries. Kankanet was used to detect eggs of the three most common soil-transmitted helminths: Ascaris lumbricoides, Trichuris trichiura, and hookworm. We found Kankanet to be moderately sensitive and highly specific for both standard microscope images and low-quality smartphone microscope images. This proof-of-concept study demonstrates the diagnostic capabilities of artificial neural network-based object detection systems. Since the programming frameworks used were all open-source and user-friendly even for computer science laymen, artificial neural network-based object detection shows strong potential for development of low-cost, high-impact diagnostic aids essential to health care and field research in resource-limited communities.
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Affiliation(s)
- Ariel Yang
- School of Medicine, Stony Brook University, Stony Brook, New York, United States of America
- Global Health Institute, Stony Brook University, Stony Brook, New York, United States of America
- * E-mail:
| | - Nahid Bakhtari
- School of Medicine, Stony Brook University, Stony Brook, New York, United States of America
- Global Health Institute, Stony Brook University, Stony Brook, New York, United States of America
| | - Liana Langdon-Embry
- School of Medicine, Stony Brook University, Stony Brook, New York, United States of America
- Global Health Institute, Stony Brook University, Stony Brook, New York, United States of America
| | - Emile Redwood
- School of Medicine, Stony Brook University, Stony Brook, New York, United States of America
- Global Health Institute, Stony Brook University, Stony Brook, New York, United States of America
| | - Simon Grandjean Lapierre
- Global Health Institute, Stony Brook University, Stony Brook, New York, United States of America
- Immunopathology axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Québec, Canada
- Mycobacteria Unit, Institut Pasteur de Madagascar, Antananarivo, Madagascar
| | | | | | | | - Inès Vigan-Womas
- Immunology of Infectious Diseases Unit, Institut Pasteur de Madagascar, Antananarivo, Madagascar
| | - Astrid M. Knoblauch
- Global Health Institute, Stony Brook University, Stony Brook, New York, United States of America
- Mycobacteria Unit, Institut Pasteur de Madagascar, Antananarivo, Madagascar
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Luis A. Marcos
- Global Health Institute, Stony Brook University, Stony Brook, New York, United States of America
- Department of Medicine, Stony Brook University, New York, United States of America
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Mauk MG. Calling in the test: Smartphone-based urinary sepsis diagnostics. EBioMedicine 2018; 37:11-12. [PMID: 30482724 PMCID: PMC6286647 DOI: 10.1016/j.ebiom.2018.10.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 10/18/2018] [Indexed: 12/29/2022] Open
Affiliation(s)
- Michael G Mauk
- Department of Mechanical Engineering and Applied Mechanics, School of Engineering and Applied Science, University of Pennsylvania, 216 Towne Building, 220 S 33rd St., Philadelphia, PA 19104, USA.
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Mauk MG, Song J, Liu C, Bau HH. Simple Approaches to Minimally-Instrumented, Microfluidic-Based Point-of-Care Nucleic Acid Amplification Tests. BIOSENSORS 2018; 8:E17. [PMID: 29495424 PMCID: PMC5872065 DOI: 10.3390/bios8010017] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 01/29/2018] [Accepted: 02/09/2018] [Indexed: 01/10/2023]
Abstract
Designs and applications of microfluidics-based devices for molecular diagnostics (Nucleic Acid Amplification Tests, NAATs) in infectious disease testing are reviewed, with emphasis on minimally instrumented, point-of-care (POC) tests for resource-limited settings. Microfluidic cartridges ('chips') that combine solid-phase nucleic acid extraction; isothermal enzymatic nucleic acid amplification; pre-stored, paraffin-encapsulated lyophilized reagents; and real-time or endpoint optical detection are described. These chips can be used with a companion module for separating plasma from blood through a combined sedimentation-filtration effect. Three reporter types: Fluorescence, colorimetric dyes, and bioluminescence; and a new paradigm for end-point detection based on a diffusion-reaction column are compared. Multiplexing (parallel amplification and detection of multiple targets) is demonstrated. Low-cost detection and added functionality (data analysis, control, communication) can be realized using a cellphone platform with the chip. Some related and similar-purposed approaches by others are surveyed.
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Affiliation(s)
- Michael G Mauk
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Jinzhao Song
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Changchun Liu
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Haim H Bau
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
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Laboratory Evaluation of a Smartphone-Based Electronic Reader of Rapid Dual Point-of-Care Tests for Antibodies to Human Immunodeficiency Virus and Treponema pallidum Infections. Sex Transm Dis 2018; 44:412-416. [PMID: 28604483 DOI: 10.1097/olq.0000000000000628] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND Dual point-of-care tests for antibodies to human immunodeficiency virus (HIV) and Treponema pallidum allow for same-day testing and treatment and have been demonstrated to be cost-effective in preventing the adverse outcomes of HIV infection and syphilis. By recording and transmitting data as they are collected, electronic readers address challenges related to the decentralization of point-of-care testing. METHODS We evaluated a smartphone-based electronic reader using 201 sera tested with 2 dual rapid tests for detection of antibodies to HIV and T. pallidum in Los Angeles, USA, and Lima, Peru. Tests were read both visually and with the electronic reader. Enzyme immunoassay followed by Western blot and T. pallidum particle agglutination were the reference tests for HIV and T. pallidum, respectively. RESULTS The sensitivities of the 2 rapid tests for detection of HIV were 94.1% and 97.0% for electronic readings. Both tests had a specificity of 100% for detection of HIV by electronic reading. The sensitivities of the 2 rapid tests for detection of T. pallidum were 86.5% and 92.4% for electronic readings. The specificities for detection of T. pallidum were 99.1% and 99.0% by electronic reading. There were no significant differences between the accuracies of visual and electronic readings, and the performance did not differ between the 2 study sites. CONCLUSIONS Our results show the electronic reader to be a promising option for increasing the use of point-of-care testing programs.
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Austerjost J, Marquard D, Raddatz L, Geier D, Becker T, Scheper T, Lindner P, Beutel S. A smart device application for the automated determination of E. coli colonies on agar plates. Eng Life Sci 2017; 17:959-966. [PMID: 32624845 DOI: 10.1002/elsc.201700056] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/04/2017] [Accepted: 07/14/2017] [Indexed: 12/15/2022] Open
Abstract
The manual counting of colonies on agar plates to estimate the number of viable organisms (so-called colony-forming units-CFUs) in a defined sample is a commonly used method in microbiological laboratories. The automation of this arduous and time-consuming process through benchtop devices with integrated image processing capability addresses the need for faster and higher sample throughput and more accuracy. While benchtop colony counter solutions are often bulky and expensive, we investigated a cost-effective way to automate the colony counting process with smart devices using their inbuilt camera features and a server-based image processing algorithm. The performance of the developed solution is compared to a commercially available smartphone colony counter app and the manual counts of two scientists trained in biological experiments. The comparisons show a high accuracy of the presented system and demonstrate the potential of smart devices to displace well-established laboratory equipment.
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Affiliation(s)
- Jonas Austerjost
- Institute of Technical Chemistry Leibniz University Hannover Hannover Germany.,Institute of Brewing and Beverage Technology, Forschungszentrum Weihenstephan Technische Universität München Munich Germany
| | - Daniel Marquard
- Institute of Technical Chemistry Leibniz University Hannover Hannover Germany
| | - Lukas Raddatz
- Institute of Technical Chemistry Leibniz University Hannover Hannover Germany.,Institute of Brewing and Beverage Technology, Forschungszentrum Weihenstephan Technische Universität München Munich Germany
| | - Dominik Geier
- Institute of Brewing and Beverage Technology, Forschungszentrum Weihenstephan Technische Universität München Munich Germany
| | - Thomas Becker
- Institute of Brewing and Beverage Technology, Forschungszentrum Weihenstephan Technische Universität München Munich Germany
| | - Thomas Scheper
- Institute of Technical Chemistry Leibniz University Hannover Hannover Germany
| | - Patrick Lindner
- Institute of Technical Chemistry Leibniz University Hannover Hannover Germany
| | - Sascha Beutel
- Institute of Technical Chemistry Leibniz University Hannover Hannover Germany
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Wang Y, Yu L, Kong X, Sun L. Application of nanodiagnostics in point-of-care tests for infectious diseases. Int J Nanomedicine 2017; 12:4789-4803. [PMID: 28740385 PMCID: PMC5503494 DOI: 10.2147/ijn.s137338] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Although tremendous efforts have been put into the treatment of infectious diseases to prevent epidemics and mortality, it is still one of the major health care issues that have a profound impact on humankind. Therefore, the development of specific, sensitive, accurate, rapid, low-cost, and easy-to-use diagnostic tools is still in urgent demand. Nanodiagnostics, defined as the application of nanotechnology to medical diagnostics, can offer many unique opportunities for more successful and efficient diagnosis and treatment for infectious diseases. In this review, we provide an overview of the nanodiagnostics for infectious diseases from nanoparticle-based, nanodevice-based, and point-of-care test (POCT) platforms. Most importantly, emphasis focused on the recent trends in the nanotechnology-based POCT system. The current state-of-the-art and most promising point-of-care nanodiagnostic technologies, including miniaturized diagnostic magnetic resonance platform, magnetic barcode assay system, cell phone-based polarized light microscopy platform, cell phone-based dongle platform, and paper-based POCT platform, for infectious diseases were fully examined. The limitations, challenges, and future trends of the nanodiagnostics in POCTs for infectious diseases are also discussed.
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Affiliation(s)
- Yongzhong Wang
- Anhui Key Laboratory of Modern Biomanufacturing, School of Life Sciences, Anhui University, Hefei, Anhui, People's Republic of China
| | - Li Yu
- Department of Microbiology and Parasitology, Anhui Provincial Laboratory of Microbiology and Parasitology, Anhui Key Laboratory of Zoonoses, Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Xiaowei Kong
- Anhui Key Laboratory of Modern Biomanufacturing, School of Life Sciences, Anhui University, Hefei, Anhui, People's Republic of China
| | - Leming Sun
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
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13
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Optical visualization and quantification of enzyme activity using dynamic droplet lenses. Proc Natl Acad Sci U S A 2017; 114:3821-3825. [PMID: 28348236 DOI: 10.1073/pnas.1618807114] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
In this paper, we describe an approach to measuring enzyme activity based on the reconfiguration of complex emulsions. Changes in the morphology of these complex emulsions, driven by enzyme-responsive surfactants, modulate the transmission of light through a sample. Through this method we demonstrate how simple photodetector measurements may be used to monitor enzyme kinetics. This approach is validated by quantitative measurements of enzyme activity for three different classes of enzymes (amylase, lipase, and sulfatase), relying on two distinct mechanisms for coupling droplet morphology to enzyme activity (host-guest interactions with uncaging and molecular cleavage).
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14
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Programming Tools for Messenger-Based Chatbot System Organization: Implication for Outpatient and Translational Medicines. BIONANOSCIENCE 2016. [DOI: 10.1007/s12668-016-0376-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Linder E, Varjo S, Thors C. Mobile Diagnostics Based on Motion? A Close Look at Motility Patterns in the Schistosome Life Cycle. Diagnostics (Basel) 2016; 6:E24. [PMID: 27322330 PMCID: PMC4931419 DOI: 10.3390/diagnostics6020024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 04/08/2016] [Accepted: 05/23/2016] [Indexed: 12/28/2022] Open
Abstract
Imaging at high resolution and subsequent image analysis with modified mobile phones have the potential to solve problems related to microscopy-based diagnostics of parasitic infections in many endemic regions. Diagnostics using the computing power of "smartphones" is not restricted by limited expertise or limitations set by visual perception of a microscopist. Thus diagnostics currently almost exclusively dependent on recognition of morphological features of pathogenic organisms could be based on additional properties, such as motility characteristics recognizable by computer vision. Of special interest are infectious larval stages and "micro swimmers" of e.g., the schistosome life cycle, which infect the intermediate and definitive hosts, respectively. The ciliated miracidium, emerges from the excreted egg upon its contact with water. This means that for diagnostics, recognition of a swimming miracidium is equivalent to recognition of an egg. The motility pattern of miracidia could be defined by computer vision and used as a diagnostic criterion. To develop motility pattern-based diagnostics of schistosomiasis using simple imaging devices, we analyzed Paramecium as a model for the schistosome miracidium. As a model for invasive nematodes, such as strongyloids and filaria, we examined a different type of motility in the apathogenic nematode Turbatrix, the "vinegar eel." The results of motion time and frequency analysis suggest that target motility may be expressed as specific spectrograms serving as "diagnostic fingerprints."
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Affiliation(s)
- Ewert Linder
- Department of Microbiology, Tumor and Cell Biuology, Karolinska Institutet, SE-17177 Stockholm, Sweden.
| | - Sami Varjo
- Center for Machine Vision and Signal Analysis, University of Oulu, FI-90014 Oulu, Finland.
| | - Cecilia Thors
- Public Health Agency of Sweden, SE-17182 Solna, Sweden.
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Lippi G, Plebani M. Improving accuracy of diagnostic studies in a world with limited resources: a road ahead. ANNALS OF TRANSLATIONAL MEDICINE 2016; 4:43. [PMID: 26904565 DOI: 10.3978/j.issn.2305-5839.2015.11.12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Giuseppe Lippi
- 1 Section of Clinical Biochemistry, University of Verona, Verona, Italy ; 2 Department of Laboratory Medicine, University Hospital of Padova, Padova, Italy
| | - Mario Plebani
- 1 Section of Clinical Biochemistry, University of Verona, Verona, Italy ; 2 Department of Laboratory Medicine, University Hospital of Padova, Padova, Italy
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