Article
Public, Environmental & Occupational Health
Rufin K. Assare, Mathieu Tra-Bi, Jean T. Coulibaly, Paul L. A. M. Corstjens, Mamadou Ouattara, Eveline Huerlimann, Govert J. van Dam, Juerg Utzinger, Eliezer K. N'Goran
Summary: This study assessed the accuracy of UCP-LF CAA and POC-CCA tests for diagnosing Schistosoma mansoni and found that UCP-LF CAA had higher sensitivity compared to POC-CCA and Kato-Katz thick smears. UCP-LF CAA was more accurate in detecting S. mansoni in low-endemicity settings.
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
(2021)
Article
Multidisciplinary Sciences
Oyetunde Timothy Oyeyemi, Camila Amormino Corsini, Gustavo Goncalves, William de Castro Borges, Rafaella Fortini Queiroz Grenfell
Summary: The study demonstrates the potential of using SCA as a diagnostic target for detecting anti-S. mansoni antibodies, with high sensitivity and specificity. The human IgG-specific response against SCA was significantly higher in S. mansoni infected individuals compared to non-infected population. The 10-12 kDa component of SCA could serve as a useful diagnostic tool for chronic schistosomiasis.
SCIENTIFIC REPORTS
(2021)
Article
Immunology
Abdallah Zacharia, Twilumba Makene, Clemence Kinabo, George Ogweno, Faraja Lyamuya, Billy Ngasala
Summary: This study developed a simple and efficient method for the collection and detection of Schistosoma CCA using urine spotted onto filter paper. The optimal results were obtained when the procedure involved dissolving the filter paper containing urine spots in distilled water and incubating at room temperature for 24 hours.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Parasitology
Carlos Graeff-Teixeira, Vivian Favero, Vanessa Fey Pascoal, Renata Perotto de Souza, Francine de Vargas Rigo, Luize Hoffmann Dall Agnese, Fernando Schemelzer Moraes Bezerra, Paulo Marcos Zech Coelho, Martin Johannes Enk, Tereza Cristina Favre, Naftale Katz, Ricardo Riccio Oliveira, Mitermayer Galvao dos Reis, Otavio Sarmento Pieri
Summary: A study evaluated the performance of POC-CCA in an infection-free area and found that it is not recommended as a cut-off point for mass drug administration or a reliable diagnostic tool for infection carriers in low endemic areas. Manufacturers should optimize production standardization and ensure quality and reproducibility of the test before widespread recommendation.
Article
Infectious Diseases
Pytsje T. Hoekstra, Miriam Casacuberta-Parta, Lisette van Lieshout, Paul L. A. M. Corstjens, Roula Tsonaka, Rufin K. Assare, Kigbafori D. Silue, Eliezer K. N'Goran, Yves K. N'Gbesso, Eric A. T. Brienen, Meta Roestenberg, Stefanie Knopp, Jurg Utzinger, Jean T. Coulibaly, Govert J. van Dam
Summary: This study found that the efficacy of praziquantel (PZQ) treatment for schistosomiasis was overestimated when using less sensitive diagnostic methods. The results highlight the importance of using accurate diagnostic tools to monitor different treatment strategies.
PLOS NEGLECTED TROPICAL DISEASES
(2022)
Article
Public, Environmental & Occupational Health
Pytsje T. Hoekstra, Afona Chernet, Claudia J. de Dood, Eric A. T. Brienen, Paul L. A. M. Corstjens, Niklaus D. Labhardt, Beatrice Nickel, Linda Wammes, Govert J. van Dam, Andreas Neumayr, Lisette van Lieshout
Summary: The study on asymptomatic refugees from Eritrea showed that the circulating anodic antigen (CAA) test is the most accurate method for screening and monitoring schistosomiasis infections, while traditional methods such as stool microscopy, serology, and urine point-of-care circulating cathodic antigen (POC-CCA) lack sensitivity.
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
(2022)
Article
Microbiology
Abraham Degarege, Abebe Animut, Yohannes Negash, Berhanu Erko
Summary: The performance of urine reagent strips (URS) in detecting Schistosoma haematobium infection was evaluated using urine filtration microscopy as a reference standard. The study found that URS is good for rapid screening but may have lower sensitivity, particularly for light infections. The sensitivity increased with higher urine egg count and there was a significant association between urine egg count and the level of hematuria.
Article
Chemistry, Analytical
Wichit Taron, Kittirat Phooplub, Sasina Sanchimplee, Kanitpong Piyanamvanich, Wassana Jamnongkan, Anchalee Techasen, Jutarop Phetcharaburanin, Poramate Klanrit, Nisana Namwat, Narong Khuntikeo, Thidarut Boonmars, Paiboon Sithithaworn, Sirirat Ouiganon, Proespichaya Kanatharana, Panote Thavarungkul, Chittanon Buranachai, Watcharin Loilome, Wittaya Ngeontae
Summary: The use of a smartphone-based fluorometer can improve the diagnostic sensitivity of OvAg, providing an excellent diagnostic tool in combination with fluorescent enhancement technology, and showing a good linear relationship with OvAg concentration.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Parasitology
Miriam Casacuberta-Partal, Lisette van Lieshout, Angela van Diepen, Jeroen C. Sijtsma, Arifa Ozir-Fazalalikhan, Jan Pieter R. Koopman, Claudia J. de Dood, Paul L. A. M. Corstjens, Govert J. van Dam, Cornelis H. Hokke, Meta Roestenberg
Summary: The study found that male parasites excrete more circulating antigens than females in both the mouse model and ex vivo, and in mixed infections, serum CAA levels correlate with the number of recovered worms. In mice infected with female worms only, no viable eggs and no inflammation were seen in the livers. Additionally, CAA levels were higher than CCA levels ex vivo.
Article
Parasitology
Otavio Sarmento Pieri, Fernando Schemelzer Moraes Bezerra, Paulo Marcos Zech Coelho, Martin Johannes Enk, Tereza Cristina Favre, Carlos Graeff-Teixeira, Ricardo Riccio Oliveira, Mitermayer Galvao dos Reis, Lee Senhorinha de Almeida Andrade, Lilian Christina Nobrega Holsbach Beck, Vivian Favero, Thaina Rodrigues de Souza Fialho, Ricardo Jose de Paula Souza e Guimaraes, Bruna Souza Santos Oliveira, Vanessa Fey Pascoal, Marta Cristhiany Cunha Pinheiro, Ronald Alves dos Santos, Luciano Kalabric Silva, Isadora Cristina de Siqueira, Renata Perotto de Souza, Naftale Katz
Summary: This study evaluated the performance of the URINE CCA (SCHISTO) ECO TESTE (R) (POC-ECO), a urine-based diagnostic test for S. mansoni currently available in Brazil. The results showed that POC-ECO did not have significantly higher accuracy than the KK method. Therefore, POC-ECO is not currently recommended in Brazilian schistosomiasis elimination programs.
REVISTA DA SOCIEDADE BRASILEIRA DE MEDICINA TROPICAL
(2023)
Article
Parasitology
Tereza Cristina Favre, Lilian Christina Nobrega Holsback Beck, Fernando Schemelzer Moraes Bezerra, Carlos Graeff-Teixeira, Paulo Marcos Zech Coelho, Martin Johannes Enk, Naftale Katz, Ricardo Riccio Oliveira, Mitermayer Galvao dos Reis, Otavio Sarmento Pieri
Summary: This study evaluated the reliability of diagnosing Schistosoma mansoni infection in urine samples stored at -20 degrees C for one year. The results showed that the agreement between freshly collected and stored urine using POC-ECO was inadequate and the accuracy was not significantly higher than routine KK testing. Therefore, the precision and accuracy of POC-ECO need to be optimized before recommending its use in control programs in Brazil.
REVISTA DA SOCIEDADE BRASILEIRA DE MEDICINA TROPICAL
(2022)
Article
Public, Environmental & Occupational Health
Miriam Casacuberta-Partal, Margreet Beenakker, Claudia de Dood, Pytsje Hoekstra, Lisa Kroon, Dieuwke Kornelis, Paul Corstjens, Cornelis H. Hokke, Govert van Dam, Meta Roestenberg, Lisette van Lieshout
Summary: This study examined the specificity of the POC-CCA urine strip test in a non-exposed population, revealing reduced specificity in pregnant women and infants under 9 months. Modifications to the buffers used in the test may eliminate false positivity.
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
(2021)
Article
Biology
Elias Kabbas-Pinango, Moses Arinaitwe, Govert J. J. van Dam, Adriko Moses, Annet Namukuta, Andrina Barungi Nankasi, Nicholas Khayinja Mwima, Fred Besigye, Joaquin M. Prada, Poppy H. L. Lamberton
Summary: Schistosomiasis affects over 240 million people worldwide. Detecting the parasite eggs using Kato-Katz method is specific but not sensitive, while the urine-based POC-CCA test is more sensitive but has specificity issues and interpretation challenges. This study explores the variation in test results and suggests different thresholds for accurate diagnosis and prevalence monitoring.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Spectroscopy
Wichit Taron, Wassana Jamnongkan, Jutarop Phetcharaburanin, Poramate Klanrit, Nisana Namwat, Anchalee Techasen, Paiboon Sithithaworn, Narong Khuntikeo, Thidarut Boonmars, Watcharin Loilome, Wittaya Ngeontae
Summary: The development of a new fluorescence AuNPs-LISA technique utilizing OPD as a chromogenic substrate and incorporating the non-ionic surfactant Triton X-100 has significantly enhanced the detection sensitivity for OvAg concentration, leading to a 1200-fold improvement compared to the colorimetric AuNPs-LISA. The proposed assay demonstrates high diagnosis sensitivity, specificity, and accuracy, providing a promising tool for the detection, control, and elimination of human opisthorchiasis in endemic areas.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Infectious Diseases
Johnny Vlaminck, Ole Lagatie, Daniel Dana, Zeleke Mekonnen, Peter Geldhof, Bruno Levecke, Lieven J. Stuyver
Summary: The study found that for soil-transmitted helminths, testing linear epitopes for antibody response was not sensitive or species-specific enough, while for schistosomes, some promising peptides were identified for future research.
PLOS NEGLECTED TROPICAL DISEASES
(2021)
Article
Allergy
Gyaviira Nkurunungi, Harriet Mpairwe, Serge A. Versteeg, Angela van Diepen, Jacent Nassuuna, Joyce Kabagenyi, Irene Nambuya, Richard E. Sanya, Margaret Nampijja, Sonia Serna, Niels-Christian Reichardt, Cornelis H. Hokke, Emily L. Webb, Ronald van Ree, Maria Yazdanbakhsh, Alison M. Elliott
Summary: In Uganda, IgE sensitization to allergen extracts is common but not due to major allergenic components; over 40% recognized CCD-bearing components; reactivity to specific glycans was inversely associated with asthma.
Article
Immunology
Marie-Astrid Hoogerwerf, Jan Pieter R. Koopman, Jacqueline J. Janse, Marijke C. C. Langenberg, Roos van Schuijlenburg, Yvonne C. M. Kruize, Eric A. T. Brienen, Mikhael D. Manurung, Petra Verbeek-Menken, Martha T. van der Beek, Inge M. Westra, Pauline Meij, Leo G. Visser, Lisette van Lieshout, Sake J. de Vlas, Maria Yazdanbakhsh, Luc E. Coffeng, Meta Roestenberg
Summary: The study found that repeated infection with hookworm larvae increased egg counts, reduced relative variability in egg output, and did not aggravate adverse events.
JOURNAL OF INFECTIOUS DISEASES
(2021)
Article
Infectious Diseases
Ayola A. Adegnika, Sophia G. de Vries, Frejus J. Zinsou, Yabo J. Honkepehedji, Jean-Claude Dejon Agobe, Kafui G. Vodonou, Rodrigue Bikangui, Aurore Bouyoukou Hounkpatin, Emmanuel B. Bache, Marguerite Massinga Loembe, Remko van Leeuwen, Marjan Molemans, Peter G. Kremsner, Maria Yazdanbakhsh, Peter J. Hotez, Maria Elena Bottazzi, Guangzhao Li, Jeffrey M. Bethony, David J. Diemert, Martin P. Grobusch
Summary: This study assessed the safety and immunogenicity of co-administered Na-GST-1 and Na-APR-1 (M74) vaccines in healthy adults in Gabon. Both vaccines were well tolerated in both dose groups and successfully induced IgG antibody production in participants.
LANCET INFECTIOUS DISEASES
(2021)
Article
Critical Care Medicine
John Whitaker, Lindani Chirwa, Boston Munthali, Albert Dube, Abena S. Amoah, Andrew J. M. Leather, Justine Davies
Summary: Clinical vignettes were used to evaluate injury care quality in an LMIC setting, revealing significant variations in scores between Doctors and Clinical Officers, as well as deficiencies in important care aspects following injury scenarios.
INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED
(2021)
Article
Public, Environmental & Occupational Health
Sitti Wahyuni, Marloes M. A. R. van Dorst, Aldian Amaruddin, Munawir Muhammad, Maria Yazdanbakhsh, Firdaus Hamid, Jan Pieter R. Koopman, Erliyani Sartono
Summary: The burden of underweight remains a major problem in Indonesia, while the prevalence of overweight is increasing. Malnutrition is a major determinant of health and has been linked to allergic disorders in children. The relationship between malnutrition and T(H)2 immune markers in school-aged children in Makassar, Indonesia was examined, with underweight associated with lower eosinophil count and overweight associated with increased SPT reactivity.
TROPICAL MEDICINE & INTERNATIONAL HEALTH
(2021)
Article
Infectious Diseases
Piet Cools, Johnny Vlaminck, Jaco J. Verweij, Bruno Levecke
PLOS NEGLECTED TROPICAL DISEASES
(2021)
Article
Microbiology
Tanja Hoffmann, Andreas Hahn, Jaco J. Verweij, Gerard Leboulle, Olfert Landt, Christina Strube, Simone Kann, Denise Dekker, Jurgen May, Hagen Frickmann, Ulrike Loderstadt
Summary: This study compared standard and harsh nucleic acid extraction methods for helminth real-time PCR, finding that in some cases, harsh extraction methods may increase the positivity rate of test results, but the effects vary depending on the specific real-time PCR assay used.
Article
Pathology
Jaco J. Verweij
Summary: This paper discusses setting tailor-made performance characteristics for the validation of laboratory developed tests (LDTs) for the molecular diagnosis of intestinal parasitic infections in compliance with ISO 15189 guidelines, emphasizing the importance of maintaining these tests through daily monitoring and reassessment of the test set-up. It highlights the necessity of modifying or adding additional characteristics based on personal insights to achieve continuous quality improvement in diagnostic laboratory practice.
EXPERT REVIEW OF MOLECULAR DIAGNOSTICS
(2022)
Article
Virology
N. Van der Moeren, V. F. Zwart, G. Goderski, G. T. Rijkers, W. van den Bijllaardt, J. Veenemans, J. A. J. W. Kluytmans, S. D. Pas, A. Meijer, J. J. Verweij, J. L. A. N. Murk, J. J. J. M. Stohr
Summary: The study evaluated the performance of the Diasorin SARS-CoV-2 antigen detection assay (DAA) in clinical and experimental samples, demonstrating high sensitivity and specificity in clinical samples with a Ct value below 30. The test has potential for use as a diagnostic assay for symptomatic community-dwelling individuals early after disease onset in the context of disease control.
JOURNAL OF CLINICAL VIROLOGY
(2021)
Article
Virology
R. Jajou, A. J. G. Mutsaers-van Oudheusden, J. J. Verweij, A. Rietveld, J. L. Murk
Summary: This study found that individuals who transmitted SARS-CoV-2 had viral loads more than three times higher than non-transmitters. The information of viral load can be used to prioritize individuals with the highest risk of transmission during source and contact tracing.
JOURNAL OF CLINICAL VIROLOGY
(2022)
Article
Infectious Diseases
Elias K. Asuming-Brempong, Irene Ayi, William van der Puije, Ben A. Gyan, Irene A. Larbi, Yvonne Ashong, Naa Adjeley Frempong, Joseph K. Quartey, Joseph Otchere, Frances M. Jones, Shona Wilson, David W. Dunne, Daniel A. Boakye
Summary: The study demonstrates that increased IgE levels to ShTAL1 7 weeks after PZQ treatment may be associated with a reduced risk of re-infection. Elevated ShTAL1-IgG4 levels post-treatment could indicate susceptibility to re-infection, providing important implications for vaccine development and shifting mass chemotherapy strategies in endemic areas.
PLOS NEGLECTED TROPICAL DISEASES
(2022)
Letter
Allergy
Abena S. Amoah, Maria Prins, Elisabeth H. D. Bel, Wytske J. Fokkens, Aeilko H. Zwinderman, Maria Yazdanbakhsh, Anke H. Maitland-van der Zee, Ronald van Ree
Article
Microbiology
Nathalie Van der Moeren, Veronica A. T. C. Weterings, Suzan D. Pas, Jaco J. Verweij, Wouter van den Bijllaardt, Joyce Geurts, Vivian F. Zwart, Esther B. Lodder, Jan A. J. W. Kluytmans, Jean-Luc Murk, Joep J. J. M. Stohr
Summary: This study retrospectively describes a SARS-CoV-2 outbreak among a partially vaccinated population in a long-term care facility in the Netherlands. The results suggest that phylogenetic analysis, with a maximum number of included samples, can help control such outbreaks. The study also suggests that long-term care facilities may behave as a single epidemiological unit.
Article
Medicine, General & Internal
John Whitaker, Abena S. Amoah, Albert Dube, Lindani Chirwa, Boston Munthali, Rory F. Rickard, Andrew J. M. Leather, Justine Davies
Summary: This study used process mapping method and the Three Delays framework to visually represent the relationship between critical actions, decisions and barriers to access to care following injury in the Karonga health system in Northern Malawi. Facilitated group process mapping workshops were conducted in 11 health system facilities, and a summary map was created to provide a visual summary of the process following injury within the health system. The most commonly reported barriers were cultural norms, healthcare literacy, traditional healers, lack of transport, and insufficient physical resources.