Información del autor
Autor Evans, Carlton A. |
Documentos disponibles escritos por este autor (36)
texto impreso
Saunders, Matthew J. ; Tovar, Marco A. ; Collier, Dami ; Baldwin, Matthew R. ; Montoya, Rosario ; Valencia, Teresa R. ; Gilman, Robert H. ; Evans, Carlton A. | Elsevier | 2019-07-04T16:59:18ZBACKGROUND: Active case-finding among contacts of patients with tuberculosis is a global health priority, but the effects of active versus passive case-finding are poorly characterised. We assessed the contribution of active versus passive case-[...]texto impreso
Wingfield, Tom ; Tovar, Marco A. ; Datta, Sumona ; Saunders, Matthew J. ; Evans, Carlton A. | Elsevier | 2018-12-03T17:04:42Ztexto impreso
Heitzinger, Kristen ; Hawes, Stephen E. ; Rocha, Claudio A. ; Álvarez, Carlos ; Evans, Carlton A. | American Society of Tropical Medicine and Hygiene | 2020-07-14T00:01:15ZApproximately two billion people lack access to microbiologically safe drinking water globally. Boiling is the most popular household water treatment method and significantly reduces diarrheal disease, but is often practiced inconsistently or in[...]texto impreso
Datta, Sumona ; Sherman, Jonathan M. ; Bravard, Marjory A. ; Valencia, Teresa ; Gilman, Robert H. ; Evans, Carlton A. | Oxford University Press | 2019-02-06T14:52:17ZBACKGROUND: It is difficult to determine whether early tuberculosis treatment is effective in reducing the infectiousness of patients' sputum, because culture takes weeks and conventional acid-fast sputum microscopy and molecular tests cannot d[...]texto impreso
Datta, Sumona ; Shah, Lena ; Gilman, Robert H. ; Evans, Carlton A. | Elsevier | 2019-01-25T15:02:20ZBACKGROUND: The performance of laboratory tests to diagnose pulmonary tuberculosis is dependent on the quality of the sputum sample tested. The relative merits of sputum collection methods to improve tuberculosis diagnosis are poorly characteris[...]texto impreso
Rudgard, William E. ; Evans, Carlton A. ; Sweeney, Sedona ; Wingfield, Tom ; Lonnroth, Knut ; Barreira, Draurio ; Boccia, Delia | Public Library of Science | 2019-01-25T15:02:21ZBACKGROUND: Illness-related costs for patients with tuberculosis (TB) ?20% of pre-illness annual household income predict adverse treatment outcomes and have been termed "catastrophic." Social protection initiatives, including cash transfers, ar[...]texto impreso
Oberhelman, Richard A. ; Soto-Castellares, Giselle ; Gilman, Robert H. ; Castillo, Maria E. ; Kolevic, Lenka ; Delpino, Trinidad ; Saito, Mayuko ; Salazar-Lindo, Eduardo ; Negron, Eduardo ; Montenegro, Sonia ; Laguna-Torres, V. Alberto ; Maurtua-Neumann, Paola ; Datta, Sumona ; Evans, Carlton A. | Public Library of Science | 2019-02-06T14:53:11ZBACKGROUND: Diagnosing tuberculosis in children is challenging because specimens are difficult to obtain and contain low tuberculosis concentrations, especially with HIV-coinfection. Few studies included well-controls so test specificities are [...]texto impreso
Lee, Gwenyth O. ; Comina, Germán ; Hernández-Córdova, Gustavo ; Naik, Nehal ; Gayoso, Oscar ; Ticona, Eduardo ; Coronel, Jorge ; Evans, Carlton A. ; Zimic, Mirko ; Paz-Soldan, Valerie A. ; Gilman, Robert H. ; Oberhelman, Richard | Public Library of Science | 2020-07-14T00:02:31ZCough is a characteristic symptom of tuberculosis, is the main cause of transmission, and is used to assess treatment response. We aimed to identify the best measure of cough severity and characterize changes during initial tuberculosis therapy.[...]texto impreso
Proaño, Alvaro ; Bui, David P. ; López, José W. ; Vu, Nancy M. ; Bravard, Marjory A. ; Lee, Gwenyth O. ; Tracey, Brian H. ; Xu, Ziyue ; Comina, Germán ; Ticona, Eduardo ; Mollura, Daniel J. ; Friedland, Jon S. ; Moore, David A. J. ; Evans, Carlton A. ; Caligiuri, Philip ; Gilman, Robert H. | Elsevier | 2018-11-30T03:10:43ZBACKGROUND: Cough frequency, and its duration, is a biomarker that can be used in low-resource settings without the need of laboratory culture and has been associated with transmission and treatment response. Radiologic characteristics associate[...]texto impreso
Wingfield, Tom ; Boccia, Delia ; Tovar, Marco ; Gavino, Arquimedes ; Zevallos, Karine ; Montoya, Rosario ; Lonnroth, Knut ; Evans, Carlton A. | Public Library of Science | 2020-06-10T18:12:16ZBACKGROUND: Even when tuberculosis (TB) treatment is free, hidden costs incurred by patients and their households (TB-affected households) may worsen poverty and health. Extreme TB-associated costs have been termed "catastrophic" but are poorl[...]texto impreso
Wingfield, Tom ; Boccia, Delia ; Tovar, Marco A. ; Huff, Doug ; Montoya, Rosario ; Lewis, James J. ; Gilman, Robert H. ; Evans, Carlton A. | BMC | 2019-02-06T14:52:15ZBackground. Cash transfers are key interventions in the World Health Organisation’s post-2015 global TB policy. However, evidence guiding TB-specific cash transfer implementation is limited. We designed, implemented and refined a novel TB-specif[...]texto impreso
Dudley, Matthew Z. ; Sheen, Patricia ; Gilman, Robert H. ; Ticona, Eduardo ; Friedland, Jon S. ; Kirwan, Daniela E. ; Caviedes, Luz ; Rodriguez, Richard ; Cabrera, Lilia Z. ; Coronel, Jorge ; Grandjean, Louis ; Moore, David A. J. ; Evans, Carlton A. ; Huaroto, Luz ; Chavez-Perez, Victor ; Zimic, Mirko | American Society of Tropical Medicine and Hygiene | 2019-02-06T14:45:12ZHospital infection control measures are crucial to tuberculosis (TB) control strategies within settings caring for human immunodeficiency virus (HIV)-positive patients, as these patients are at heightened risk of developing TB. Pyrazinamide (PZA[...]texto impreso
Proaño, Alvaro ; Bravard, Marjory A. ; López, José W. ; Lee, Gwenyth O. ; Bui, David ; Datta, Sumona ; Comina, Germán ; Zimic, Mirko ; Coronel, Jorge ; Caviedes, Luz ; Cabrera, Jose L. ; Salas, Antonio ; Ticona, Eduardo ; Vu, Nancy M. ; Kirwan, Daniela E. ; Loader, Maria-Cristina I. ; Friedland, Jon S. ; Moore, David A. J. ; Evans, Carlton A. ; Tracey, Brian H. ; Gilman, Robert H. | Oxford University Press | 2019-01-25T16:59:37ZBackground: Cough is the major determinant of tuberculosis transmission. Despite this, there is a paucity of information regarding characteristics of cough frequency throughout the day and in response to tuberculosis therapy. Here we evaluate th[...]texto impreso
Metcalf, Tatiana ; Soria, Jaime ; Montano, Silvia M. ; Ticona, Eduardo ; Evans, Carlton A. ; Huaroto, Luz ; Kasper, Matthew ; Ramos, Eric S. ; Mori, Nicanor ; Jittamala, Podjanee ; Chotivanich, Kesinee ; Chavez, Irwin F. ; Singhasivanon, Pratap ; Pukrittayakamee, Sasithon ; Zunt, Joseph R. | Public Library of Science | 2018-11-30T03:10:46ZBACKGROUND: Meningitis caused by Mycobacterium tuberculosis is a major cause of morbidity and mortality worldwide. We evaluated the performance of cerebrospinal fluid (CSF) testing with the GeneXpert MTB/RIF assay versus traditional approaches f[...]texto impreso
texto impreso
WHO estimates that 1·6 million people die each year before or during tuberculosis treatment. In The Lancet Infectious Diseases , Kamila Romanowski and colleagues' 1 meta-analysis showed that tuberculosis survivors have approximately three-times[...]texto impreso
Kirwan, Daniela E. ; Ugarte-Gil, Cesar ; Gilman, Robert H. ; Hasan Rizvi, Syed M. ; Cerrillo, Gustavo ; Cok, Jaime ; Ticona, Eduardo ; Cabrera, Jose Luis ; Matos, Eduardo D. ; Evans, Carlton A. ; Moore, David A. J. ; Friedland, Jon S. ; Lymph Node Tuberculosis Working Group | American Society of Tropical Medicine and Hygiene | 2019-01-25T15:18:36ZThe differential diagnosis for lymphadenopathy is wide and clinical presentations overlap, making obtaining an accurate diagnosis challenging. We sought to characterize the clinical and radiological characteristics, histological findings, and di[...]texto impreso
Ticona, Eduardo ; Huaroto, Luz ; Kirwan, Daniela E. ; Chumpitaz, Milagros ; Munayco, Cesar V. ; Maguina, Monica ; Tovar, Marco A. ; Evans, Carlton A. ; Escombe, Roderick ; Gilman, Robert H. | American Society of Tropical Medicine and Hygiene | 2019-02-06T14:48:07ZMultidrug-resistant tuberculosis (MDRTB) rates in a human immunodeficiency virus (HIV) care facility increased by the year 2000-56% of TB cases, eight times the national MDRTB rate. We reported the effect of tuberculosis infection control measu[...]texto impreso
Datta, Sumona ; Saunders, Matthew J. ; Tovar, Marco A. ; Evans, Carlton A. | Public Library of Science | 2019-01-25T16:59:39ZIn a Perspective accompanying Sylvia and colleagues, Carlton Evans and colleagues discuss the challenge of squaring policies around tuberculosis diagnosis with the realities of clinical practice in small villages and low-resource settings.texto impreso
Shibabaw, Agumas ; Gelaw, Baye ; Kelley, Holden V. ; Tesfaye, Ephrem ; Balada-Llasat, Joan Miquel ; Evans, Carlton A. ; Torrelles, Jordi B. ; Wang, Shu-Hua ; Tessema, Belay | Elsevier | 2019-12-06T21:04:46ZBACKGROUND: Appropriate-technology tests are needed for Mycobacterium tuberculosis drug-susceptibility testing (DST) in resource-constrained settings. We evaluated the MDR/XDRTB colour plate thin-layer agar test (TB-CX) for M. tuberculosis DST [...]texto impreso
Kirwan, Daniela E. ; Ugarte-Gil, Cesar ; Gilman, Robert H. ; Caviedes, Luz ; Rizvi, Hasan ; Ticona, Eduardo ; Chavez, Gonzalo ; Cabrera, Jose Luis ; Matos, Eduardo D. ; Evans, Carlton A. ; Moore, David A. J. ; Friedland, Jon S. ; Lymph Node TB Working Group | American Society for Microbiology | 2019-02-06T14:52:38ZIn this study, 132 patients with lymphadenopathy were investigated. Fifty-two (39.4%) were diagnosed with tuberculosis (TB). The microscopic observation drug susceptibility (MODS) assay provided rapid (13 days), accurate diagnosis (sensitivity, [...]texto impreso
Saunders, Matthew J. ; Wingfield, Tom ; Tovar, Marco A. ; Herlihy, Niamh ; Rocha, Claudio ; Zevallos, Karine ; Montoya, Rosario ; Ramos, Eric ; Datta, Sumona ; Evans, Carlton A. | Wiley | 2018-11-30T17:17:15ZOBJECTIVES: Mobile phone interventions have been advocated for tuberculosis care, but little is known about access of target populations to mobile phones. We studied mobile phone access among patients with tuberculosis, focusing on vulnerable pa[...]texto impreso
Datta, Sumona ; Alvarado, Keren ; Gilman, Robert H. ; Valencia, Teresa ; Aparicio, Christian ; Ramos, Eric S. ; Montoya, Rosario ; Evans, Carlton A. | Public Library of Science | 2019-07-04T17:00:20ZBACKGROUND: Assessing Mycobacterium tuberculosis (TB) viability by fluorescein diacetate (FDA) microscopy can predict TB culture results, treatment response and infectiousness. However, diverse methods have been published. We aimed to optimise F[...]texto impreso
Saunders, Matthew J. ; Tovar, Marco A. ; Datta, Sumona ; Evans, Benjamin E. W. ; Wingfield, Tom ; Evans, Carlton A. | European Respiratory Society | 2018-12-03T17:04:41Ztexto impreso
Saunders, Matthew J. ; Wingfield, Tom ; Tovar, Marco A. ; Baldwin, Matthew R. ; Datta, Sumona ; Evans, Carlton A. | Elsevier | 2019-01-25T17:00:27Ztexto impreso
Proaño, Alvaro ; Bravard, Marjory A. ; Tracey, Brian H. ; López, José W. ; Comina, Germán ; Zimic, Mirko ; Coronel, Jorge ; Lee, Gwenyth O'Neil ; Caviedes, Luz ; Cabrera, Jose Luis ; Salas, Antonio ; Ticona, Eduardo ; Kirwan, Daniela E. ; Friedland, Jon S. ; Evans, Carlton A. ; Moore, David A. ; Gilman, Robert H. | BMJ Publishing Group | 2019-02-06T14:51:43ZINTRODUCTION: Cough is a key symptom of tuberculosis (TB) as well as the main cause of transmission. However, a recent literature review found that cough frequency (number of coughs per hour) in patients with TB has only been studied once, in 19[...]texto impreso
Datta, Sumona ; Gilman, Robert H. ; Montoya, Rosario ; Quevedo Cruz, Luz ; Valencia, Teresa ; Huff, Doug ; Saunders, Matthew J. ; Evans, Carlton A. | European Respiratory Society | 2020-07-14T00:01:06ZBACKGROUND: Global tuberculosis policy increasingly emphasises broad tuberculosis impacts and highlights the lack of evidence concerning tuberculosis-related quality of life (QOL). METHODS: Participants were recruited in 32 Peruvian communities [...]texto impreso
Wingfield, Tom ; Tovar, Marco A. ; Huff, Doug ; Boccia, Delia ; Montoya, Rosario ; Ramos, Eric ; Datta, Sumona ; Saunders, Matthew J. ; Lewis, James J. ; Gilman, Robert H. ; Evans, Carlton A. | World Health Organization | 2019-01-25T15:02:14ZOBJECTIVE: To evaluate the impact of socioeconomic support on tuberculosis preventive therapy initiation in household contacts of tuberculosis patients and on treatment success in patients. METHODS: A non-blinded, household-randomized, controlle[...]texto impreso
Saunders, Matthew J. ; Wingfield, Tom ; Tovar, Marco A. ; Baldwin, Matthew R. ; Datta, Sumona ; Zevallos, Karine ; Montoya, Rosario ; Valencia, Teresa R. ; Friedland, Jon S. ; Moulton, Larry H. ; Gilman, Robert H. ; Evans, Carlton A. | Elsevier | 2019-01-25T15:02:14ZBACKGROUND: Contacts of tuberculosis index cases are at increased risk of developing tuberculosis. Screening, preventive therapy, and surveillance for tuberculosis are underused interventions in contacts, particularly adults. We developed a scor[...]texto impreso
Bonadonna, Lily V. ; Saunders, Matthew J. ; Guio, Heinner ; Zegarra, Roberto ; Evans, Carlton A. | American Society of Tropical Medicine and Hygiene | 2018-11-30T22:50:37ZEarly detection and diagnosis of tuberculosis (TB) is a global priority. Prolonged symptom duration before TB diagnosis is associated with increased morbidity, mortality, and risk of transmission. We aimed to determine socioeconomic and behavior[...]texto impreso
Datta, Sumona ; Sherman, Jonathan M. ; Tovar, Marco A. ; Bravard, Marjory A. ; Valencia, Teresa ; Montoya, Rosario ; Quino, Willi ; D'Arcy, Nikki ; Ramos, Eric S. ; Gilman, Robert H. ; Evans, Carlton A. | Oxford University Press | 2019-01-25T16:03:21ZBackground: Sputum from patients with tuberculosis contains subpopulations of metabolically active and inactive Mycobacterium tuberculosis with unknown implications for infectiousness. Methods: We assessed sputum microscopy with fluorescein diac[...]texto impreso
Barletta, Francesca ; Vandelannoote, Koen ; Collantes, Jimena ; Evans, Carlton A. ; Arevalo, Jorge ; Rigouts, Leen | American Society of Tropical Medicine and Hygiene | 2020-06-10T18:11:35ZReal-time polymerase chain reaction (qPCR) was optimized for detecting Mycobacterium tuberculosis in sputum. Sputum was collected from patients (N = 112) with suspected pulmonary tuberculosis, tested by smear microscopy, decontaminated, and spli[...]texto impreso
Wingfield, Tom ; Tovar, Marco A. ; Huff, Doug ; Boccia, Delia ; Montoya, Rosario ; Ramos, Eric ; Lewis, James J. ; Gilman, Robert H. ; Evans, Carlton A. | European Respiratory Society | 2019-02-06T14:48:08ZThe End TB Strategy mandates that no tuberculosis (TB)-affected households face catastrophic costs due to TB. However, evidence is limited to evaluate socioeconomic support to achieve this change in policy and practice. The objective of the pres[...]texto impreso
Datta, Sumona ; Gonzales-Huerta, Luis E. ; Evans, Carlton A. | American Society of Tropical Medicine and Hygiene | 2018-12-03T17:02:45Ztexto impreso
Wingfield, Tom ; Schumacher, Samuel G. ; Sandhu, Gurjinder ; Tovar, Marco A. ; Zevallos, Karine ; Baldwin, Matthew R. ; Montoya, Rosario ; Ramos, Eric S. ; Jongkaewwattana, Chulanee ; Lewis, James J. ; Gilman, Robert H. ; Friedland, Jon S. ; Evans, Carlton A. | Oxford University Press | 2020-06-10T18:12:15ZBACKGROUND: Unlike other respiratory infections, tuberculosis diagnoses increase in summer. We performed an ecological analysis of this paradoxical seasonality in a Peruvian shantytown over 4 years. METHODS: Tuberculosis symptom-onset and diagn[...]texto impreso
Westerlund, Emma E. ; Tovar, Marco A. ; Lonnermark, Elisabet ; Montoya, Rosario ; Evans, Carlton A. | Elsevier | 2019-02-06T14:57:40ZOBJECTIVES: Tuberculosis is frequent among poor and marginalized people whose limited tuberculosis-related knowledge may impair healthcare access. We characterised tuberculosis-related knowledge and associations with delayed treatment and treatm[...]