Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 9 of 9
Full-Text Articles in Entire DC Network
Spatial Heterogeneity Of Enteric Fever In 2 Diverse Communities In Nepal, Dipesh Tamrakar, Krista Vaidya, Alexander T. Yu, Kristen Aiemjo, Shiva Ram Naga, Yanjia Cao, Caryn Bern, Rajeev Shrestha, Biraj M. Karmacharya, Farah Naz Qamar
Spatial Heterogeneity Of Enteric Fever In 2 Diverse Communities In Nepal, Dipesh Tamrakar, Krista Vaidya, Alexander T. Yu, Kristen Aiemjo, Shiva Ram Naga, Yanjia Cao, Caryn Bern, Rajeev Shrestha, Biraj M. Karmacharya, Farah Naz Qamar
Department of Paediatrics and Child Health
Background: Typhoid fever is endemic in the urban Kathmandu Valley of Nepal; however, there have been no population-based studies of typhoid outside of this community in the past 3 decades. Whether typhoid immunization should be prioritized in periurban and rural communities has been unclear.
Methods: We performed population-based surveillance for enteric fever in 1 urban catchment (Kathmandu) and 1 periurban and rural catchment (Kavrepalanchok) as part of the Surveillance for Enteric Fever in Asia Project (SEAP). We recruited individuals presenting to outpatient and emergency departments at 2 study hospitals with suspected enteric fever and performed blood cultures. Additionally, we conducted …
A Cluster-Based, Spatial-Sampling Method For Assessing Household Healthcare Utilization Patterns In Resource-Limited Settings, Alexander T. Yu, Rajani Shakya, Bikram Adhikari, Dipesh Tamraka, Krista Vaidya, Stace Maples, Kashmira Date, Isaac I. Bogoch, Farah Naz Qamar, Mohammad Tahir Yousafzai
A Cluster-Based, Spatial-Sampling Method For Assessing Household Healthcare Utilization Patterns In Resource-Limited Settings, Alexander T. Yu, Rajani Shakya, Bikram Adhikari, Dipesh Tamraka, Krista Vaidya, Stace Maples, Kashmira Date, Isaac I. Bogoch, Farah Naz Qamar, Mohammad Tahir Yousafzai
Department of Paediatrics and Child Health
Background: Implementation of population-based surveys is resource intensive and logistically demanding, especially in areas with rapidly changing demographics and incomplete or no enumeration of the underlying population and their residences. To remove the need for pre-enumeration and to simplify field logistics for the population healthcare utilization survey used for the Surveillance for Enteric Fever in Asia Project in Nepal, we incorporated a geographic information system-based geosurvey and field mapping system into a single-stage cluster sampling approach.
Methods: A survey was administered to ascertain healthcare-seeking behavior in individuals with recent suspected enteric fever. Catchment areas were based on residential addresses of …
Utilization Of Blood Culture In South Asia For The Diagnosis And Treatment Of Febrile Illness, Caitlin Hemlock, Stephen P. Luby, Shampa Saha, Farah Naz Qamar, Jason R. Andrews, Samir K. Saha, Dipesh Tamrakar, Kashmira Date, Ashley T. Longley, Denise O. Garrett, Isaac I. Bogoch
Utilization Of Blood Culture In South Asia For The Diagnosis And Treatment Of Febrile Illness, Caitlin Hemlock, Stephen P. Luby, Shampa Saha, Farah Naz Qamar, Jason R. Andrews, Samir K. Saha, Dipesh Tamrakar, Kashmira Date, Ashley T. Longley, Denise O. Garrett, Isaac I. Bogoch
Department of Paediatrics and Child Health
Background: Blood culture is the current standard for diagnosing bacteremic illnesses, yet it is not clear how physicians in many low- and middle-income countries utilize blood culture for diagnostic purposes and to inform treatment decisions.
Methods: We screened suspected enteric fever cases from 6 hospitals in Bangladesh, Nepal, and Pakistan, and enrolled patients if blood culture was prescribed by the treating physician. We used generalized additive regression models to analyze the probability of receiving blood culture by age, and linear regression models to analyze changes by month to the proportion of febrile cases prescribed a blood culture compared with the …
Typhoid And Paratyphoid Cost Of Illness In Pakistan: Patient And Health Facility Costs From The Surveillance For Enteric Fever In Asia Project Ii, Nelly Mejia, Farah Naz Qamar, Mohammad Tahir Yousafzai, Jamal Raza, Denise O. Garrett, Kashmira Date, Taiwo Abimbola, Sarah W. Pallas
Typhoid And Paratyphoid Cost Of Illness In Pakistan: Patient And Health Facility Costs From The Surveillance For Enteric Fever In Asia Project Ii, Nelly Mejia, Farah Naz Qamar, Mohammad Tahir Yousafzai, Jamal Raza, Denise O. Garrett, Kashmira Date, Taiwo Abimbola, Sarah W. Pallas
Department of Paediatrics and Child Health
Background: The objective of this study was to estimate the cost of illness from enteric fever (typhoid and paratyphoid) at selected sites in Pakistan.
Methods: We implemented a cost-of-illness study in 4 hospitals as part of the Surveillance for Enteric Fever in Asia Project (SEAP) II in Pakistan. From the patient and caregiver perspective, we collected direct medical, nonmedical, and indirect costs per case of enteric fever incurred since illness onset by phone after enrollment and 6 weeks later. From the health care provider perspective, we collected data on quantities and prices of resources used at 3 of the hospitals, …
Illness Severity And Outcomes Among Enteric Fever Cases From Bangladesh, Nepal, And Pakistan: Data From The Surveillance For Enteric Fever In Asia Project, 2016-2019, Ashley T. Longley, Caitlin Hemlock, Kashmira Date, Stephen P. Luby, Jason R. Andrews, Samir K. Saha, Isaac I. Bogoch, Mohammad Tahir Yousafzai, Denise O. Garrett, Farah Naz Qamar
Illness Severity And Outcomes Among Enteric Fever Cases From Bangladesh, Nepal, And Pakistan: Data From The Surveillance For Enteric Fever In Asia Project, 2016-2019, Ashley T. Longley, Caitlin Hemlock, Kashmira Date, Stephen P. Luby, Jason R. Andrews, Samir K. Saha, Isaac I. Bogoch, Mohammad Tahir Yousafzai, Denise O. Garrett, Farah Naz Qamar
Department of Paediatrics and Child Health
Background: Enteric fever can lead to prolonged hospital stays, clinical complications, and death. The Surveillance for Enteric Fever in Asia Project (SEAP), a prospective surveillance study, characterized the burden of enteric fever, including illness severity, in selected settings in Bangladesh, Nepal, and Pakistan. We assessed disease severity, including hospitalization, clinical complications, and death among SEAP participants.
Methods: We analyzed clinical and laboratory data from blood culture-confirmed enteric fever cases enrolled in SEAP hospitals and associated network laboratories from September 2016 to September 2019. We used hospitalization and duration of hospital stay as proxies for severity. We conducted a follow-up interview …
Diagnostic Value Of Clinical Features To Distinguish Enteric Fever From Other Febrile Illnesses In Bangladesh, Nepal, And Pakistan, Kristen Aiemjoy, Dipesh Tamrakar, Shampa Saha, Shiva R. Naga, Alexander T. Yu, Ashley Longley, Kashmira Date, Caitlin Hemlock, Farah Naz Qamar, Samir K. Saha
Diagnostic Value Of Clinical Features To Distinguish Enteric Fever From Other Febrile Illnesses In Bangladesh, Nepal, And Pakistan, Kristen Aiemjoy, Dipesh Tamrakar, Shampa Saha, Shiva R. Naga, Alexander T. Yu, Ashley Longley, Kashmira Date, Caitlin Hemlock, Farah Naz Qamar, Samir K. Saha
Department of Paediatrics and Child Health
Background: Enteric fever, a bacterial infection caused by Salmonella enterica serotypes Typhi and Paratyphi A, frequently presents as a nonlocalizing febrile illness that is difficult to distinguish from other infectious causes of fever. Blood culture is not widely available in endemic settings and, even when available, results can take up to 5 days. We evaluated the diagnostic performance of clinical features, including both reported symptoms and clinical signs, of enteric fever among patients participating in the Surveillance for Enteric Fever in Asia Project (SEAP), a 3-year surveillance study in Bangladesh, Nepal, and Pakistan.
Methods: Outpatients presenting with ≥3 consecutive days …
Healthcare Utilization Patterns For Acute Febrile Illness In Bangladesh, Nepal, And Pakistan: Results From The Surveillance For Enteric Fever In Asia Project, Jason R. Andrews, Krista Vaidya, Shampa Saha, Mohammad Tahir Yousafzai, Caitlin Hemlock, Ashley Longley, Kristen Aiemjoy, Alexander T. Yu, Isaac I. Bogoch, Farah Naz Qamar
Healthcare Utilization Patterns For Acute Febrile Illness In Bangladesh, Nepal, And Pakistan: Results From The Surveillance For Enteric Fever In Asia Project, Jason R. Andrews, Krista Vaidya, Shampa Saha, Mohammad Tahir Yousafzai, Caitlin Hemlock, Ashley Longley, Kristen Aiemjoy, Alexander T. Yu, Isaac I. Bogoch, Farah Naz Qamar
Department of Paediatrics and Child Health
Background: Characterizing healthcare-seeking patterns for acute febrile illness is critical for generating population-based enteric fever incidence estimates from facility-based surveillance data.
Methods: We used a hybrid model in the Surveillance for Enteric Fever in Asia Project (SEAP) to assess incidence of enteric fever at 6 study hospitals in 3 countries. We recruited individuals presenting to the hospitals and obtained blood cultures to evaluate for enteric fever. For this analysis, we undertook cluster random household surveys in Dhaka, Bangladesh (2 sites); Karachi, Pakistan; Kathmandu, Nepal; and Kavrepalanchok, Nepal between January 2017 and February 2019, to ascertain care-seeking behavior for individuals with …
Antibiotic Use Prior To Hospital Presentation Among Individuals With Suspected Enteric Fever In Nepal, Bangladesh, And Pakistan, Krista Vaidya, Kristen Aiemjoy, Farah Naz Qamar, Samir K. Saha, Dipesh Tamrakar, Shiva R. Naga, Shampa Saha, Caitlin Hemlock, Ashley T. Longley, Kashmira Date
Antibiotic Use Prior To Hospital Presentation Among Individuals With Suspected Enteric Fever In Nepal, Bangladesh, And Pakistan, Krista Vaidya, Kristen Aiemjoy, Farah Naz Qamar, Samir K. Saha, Dipesh Tamrakar, Shiva R. Naga, Shampa Saha, Caitlin Hemlock, Ashley T. Longley, Kashmira Date
Department of Paediatrics and Child Health
Background: Antibiotic use prior to seeking care at a hospital may reduce the sensitivity of blood culture for enteric fever, with implications for both clinical care and surveillance. The Surveillance for Enteric Fever in Asia Project (SEAP) is a prospective study of enteric fever incidence in Nepal, Bangladesh, and Pakistan. Nested within SEAP, we evaluated the accuracy of self-reported antibiotic use and investigated the association between antibiotic use and blood culture positivity.
Methods: Between November 2016 and April 2019, we collected urine samples among a subset of SEAP participants to test for antibiotic use prior to the hospital visit using …
Environmental Surveillance As A Tool For Identifying High-Risk Settings For Typhoid Transmission, Jason R. Andrews, Alexander T. Yu, Senjuti Saha, Jivan Shakya, Kristen Aiemjoy, Lily Horng, Farah Qamar, Denise Garret, Stephen Baker, Samir Saha, Stephen P. Luby
Environmental Surveillance As A Tool For Identifying High-Risk Settings For Typhoid Transmission, Jason R. Andrews, Alexander T. Yu, Senjuti Saha, Jivan Shakya, Kristen Aiemjoy, Lily Horng, Farah Qamar, Denise Garret, Stephen Baker, Samir Saha, Stephen P. Luby
Department of Paediatrics and Child Health
Enteric fever remains a major cause of morbidity in developing countries with poor sanitation conditions that enable fecal contamination of water distribution systems. Historical evidence has shown that contamination of water systems used for household consumption or agriculture are key transmission routes for Salmonella Typhi and Salmonella Paratyphi A. The World Health Organization now recommends that typhoid conjugate vaccines (TCV) be used in settings with high typhoid incidence; consequently, governments face a challenge regarding how to prioritize typhoid against other emerging diseases. A key issue is the lack of typhoid burden data in many low- and middle-income countries where TCV …