Infectious Disease Commons^™

Infections Not Fought: Antibiotic Resistance In Underserved Communities, Derek Lillestolen

Senior Honors Theses

In 1928, the profound effects of penicillin were discovered and antibiotic treatments became extremely popular. Broad-spectrum antibiotics, like tetracyclines, have been since branded as cure-all prescriptions and used profusely in the Western World and abroad. Due to ignorance of specific biochemical mechanisms and the misuse of antibiotics these drugs inadvertently allowed the rise in prevalence of antibiotic resistant strains of certain bacteria as the century progressed. Now, the specific genetic causes and mechanisms of antibiotic resistance are being understood, but the fight against antimicrobial resistance is far from over. In the United States, thousands of fatalities are caused annually by …

The Prevention And Management Of Hospital Acquired Infections, Sofia Rahmanzai

Theses/Capstones/Creative Projects

Hospital acquired infections, or HAIs, appear in patients during treatment and are unrelated to the original illness. These infections occur at least 48 hours after hospital admission or 30 days after discharge. With over 700,000 individuals directly affected by HAIs, more attention needs to go into prevention and surveillance. It has been reported that some health care facilities have reduced HAIs by up to 70%. However, this will take a conscious effort from all healthcare facilities, care teams, physicians and nurses. Some possible solutions include infection prevention, increasing surveillance, and improving staff education and accountability. Despite these efforts, no institution …

Febrile Rhinovirus Illness During Pregnancy Is Associated With Low Birth Weight In Nepal., Erin K Philpott, Janet A Englund, Joanne Katz, James Tielsch, Subarna Khatry, Stephen C Leclerq, Laxman Shrestha, Jane Kuypers, Amalia S Magaret, Mark C Steinhoff, Helen Y Chu

Global Health Faculty Publications

BACKGROUND: Adverse birth outcomes, including low birth weight (LBW), defined as <2500 >grams, small-for-gestational-age (SGA), and prematurity, contribute to 60%-80% of infant mortality worldwide and may be related to infections during pregnancy. The aim of this study was to assess whether febrile human rhinovirus (HRV) illness is associated with adverse birth outcomes.

METHODS: Active household-based weekly surveillance was performed for respiratory illness episodes in pregnant women as part of a community-based, prospective, randomized trial of maternal influenza immunization in rural Nepal. Rhinovirus (HRV) febrile illness episodes were defined as fever plus cough, sore throat, runny nose, and/or myalgia with HRV detected …

Global Health Experience In Swaziland, Anik Patel

Posters

Describes a global health learning experience at the Baylor Center of Excellence in Swaziland, where diagnosis and treatment of HIV/AIDS and TB, along with maternal health, women's health, and adolescent care are provided.

Swaziland: A Journey Into Culture And Health Care, Claire Hickey

Posters

Describes a global health learning experience with Baylor International Pediatrics AIDS Initiative in Swaziland in 2017.

Sanibonani! A Global Health View Of The Hiv/Aids Epidemic In Swaziland, Angie Schmidt

Posters

Describes a global health learning experience with the Baylor International Pediatric AIDS Initiative in Swaziland.

South Africa: Combatting The Rise Of Hiv In Adolescents, Ryan Northrup

Posters

Describes a global health learning experience in South Africa in 2017, focused on educating teenagers in schools about sexual health and AIDS prevention.

Hiv Vaccines: Progress, Limitations And A Crispr/Cas9 Vaccine, Omar A. Garcia Martinez

Biology: Student Scholarship & Creative Works

ABSTRACT: The HIV-1 pandemic continues to thrive due to ineffective HIV-1 vaccines. Historically, the world’s most infectious diseases, such as polio and smallpox, have been eradicated or have come close to eradication due to the advent of effective vaccines. Highly active antiretroviral therapy is able to delay the onset of AIDS but can neither rid the body of HIV-1 proviral DNA nor prevent further transmission. A prophylactic vaccine that prevents the various mechanisms HIV-1 has to evade and attack our immune system is needed to end the HIV-1 pandemic. Recent advances in engineered nuclease systems, like the CRISPR/Cas9 system, have …

Nested Partially-Latent, Class Models For Dependent Binary Data, Estimating Disease Etiology, Zhenke Wu, Maria Deloria-Knoll, Scott L. Zeger

Johns Hopkins University, Dept. of Biostatistics Working Papers

The Pneumonia Etiology Research for Child Health (PERCH) study seeks to use modern measurement technology to infer the causes of pneumonia for which gold-standard evidence is unavailable. The paper describes a latent variable model designed to infer from case-control data the etiology distribution for the population of cases, and for an individual case given his or her measurements. We assume each observation is drawn from a mixture model for which each component represents one cause or disease class. The model addresses a major limitation of the traditional latent class approach by taking account of residual dependence among multivariate binary outcome …

Characterizing Ebola Transmission Patterns Based On Internet News Reports., J. C. Cleaton, Cecile Viboud, Lone Simonsen, A. M. Hurtado, G. Chowell

Global Health Faculty Publications

BACKGROUND:  Detailed information on patient exposure, contact patterns, and discharge status, is rarely available in real time from traditional surveillance systems in the context of an emerging infectious disease outbreak. Here we validate the systematic collection of Internet news reports to characterize epidemiological patterns of Ebola virus disease (EVD) infections during the West African 2014-2015 outbreak.

METHODS:  Based on 58 news reports, we analyzed a total of 79 EVD clusters (286 cases) of size ranging from 1 to 33 cases between January 2014 and February 2015 in Guinea, Sierra Leone and Liberia.

RESULTS AND CONCLUSIONS:  The great majority of reported …

Rush To Judgment: The Sti-Treatment Trials And Hiv In Sub-Saharan Africa, Eileen Stillwaggon, Larry Sawers

Economics Faculty Publications

Introduction: The extraordinarily high incidence of HIV in sub-Saharan Africa led to the search for cofactor infections that could explain the high rates of transmission in the region. Genital inflammation and lesions caused by sexually transmitted infections (STIs) were a probable mechanism, and numerous observational studies indicated several STI cofactors. Nine out of the ten randomized controlled trials (RCTs), however, failed to demonstrate that treating STIs could lower HIV incidence. We evaluate all 10 trials to determine if their design permits the conclusion, widely believed, that STI treatment is ineffective in reducing HIV incidence.

Discussion: Examination of the …

Partially-Latent Class Models (Plcm) For Case-Control Studies Of Childhood Pneumonia Etiology, Zhenke Wu, Maria Deloria-Knoll, Laura L. Hammitt, Scott L. Zeger

Johns Hopkins University, Dept. of Biostatistics Working Papers

In population studies on the etiology of disease, one goal is the estimation of the fraction of cases attributable to each of several causes. For example, pneumonia is a clinical diagnosis of lung infection that may be caused by viral, bacterial, fungal, or other pathogens. The study of pneumonia etiology is challenging because directly sampling from the lung to identify the etiologic pathogen is not standard clinical practice in most settings. Instead, measurements from multiple peripheral specimens are made. This paper considers the problem of estimating the population etiology distribution and the individual etiology probabilities. We formulate the scientific …

A Mathematical Model For Dengue Fever In A Virgin Environment, Jason K. Bowman

Senior Honors Projects

Dengue is a mosquito-borne viral infection found in tropical and subtropical regions around the world. The disease was named in 1779 and the first recorded epidemic of it occurred simultaneously on three continents within the following decade. Dengue is characterized by flu-like symptoms and, while its symptoms are generally reported as quite unpleasant, is rarely fatal. However, in some cases patients can contract a more serious form of the disease, known as Dengue Hemorrhagic Fever, which is far more dangerous. The World Health Organization estimates that today over 2.5 billion people are at risk for Dengue (over 40% of the …

Infectious Disease As A Security Threat, With Particular Application To The Migration Context, Marielena Faria

Independent Study Project (ISP) Collection

This paper analyzes the threat infectious diseases impose on global security, specifically in the migration context. Infectious diseases can threaten security through a variety of areas, and this paper aims to identify the global spread of infectious diseases through migration, international crises, humanitarian emergencies, HIV/AIDS, and emerging and re-emerging infectious diseases. This paper explores global health, security, and migration in an attempt to determine if combining these three areas can be meaningful. Generally, studies approach only two of the three areas to examine a topic, but this paper will assess and point out when combining all three fields is relevant. …

Hiv And Concurrent Sexual Partnerships: Modelling The Role Of Coital Dilution, Larry Sawers, Alan G. Isaac, Eileen Stillwaggon

Economics Faculty Publications

Background: The concurrency hypothesis asserts that high prevalence of overlapping sexual partnerships explains extraordinarily high HIV levels in sub-Saharan Africa. Earlier simulation models show that the network effect of concurrency can increase HIV incidence, but those models do not account for the coital dilution effect (nonprimary partnerships have lower coital frequency than primary partnerships).

Methods: We modify the model of Eaton et al (AIDS and Behavior, September 2010) to incorporate coital dilution by assigning lower coital frequencies to non-primary partnerships. We parameterize coital dilution based on the empirical work of Morris et al (PLoS ONE, December …

Integrating Tuberculosis Case Finding And Treatment Into Postnatal Care, Charity Ndwiga, Harriet Birungi, Chi-Chi Undie, Shiphrah Kuria, Joseph Sitienei, Sam Ochola

Reproductive Health

Under the USAID funded FRONTIERS program, the Population Council conducted a study in six health facilities in Western Kenya that demonstrated that screening for TB within an antenatal care (ANC) setting is feasible and acceptable among the service providers. However, a major challenge remains: although TB detection is encouraged among ANC clients within the maternal and child health clinics in the country, providers in these settings fail to appreciate the need for a continuum of care from pregnancy through to the postnatal period. In order to address this gap, the APHIA II Operations Research Project developed and tested an intervention …

Referral Mechanism Improves Uptake Of Art Services For Hiv+ Fp Clients, Population Council

Reproductive Health

An operations research intervention by the Population Council in Kenya aimed to design a referral framework for linking HIV‐positive family planning (FP) clients to treatment and care in selected health facilities. The project also assessed the acceptability and effectiveness in increasing the number of eligible HIV‐positive FP clients receiving HIV care and treatment services. This summary details the effort to improve the linkage between FP services and comprehensive care centers that led to a dramatic increase in the proportions of HIV-positive clients in FP clinics who go on to receive HIV/AIDS treatment and care services at the same facility. Recommendations …

Training Service Providers Increases Tb Screening In Postnatal Care, Population Council

Reproductive Health

This document summarizes a Population Council operations research project undertaken in collaboration with the Kenya Ministry of Health to develop and pilot-test an intervention to improve TB screening, case detection, treatment, and care among postnatal clients. The intervention demonstrated that it is feasible to use postnatal care services as a platform to increase TB screening and case detection. Training providers, giving them job-aids, and strengthening client flow within the facility also improved the overall quality of care that the clients received. The actual number of cases of TB detected was extremely low, however; thus the report recommends that the Ministry …

Reproductive Tract Infections: A Guide For Programme Managers, Sarah Hawkes, Anjali Nayyar, Johannes Van Dam, Kevin R. O'Reilly, Bidia Deperthes, Dinesh Agarwal

Reproductive Health

Reproductive tract infections (RTIs) including sexually transmitted infections represent a silent worldwide pandemic that adversely impacts the reproductive health (RH) of women and men. Various community- and hospital-based studies in India have provided insights into the magnitude of the problem. The International Conference on Population and Development (1994) emphasized integration of RH services to meet the needs of men and women especially with prevention and management of RTIs/STIs. The emergence of HIV and the identification of STIs as a risk factor for the spread of HIV have further lent a sense of urgency for a programmatic response to address this …