Eisenberg Group - Environmental Determinants of Infectious Diseases

William Cevallos Trujillo, MD, MSc

Research Groups & Projects

Contact

Summary

Dr. Cevallos is a co-investigator and Project Director for the EcoDess Project in Ecuador. He has experience working on investigations of tropical diseases such as leishmaniasis and malaria, in both clinical and epidemiological aspects. He received his M.Sc. in Tropical Medicine from Fundao Oswaldo Cruz, Brazil in 2001.

Projects
>> Establishing a Causal Connection in the Transfer of Antibiotic Resistance Using stool samples collected in a previous study, we will extract E. coli DNA from each sample and create microarray chips.... More >>
>> Descriptive Study of the Presence of Antibiotic Resistance in the Environment This study aims to characterize the profile of antibiotic resistant E. coli bacteria in different environmental media.... More >>
>> Regional Surveillance of Antibiotic Resistance: A Serial Case-Control Study This study examines the regional scale surveillance of antibiotic resistance within humans and chickens in northern coastal Ecuador.... More >>
>> Social Network Structure and the Determinants of Pathogen Genetic Diversity A model was developed describing pathogen evolution within a social network.... More >>
>> Ecology of Antibiotic Use in Northern Coastal Ecuador We describe how the flow of antibiotics and their use varies by remoteness of community.... More >>
>> Regional Surveillance of Diarrheal Pathogens: A Serial Case-Control Study The construction of a new road in a previously roadless area of northern coastal Ecuador provides a valuable natural experiment to examine how changes in the social and natural environment, mediated by road construction, affect the epidemiology of diarrheal diseases.... More >>
>> Drinking Water Quality in Northern Coastal Ecuador This project examines issues in drinking water quality in northern coastal Ecuador using an observational study design.... More >>
>> Food Sharing Networks in Rural Coastal Ecuador: A Sociometric Study This study examines the relationship between remoteness of villages from a population center and the extent of clustering in food-sharing social networks, and the effects that these different network structures might have on transmissibility of food-borne pathogens.... More >>
>> Rotavirus Genotyping In this community-based case-control study, we examined the epidemiology of rotavirus in 22 rural communities in northern coastal Ecuador over a five-year period.... More >>
>> Giardia Genotyping The main goal of this study was to determine the genotypes of Giardia lamblia isolated from humans living in close proximity to animals in rural Ecuador and also to examine whether a higher percentage of asymptomatic and zoonotic genotypes were present in this area.... More >>
>> Escherichia coli Pathotype Genotyping Enteroinvasive Escherichia coli (EIEC) infection rates were examined in Ecuador using a community-based case-control study.... More >>
>> Diarrheal Disease Transmission Modeling Simulation modeling was used to evaluate the effectiveness of water quality interventions under varying community sanitation and hygiene conditions.... More >>
>> Taxonomy of Disease Causation This is an ethnoepidemiologic study of the variability in the taxonomy of diarrheal disease in northern coastal Ecuador.... More >>
>> Etiology of Diarrheal Disease in an Outpatient Health Clinic in Quito Data from this case-control study on diarrheal disease will be used to both look at which pathogens are causing diarrhea and what proportion of the diarrhea is being caused by the set of pathogens under study.... More >>
>> Antibiotic Resistance in Broiler Chickens in Northern Coastal Ecuador This study aims to characterize the dynamics of the emergence of antibiotic resistance in chickens.... More >>
>> Active Surveillance of Diarrheal Pathogens: A 4-Year Longitudinal Study These data are being used in two distinct analyses: First, to examine the difference between a cohort and cross-sectional design in assessing risks for diarrheal disease. Second, to conduct a detailed longitudinal analysis of diarrheal disease within the region over a four-year period.... More >>