A5020472691- Infection Control and Ventilation
- Infection Control in Healthcare
- Viral gastroenteritis research and epidemiology
- Fecal contamination and water quality
- Biosensors and Analytical Detection
- Food Safety and Hygiene
- Water Treatment and Disinfection
- SARS-CoV-2 detection and testing
- Medical Device Sterilization and Disinfection
- Legionella and Acanthamoeba research
- Parasitic Infections and Diagnostics
- Bacteriophages and microbial interactions
- Child Nutrition and Water Access
- Insect-Plant Interactions and Control
- Respiratory viral infections research
- Injury Epidemiology and Prevention
- Listeria monocytogenes in Food Safety
- Health Systems, Economic Evaluations, Quality of Life
- Indoor Air Quality and Microbial Exposure
- Water Systems and Optimization
- Urban Stormwater Management Solutions
- Insect Pest Control Strategies
- Salmonella and Campylobacter epidemiology
- Viral Infections and Immunology Research
- Clinical practice guidelines implementation
University of Arizona
2016-2025
United States Food and Drug Administration
2025
Center for Drug Evaluation and Research
2025
Rocky Mountain University of Health Professions
2024
Duke University
2024
University of Pittsburgh
2023
University of Cincinnati
2022
Northwestern University
2019-2020
Center for Environmental Health
2019
Riverside Methodist Hospital
2017
School climate is a leading factor in explaining student learning and achievement. Less work has explored the impact of both staff perceptions school raising interesting questions about whether experiences can add “value” to students’ In current research, multiple sources were integrated into multilevel model, including self-reports, objective records academic achievement socio-economic demographics. Achievement was assessed using national literacy numeracy tests (N = 760 2,257 students from...
From 1999 – 2003, the hygiene of 1061 environmental surfaces from shopping, daycare, and office environments, personal items, miscellaneous activities (i.e., gymnasiums, airports, movie theaters, restaurants, etc.), in four US cities, was monitored. Samples were analyzed for fecal total coliform bacteria, protein, biochemical markers. Biochemical markers, i.e., hemoglobin (blood marker), amylase (mucus, saliva, sweat, urine urea (urine sweat marker) detected on 3% (26/801); 15% (120/801), 6%...
Although the number of illnesses resulting from indirect viral pathogen transmission could be substantial, it is difficult to estimate relative risks because wide variation and uncertainty in human behavior, variable concentrations on fomites, other exposure factors. The purpose this study was evaluate micro-activity approach for assessment microbial risk by adapting a mathematical model probability infection transmission. To model, measurements phage loading fomites hands collected before...
Data below detection limits, left-censored data, are common in environmental microbiology, and decisions handling censored data may have implications for quantitative microbial risk assessment (QMRA). In this paper, we utilize simulated sets informed by real-world enterovirus water to evaluate methods data. were with four censoring degrees (low [10%], medium [35%], high [65%], severe [90%]) one real-life example (97%) assuming a lognormal distribution limit of (LOD) 2.3 genome copies/liter....
Human enteric viruses can be highly infectious and thus capable of causing disease upon ingestion low doses ranging from 100 to 102 virions. Norovirus is a good example with minimum dose as few tens virions, that is, below femtogram scale. detection commonly implicated environmental matrices (water food) involves complicated concentration and/or amplification the norovirus genome, rendering approaches not feasible for field applications. In this work, was performed on microfluidic paper...
Viral illnesses have a significant direct and indirect impact on the workplace that burdens employers with increased healthcare costs, low productivity, absenteeism. Workers' contact each other contaminated surfaces contributes to spread of viruses at work. This study quantifies an office wellness intervention (OWI) reduce viral load in workplace. The OWI includes use spray disinfectant high-touch providing workers alcohol-based hand sanitizer gel sanitizing wipes along user instructions....
Norovirus accounts for a large portion of the gastroenteritis disease burden, and outbreaks have occurred in wide variety environments. Understanding role fomites norovirus transmission will inform behavioral interventions, such as hand washing surface disinfection. The purpose this study was to estimate contribution fomite-mediated exposures infection illness risks outbreaks. A simulation model discrete time that accounted hand-to-porous surfaces, hand-to-nonporous hand-to-mouth, -eyes,...
This study applied the integrated cell culture/polymerase chain reaction methodology (ICC/PCR) for rapid and specific detection of both cytopathogenic noncytopathogenic viruses. Results this showed that use direct RT-PCR or conventional culture alone may yield erroneous results with analysis environmental samples. The purpose was to compare cultural, molecular, combined assays most effective method virus in variable Using ICC/PCR, stock enterovirus inocula > =10 PFU were PCR positive at...
1 Polyphagous predators, such as spiders and beetles, perform a fundamental ecosystem service regulators of agricultural pests, particularly aphids. They are most effective when they colonize the crop before pest has reached its exponential growth phase. However, this is also predators find themselves in state near-starvation. 2 Predator numbers can be enhanced by applications different types organic matter, but mechanism not clearly understood. One hypothesis that compost applied to field...
Abstract Smartphone image-based sensing of microfluidic paper analytical devices (μPADs) offers low-cost and mobile evaluation water quality. However, consistent quantification is a challenge due to variable environmental, paper, lighting conditions, especially across large multi-target μPADs. Compensations must be made for variations between images achieve reproducible results without separate enclosure. We thus developed simple method using triple-reference point normalization fast-Fourier...
Viral illnesses such as gastroenteritis and the common cold create a substantial burden in workplace due to reduced productivity, increased absenteeism, health care costs. Behaviors contribute spread of human viruses via direct contact between hands, contaminated surfaces, mouth, eyes, and/or nose. This study assessed whether implementation Healthy Workplace Project (HWP) (providing hand sanitizers, disinfecting wipes, facial tissues, use instructions) would reduce viral loads an office...
This study investigated healthcare workers’ perceptions of hand hygiene practices by comparing personal reports, as assessed questionnaires, to direct observations the practices. The employed a cross-sectional research design. Observations were made using 16-item checklist, based on three sources: Centers for Disease Control and Prevention (CDC), World Health Organization (WHO), Boyce Pittet’s guidelines hygiene. checklist was used both direct-observation self-reported data collection...