Publications by authors named "M Shane Hamman"
Article Synopsis
- - The study examines microplastics (MPs) in corals from three remote islands in the Indian Ocean, specifically focusing on six coral genera across a 1200 km area.
- - Average microplastic concentration was found to be 0.78 n/g, predominantly consisting of polypropylene (78%) and polyethylene (18%), with no significant differences between the islands.
- - This research is the first to report on microplastics in corals from the Western Indian Ocean, establishing a baseline for future studies and contributing to environmental monitoring and policy development.
Background And Aim: Methicillin-resistant (MRSA), an important opportunistic pathogen, is a Gram-positive coccus known to be resistant to β-lactam antibiotics. Its virulence depends on a large range of factors, mainly extracellular proteins, such as enzymes and exotoxins, that contribute to causing a wide range of diseases in human and animal species. The major reasons for the success of this pathogen are its great variability, which enables it to occur and thrive at different periods and places with diverse clonal types and antibiotic resistance patterns within regions and countries.
View Article and Find Full Text PDFAvailable COVID-19 data shows higher shares of cases and deaths occur among Black Americans, but reporting of data by race is poor. This paper investigates disparities in county-level mortality rates across counties with higher and lower than national average Black population shares using nonlinear regression decomposition and estimates potential differential impact of social distancing measures. I find counties with Black population shares above the national share have mortality rates 2 to 3 times higher than in other counties.
View Article and Find Full Text PDFObjective: The purpose of this study was to measure changes in the payer mix and incidence of emergency department (ED) opioid-related overdose encounters after an April 2014 expansion of Medicaid to childless adults led to a 43% increase in Medicaid coverage for men and 8% for women statewide.
Method: We explored two competing hypotheses using data visualization and comparative interrupted time-series analysis (CITS): (a) expanded eligibility for Medicaid is associated with a change in payer mix only and (b) sociodemographic groups that gained Medicaid eligibility were more likely to use ED services for opioid overdose. Data included encounters at all Wisconsin nonfederal hospitals over 23 quarters from 2010 to 2015 and American Community Survey estimates of pre- and post-policy Medicaid eligibility by sex and age.