In a letter to The New England Journal of Medicine, published online March 23, 2021, a group of investigators from University of California San Diego School of Medicine and the David Geffen School of Medicine at UCLA report COVID-19 infection rates for a cohort of health care workers previously vaccinated for the novel coronavirus. "Because of the compulsory daily symptom screening of health care personnel, patients, and visitors, and the high testing capacity at both UC San Diego Health and UCLA Health, we were able to identify symptomatic and asymptomatic infections among health care workers at our institutions," said co-author ...

Boulder, Colo., USA: When geobiology graduate student Katie Maloney trekked into the mountains of Canada's remote Yukon territory, she was hoping to find microscopic fossils of early life. Even with detailed field plans, the odds of finding just the right rocks were low. Far from leaving empty-handed, though, she hiked back out with some of the most significant fossils for the time period. Eukaryotic life (cells with a DNA-containing nucleus) evolved over two billion years ago, with photosynthetic algae dominating the playing field for hundreds of millions of years as oxygen accumulated in the Earth's atmosphere. Geobiologists think that algae evolved first in freshwater environments ...

Over the past decades, the increased use of chemicals in many areas led to environmental pollution - of water, soil and also wildlife. In addition to plant protection substances and human and veterinary medical drugs, rodenticides have had toxic effects on wildlife. A new scientific investigation from scientists of the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW), the Julius Kühn Institute (JKI) and the German Environment Agency (Umweltbundesamt - UBA) demonstrate that these substances are widely found in liver tissues of birds of prey from Germany. Anticoagulant rodenticides, commonly used to kill rodents in agriculture and forestry, were frequently detected, particularly in birds of prey close to or in urban environments. ...

DALLAS - March 23, 2021 - Vaccinating health care workers resulted in an immediate and notable reduction of positive COVID-19 cases among employees, reducing the number of required isolations and quarantines by more than 90 percent, according to data at UT Southwestern Medical Center published in the New England Journal of Medicine. Health care workers were among the first groups to be eligible for vaccination. "Real-world experience with SARS-CoV-2 vaccination at UT Southwestern demonstrated a marked reduction in the incidence of infections among our employees, preserving the workforce when it was most needed," notes Daniel K. Podolsky, M.D., president of UT Southwestern and senior author. During ...

ITHACA, N.Y. - New research from Mildred Warner, professor of city and regional planning at Cornell University, shows that state laws designed to hinder union activity and indulge corporate entities do not enhance economic productivity. "We find that where state policy is captured by corporate interests, this undermines inclusive growth," Warner said. "These interests see union and city power as a threat, which is why there are groups like the American Legislative Exchange Council, for example, focused on crafting state laws that erode labor protections and enhance corporate interests." The ...

California's restrictions on vehicle emissions have been so effective that in at least one urban area, Los Angeles, the most concerning source of dangerous aerosol pollution may well be trees and other green plants, according to a new study by University of California, Berkeley, chemists. Aerosols -- particles of hydrocarbons referred to as PM2.5 because they are smaller than 2.5 microns in diameter and easily lodge in the lungs -- are proven to cause cardiovascular and respiratory problems. As a result of strict vehicle emissions laws, organic aerosol levels have been significantly reduced throughout the United States, but the drop has been particularly dramatic ...

Understanding the evolution of the polar sea ice is not enough to study the effects of the climate change on marine ecosystems in Antarctic seafloors. It is also necessary to determine the intensity of phytoplankton local production during the Antarctic summer, as stated in a new study by a research team of the Faculty of Biology and the Biodiversity Research Institute (IRBio) of the University of Barcelona, published in the journal Marine Environmental Research. When the sea freezes in Antarctica Extremely low temperatures, strong ocean currents and the broad seasonal coverage of marine ice are factors that determine the features of the Antarctic marine ecosystems. IN particular, the seasonality ...

The rate of sea-level rise in the 20th century along much of the U.S. Atlantic coast was the fastest in 2,000 years, and southern New Jersey had the fastest rates, according to a Rutgers-led study. The global rise in sea-level from melting ice and warming oceans from 1900 to 2000 led to a rate that's more than twice the average for the years 0 to 1800 - the most significant change, according to the study in the journal Nature Communications. The study for the first time looked at the phenomena that contributed to sea-level change over 2,000 years at six sites along the coast (in Connecticut, New York City, New Jersey and North Carolina), using a sea-level budget. A budget enhances ...

Researchers at North Carolina State University have designed and demonstrated a new system that allows them to remotely monitor the behavior of freshwater mussels. The system could be used to alert researchers to the presence of toxic substances in aquatic ecosystems. "When mussels feed, they open their shells; but if there's something noxious in the water, they may immediately close their shells, all at once," says Jay Levine, co-author of a paper on the work and a professor of epidemiology at NC State. "Folks have been trying to find ways to measure how widely mussels or oysters open their shells off and on since the 1950s, but there have been a wide variety ...

All viruses mutate as they make copies of themselves to spread and thrive. SARS-CoV-2, the virus the causes COVID-19, is proving to be no different. There are currently more than 4,000 variants of COVID-19, which has already killed more than 2.7 million people worldwide during the pandemic. The UK variant, also known as B.1.1.7, was first detected in September 2020, and is now causing 98 percent of all COVID-19 cases in the United Kingdom. And it appears to be gaining a firm grip in about 100 other countries it has spread to in the past several months, including France, Denmark, and the United States. The World Health Organization says B.1.1.7 is one of several variants of concern along with others that have emerged in South Africa and Brazil. "The UK, ...

Many organisms use sunlight to fuel cellular functions. But exactly how does this conversion of solar energy into chemical energy unfold? In a recent experiment, an international team of scientists, including two researchers from UWM, sought answers using an advanced imaging technique called time-resolved serial femtosecond crystallography to watch a pigment found in some marine bacteria as it was exposed to sunlight outside the cell. For this experiment, the researchers documented, for the first time, the dynamics of the "chloride ion-pumping rhodopsin," an atomic "pump," which is jump-started by sunlight and moves chloride ions unidirectionally into the ...

DALLAS - March 23, 2021 - It's not just your legs and heart that get a workout when you walk briskly; exercise affects your brain as well. A new study by researchers at UT Southwestern shows that when older adults with mild memory loss followed an exercise program for a year, the blood flow to their brains increased. The results were published online today in the Journal of Alzheimer's Disease. "This is part of a growing body of evidence linking exercise with brain health," says study leader Rong Zhang, Ph.D., professor of neurology at UTSW. "We've shown for the first time in a randomized ...

A study of ancient bones shows that Early Neolithic sheep-breeders were faced with high levels of mortality among young animals in their herds. A statistical model, partly developed at Ludwig-Maximilians-Universitaet (LMU) in Munich, allowed the age distribution of the bones to be precisely determined. In the 8th millennium BCE, early sheep-herders were already aware that the conditions under which their animals were housed had an impact on mortality rates among the lambs. This one result of a study researchers led by Nadja Pöllath (a curator at the State Collection for Anthropology and Palaeoanatomy in Munich), LMU zooarchaeologist Joris Peters (who is also the Director of the state collection) ...

The BioRescue consortium develops and applies new technological approaches as a last straw for saving critically endangered species such as the northern white rhinoceros. Advanced Assisted Reproductive Technologies (aART) push the boundaries of what can be done to create new offspring. Consequently, new ethical questions regarding the application of these tools arise and need to be answered, and relevant animal welfare issues to be addressed. In order to ensure that the ethical risk assessment matches the technological breakthrough with aART, the BioRescue ...

Despite guidelines promoting outpatient management of patients with low-risk pulmonary embolism (PE), few patients are currently discharged home from hospital emergency departments in the United States. That is the conclusion of a study titled Outpatient Management of Patients Following Diagnosis of Acute Pulmonary Embolism, published in the March 2021 issue of Academic Emergency Medicine (AEM), a journal of the Society for Academic Emergency Medicine (SAEM). The retrospective cohort study of more than 61,000 patients treated at 740 acute care United States emergency departments during a two-year period sought to determine disposition practices and subsequent health care utilization in patients with acute PE. According to the findings, ...

A study co-authored by researchers at the Johns Hopkins Bloomberg School of Public Health found that telehealth consults among privately insured working-age patients accounted for almost 24 percent of outpatient consults with health care providers during the early phase of the pandemic, March to June 2020, up from less than 0.3 percent during the same period in 2019. The dramatic shift occurred as many medical practices halted or curtailed in-person office hours and patients stayed away from doctor's offices out of fear of transmission during the early months of the pandemic. At the same time, insurance companies and the federal government relaxed policies around telehealth to meet demand for remote medical consults ...

Most people relate cholesterol to heart health, but it is also a critical component in the growth and spread of brain cancer. VCU Massey Cancer Center researcher Suyun Huang, Ph.D., recently discovered how cholesterol becomes dysregulated in brain cancer cells and showed that the gene responsible for it could be a target for future drugs. The mean survival of patients with the most common and aggressive type of brain cancer, glioblastoma multiforme (GBM), is 14 months. The need to find new, effective treatments is urgent and has driven Huang, a member of the Cancer Biology research program at Massey, to detail ...

Some 40% of critically ill patients who undergo tracheal intubation to support their breathing suffer a life-threatening complication, research from National University of Ireland Galway has revealed. The study, published today in JAMA: The Journal of the American Medical Association, involved 2,964 critically ill men and women. It was carried out across 29 countries from 1 October 2018 to 31 July 2019 to determine the risk of adverse events arising from the invasive procedure. John Laffey, Professor of Intensive Care Medicine at NUI Galway and Consultant in ...

HOUSTON - (March 23, 2021) - Fish that dine on corals may pay it forward with poop. It's an unexpected twist on coral reef symbiosis, said Rice University marine biologist Adrienne Correa, whose lab discovered coral predator feces are jam-packed with living symbiotic algae that corals depend on for survival. The discovery confirms that poop from coral-eating fish is an important environmental source of symbiotic dinoflagellate algae on coral reefs. Correa said coral-eating predators are typically thought of as biting and weakening reef structures, thereby generating hiding spaces for other organisms and, ultimately, beach sand. In contrast, grazing fish that crop down bushy algae get the limelight for helping reefs maintain healthy coral ...

Hummingbird hawkmoths are small insects that hover in the air like hummingbirds when drinking nectar from flowers. Dr. Anna Stöckl from the Biocentre of the Julius-Maximilians-Universität (JMU) Würzburg in Bavaria, Germany, is studying the visual performance of these insects. Dr. Stöckl and her doctoral student Ronja Bigge now present their latest findings in the journal Current Biology. "To control their flight, hummingbird hawkmoths rely on optic flow in the lower half of their visual field," Ronja Bigge explains. Optic flow is the relative motion that the surrounding image casts on the animals' retinas when they fly. We experience this phenomenon ourselves when travelling by train ...

DETROIT (March, 23, 2021) - Henry Ford physician, John Craig, M.D., is leading an international research effort to improve the multidisciplinary collaboration between otolaryngologists and dental providers around the globe when it comes to diagnosing odontogenic sinusitis (ODS). ODS is an infectious condition of the paranasal sinuses that can occur from either dental infection or dental procedures involving the upper jaw. There are multiple ways that infection can spread from the teeth to sinuses, and in more severe scenarios, to the eye, brain, or rest of the body. It has been shown that the various clinicians ...

Rural America is running short on physicians. This worries health experts who have linked limited access to primary care providers to major gaps in health outcomes for rural communities. Addressing this issue is complicated, but new research from the University of Georgia suggests that understanding geographic trends in medical school applicants could help project where the future physician workforce is likely to practice. Knowing a medical student's hometown is an important piece of the puzzle, said study author Donglan "Stacy" Zhang, because geography is known to predict where many new doctors choose to practice. "More than 60% of doctors choose their practice location in ...

The Bale Mountains in south-central Ethiopia are considered to be one of the most unique centers of endemism, with an extraordinary number of plants and animals that can only be found there. Numerous species are already known from this Afromontane high-elevation plateau, making it a biodiversity hotspot, but ongoing research continues to reveal the presence of so far unknown and undescribed organisms. Zoologists END ...

WASHINGTON--Exposure in the womb to a drug used to prevent miscarriage appears to raise the offspring's cancer risk decades later, especially for colorectal and prostate cancers, researchers have found. They will present the results of their new study Tuesday at ENDO 2021, the Endocrine Society's annual meeting. Some adult children of women who received the drug, hydroxyprogesterone caproate (OHPC or 17-OHPC), during pregnancy in the 1950s and 1960s are now experiencing more than twice the odds of cancer, said the study's lead researcher, Caitlin Murphy, Ph.D., M.P.H., an assistant professor at the University of Texas Southwestern Medical Center in Dallas, Texas. OHPC is a synthetic progestogen hormone that was ...

By comparing the genetic diversity of butterflies in North America, researchers reporting in the journal iScience on March 23 found that the array of different evolutionary distinct groups of butterflies is particularly high in the deserts of Mexico and the southwestern United States. This may be an outcome of actively changing conditions in the Desert Southwest and more generally in the western portion of the continent. "When you think of desert, you don't automatically jump to butterflies, but our results showed that this area is actually a really important hotspot for butterflies, even if it isn't for plants," says co-first author Chandra Earl, who recently received her PhD from the University of Florida. "Just because butterflies are closely tied to their host plants doesn't ...