Author Interviews, CDC, Infections / 20.05.2024

MedicalResearch.com Interview with: Cathryn Haigh, Ph.D. Chief Prion Cell Biology Unit Laboratory of Neurological Infections and Immunity National Institute of Allergy and Infectious Diseases Division of Intramural Research, Rocky Mountain Laboratories National Institutes of Health Hamilton, MT 59840 MedicalResearch.com: What is the background for this study,  ie what are prions/prion-related diseases?  Where are prions found? Response: Prion diseases are infectious neurodegenerative diseases of humans and animals.  In humans these diseases often manifest as rapidly progressing dementias but are rarely caused by a known exposure to the infectious agents (prions).  More commonly they are sporadic (no known cause) or hereditary. One form of human disease is believed to have arisen from eating beef contaminated with bovine spongiform encephalopathy (as known as mad cow disease).  This has resulted in concerns that chronic wasting disease (CWD), a prion disease affecting deer, elk and moose, might also have the potential to cross the species barrier and cause disease in humans.  To date, transmissions of CWD prions to cynomolgus macaques have been negative, a good sign that crossing the species barrier would not be easy, but macaques are not human so we wanted to test whether CWD could infect human brain tissue. To do this we used a human cerebral organoid model (mini human brain tissues grown from skin cells in a laboratory) and directly exposed the organoids to prions from the brains of animals that had died of CWD. (more…)
Author Interviews, COVID -19 Coronavirus, Environmental Risks / 27.07.2023

MedicalResearch.com Interview with:
Dr. Thomas Deliberto, PhD, DVM, APHIS Wildlife Services One Health Coordinator
  Dr. Thomas Deliberto, PhD, DVM, APHIS Wildlife Services One Health Coordinator     MedicalResearch.com: What is the background for this study? deer-covidResponse: In 2021, USDA launched a pilot study to investigate exposure of wild white-tailed deer (Odocoileus virginianus) to SARS-CoV-2, a zoonotic virus and the virus that causes COVID-19. Researchers found that 40% of the blood samples tested had SARS-CoV-2 antibodies. This initial study suggested that SARS-CoV-2 could be transmitted from humans to deer, and that deer could potentially serve as a reservoir for the virus. To better understand the transmission of SARS-CoV-2 in white-tailed deer, a team of researchers conducted a larger study to collect and analyze respiratory samples from free-ranging white-tailed deer in the United States.  The study identified SARS-CoV-2 sequences in white-tailed deer across nearly half of the states in the U.S. The researchers also found that deer could be infected with multiple SARS-CoV-2 lineages, and that these lineages could be transmitted from deer to deer. In addition, the researchers found three cases of potential virus transmission from white-tailed deer back to humans.  This raises concerns about the potential for the virus to continue to evolve in an animal reservoir, and the possibility of future spillover events. (more…)