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Fatal interactions: pneumonia in bighorn lambs following experimental exposure to carriers of .
J Clin Microbiol
January 2025
Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, USA.
We hypothesized that bighorn sheep ewes with chronic nasal carriage are the source of infection that results in fatal lamb pneumonia. We tested this hypothesis in captive bighorn ewes at two study facilities over a 5-year period, by identifying carrier ewes and then comparing lamb fates in groups that did (exposed pens) or did not (non-exposed pens) include one or more carrier ewes. Most (23 of 30) lambs born in exposed pens, but none of 11 lambs born in non-exposed pens, contracted fatal pneumonia.
View Article and Find Full Text PDFNasal microbiota predictors for methicillin resistant Staphylococcus colonization in critically ill children.
PLoS One
January 2025
Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN, United States of America.
Background: Surveillance cultures to identify patients colonized with methicillin-resistant Staphylococcus aureus (MRSA) is recommended at pediatric intensive care unit (PICU) admission but doesn't capture other methicillin-resistant Staphylococcus and is resource intensive. We determined the prevalence and identified nasal microbiome predictors for methicillin-resistant Staphylococcus colonization at the time of PICU admission.
Study Design: A prospective cohort study was performed in a 20-bed pediatric intensive care unit (PICU) between 2020-2021.
Asymptomatic carriage and molecular characterization of Staphylococcus aureus in pre-clinical and clinical medical students.
Folia Microbiol (Praha)
January 2025
Department of Public Health, Faculty of Medicine, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic.
Medical students are exposed to the hospital environment and patients during their studies, increasing the risk of exposure to virulent and antibiotic-resistant isolates of Staphylococcus aureus. The aim of the study is to determine the prevalence of Staphylococcus aureus among medical students who have varying levels of exposure to the hospital environment to provide valuable insights into the risk of colonization and transmission. Nasal swabs and fingerprints were obtained and cultured on a selective medium for staphylococci.
View Article and Find Full Text PDFLongitudinal prevalence and co-carriage of pathogens associated with nursing home acquired pneumonia in three long-term care facilities.
bioRxiv
December 2024
Pathogen and Microbiome Institute, Northern Arizona University, Flagstaff, Arizona, United States of America.
Nursing home acquired pneumonia (NHAP), and its subset - aspiration-associated pneumonia, is a leading cause of morbidity and mortality among residents in long-term care facilities (LTCFs). Understanding colonization dynamics of respiratory pathogens in LTCF residents is essential for effective infection control. This study examines the longitudinal trends in prevalence, persistence, bacterial load, and co-colonization patterns of five respiratory pathogens in three LTCFs in Phoenix, Arizona.
View Article and Find Full Text PDFGastrointestinal (GI) colonization by methicillin-resistant (MRSA) is associated with a high risk of transmission and invasive disease in vulnerable populations. The immune and microbial factors that permit GI colonization remain unknown. Male sex is correlated with enhanced nasal carriage, skin and soft tissue infections, and bacterial sepsis.
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