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Coagulation abnormalities following brown recluse spider (Loxosceles reclusa) envenomation: A description of 2 cases and review of the literature.
Am J Clin Pathol
January 2025
Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, US.
Objective: Hemostatic abnormalities, including disseminated intravascular coagulation (DIC), are often cited as a common finding in patients following Loxosceles spider envenomation (ie, loxoscelism). The prevalence and severity of coagulopathy, however, particularly following L reclusa (ie, brown recluse) envenomation, is not well described. This study aimed to characterize coagulation laboratory parameters and coagulopathy in patients following L reclusa envenomation.
View Article and Find Full Text PDFComparison of transcriptomic profiles between intracellular and extracellular Bartonella henselae.
Commun Biol
January 2025
Division of Immunology, Tulane National Primate Research Center, Tulane University, Covington, LA, USA.
The Bartonella genus of bacteria encompasses ubiquitous species, some of which are pathogenic in humans and animals. Bartonella henselae, the causative agent of Cat Scratch disease, is responsible for a large portion of human Bartonella infections. These bacteria can grow outside of cells, replicate in erythrocytes and invade endothelial and monocytic cells.
View Article and Find Full Text PDFNiche-derived Semaphorin 4A safeguards functional identity of myeloid-biased hematopoietic stem cells.
Nat Aging
January 2025
Translational Science and Therapeutics Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.
Somatic stem cell pools comprise diverse, highly specialized subsets whose individual contribution is critical for the overall regenerative function. In the bone marrow, myeloid-biased hematopoietic stem cells (myHSCs) are indispensable for replenishment of myeloid cells and platelets during inflammatory response but, at the same time, become irreversibly damaged during inflammation and aging. Here we identify an extrinsic factor, semaphorin 4A (Sema4A), which non-cell-autonomously confers myHSC resilience to inflammatory stress.
View Article and Find Full Text PDFStrength and durability of indirect protection against SARS-CoV-2 infection through vaccine and infection-acquired immunity.
Nat Commun
January 2025
Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University, Stanford, USA.
Early investigation revealed a reduced risk of SARS-CoV-2 infection among social contacts of COVID-19 vaccinated individuals, referred to as indirect protection. However, indirect protection from SARS-CoV-2 infection-acquired immunity and its comparative strength and durability to vaccine-derived indirect protection in the current epidemiologic context of high levels of vaccination, prior infection, and novel variants are not well characterized. Here, we show that both vaccine-derived and infection-acquired immunity independently yield indirect protection to close social contacts with key differences in their strength and waning.
View Article and Find Full Text PDFscRNA seq of an F1 cross of Marek's disease resistant and susceptible chickens identifies allele specific expression signatures enriched in transcription modulators.
Sci Rep
January 2025
USDA, Agricultural Research Service, US National Poultry Research Center, 934 College Station Road, Athens, GA, 30605, USA.
Marek's disease (MD), a T cell lymphoma disease in chickens, is caused by the Marek's disease virus (MDV) found ubiquitously in the poultry industry. Genetically resistant Line 6 (L6) and susceptible Line 7 (L7) chickens have been instrumental to research on avian immune system response to MDV infection. In this study we characterized molecular signatures unique to splenic immune cell types across different genetic backgrounds 6 days after infection.
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