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Experimental infection of wild boars (Sus scrofa) with Rickettsia rickettsii and evaluation of the transmission potential to Amblyomma sculptum ticks.
Parasit Vectors
January 2025
Veterinary and Animal Science School, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil.
Background: Brazilian spotted fever is a tick-borne disease caused by the bacterium Rickettsia rickettsii, whose main vector in Brazil is the tick Amblyomma sculptum. Amplifying hosts are essential for the perpetuation of this bacterium in the tick population as they can be sources of infection during bacteremic periods. Recent studies demonstrated the ability of suids (Sus scrofa) to sustain populations of A.
View Article and Find Full Text PDFA triad of somatic mutagenesis converges in self-reactive B cells to cause a virus-induced autoimmune disease.
Immunity
January 2025
Garvan Institute of Medical Research, Darlinghurst, NSW, Australia; St Vincent's Clinical School, UNSW Sydney, Sydney, NSW, Australia. Electronic address:
The unexplained association between infection and autoimmune disease is strongest for hepatitis C virus-induced cryoglobulinemic vasculitis (HCV-cryovas). To analyze its origins, we traced the evolution of pathogenic rheumatoid factor (RF) autoantibodies in four HCV-cryovas patients by deep single-cell multi-omic analysis, revealing three sources of B cell somatic mutation converged to drive the accumulation of a large disease-causing clone. A method for quantifying low-affinity binding revealed recurring antibody variable domain combinations created by V(D)J recombination that bound self-immunoglobulin G (IgG) but not viral E2 antigen.
View Article and Find Full Text PDFSeroprevalence of and Associated Risk Factors for Bovine Viral Diarrhea in Dairy Cattle in and Around Nekemte Town, East Wallaga, Oromiya Regional State, Ethiopia.
Biomed Res Int
January 2025
College of Agriculture and Veterinary Medicine, Jimma University, Jimma, Ethiopia.
Bovine viral diarrhea virus (BVDV) is an important pathogen affecting dairy cattle all over the world by causing significant economic losses due to reproductive and respiratory problems, immunosuppressive effects, increased risk of morbidity, and calf mortality. A cross-sectional study was conducted from February 2021 to August 2021 to determine the seroprevalence of bovine viral diarrhea (BVD) and identify risk factors associated with its occurrence in and around Nekemte Town of Ethiopia. Blood samples were collected from 305 dairy cattle of 41 herds by using cluster-sampling method.
View Article and Find Full Text PDFDisseminated enterovirus infection treated with intravenous immunoglobulin in a patient on maintenance ocrelizumab for multiple sclerosis.
BMJ Case Rep
January 2025
Infectious Diseases, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia.
We present a case of a woman in her 40s with disseminated enterovirus infection in the setting of maintenance therapy with ocrelizumab for relapsing-remitting multiple sclerosis. The patient originally presented with fever, bilateral lower limb swelling and hypoalbuminaemia. She subsequently developed a productive cough and diarrhoea, and a viral respiratory multiplex panel detected rhino/enterovirus.
View Article and Find Full Text PDFCausal Relationship Between Antibody-Mediated Immune Responses of Chlamydia trachomatis Infection and Reproductive Tract Complications: A Bidirectional Mendelian Randomization Study.
Am J Reprod Immunol
January 2025
The First School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang, China.
Purpose: Characterized as a prevalent sexually transmitted infection, Chlamydia trachomatis is intimately associated with reproductive tract complications, including pelvic inflammatory disease (PID) and infertility. However, the causal relationships between C. trachomatis infection and reproductive tract complications remain elusive.
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