Abstract
Pseudorabies virus (PRV) is a common pathogen in multiple animal species particularly in pigs. However, PRV infection in humans is rare and to the best of knowledge, PRV has never been isolated from human cases before. Four acute encephalitis cases in humans were confirmed as PRV infection based on clinical symptoms, laboratory diagnosis, and metagenomic next-generation sequencing (mNGS). Cerebrospinal fluid (CSF) samples were collected and applied for virus isolation. Etiological and genetic characteristics of this PRV human isolate were further determined. The patients manifested respiratory dysfunction and acute neurological symptoms. The mNGS revealed PRV specific nucleotide sequences in patients' CSF samples (7-6198 reads and 0.2446%-80.58% coverage). The PRV envelope glycoprotein B antibody, glycoprotein E antibody, and neutralizing antibody were positively detected. For the first time, a PRV strain, designated hSD-1/2019, was isolated and identified from one CSF sample, and transmission electron microscopy revealed hSD-1/2019 had typical morphology similar to swine PRV. Phylogenetic analysis illustrated that hSD-1/2019 was genetically closest to those PRV variant strains currently circulating in pigs in China, and this s...Continue Reading
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