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Detection of Rocahepevirus ratti in Bivalve Mollusks from São Luís Island, Maranhão, Brazil: A Potential Transmission Route of an Emerging Zoonotic Pathogen?
Food Environ Virol
January 2025
Laboratory of Comparative and Environmental Virology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil.
The attempt to investigate hepatitis E virus (HEV) contamination in naturally growing mangrove bivalve mollusks captured for local sale in a touristic area of Maranhão state in Brazil revealed the detection of rat hepatitis E virus (ratHEV). Using international standard protocols for processing and nucleic acid extraction, we analyzed 89 bivalve samples (Mytella falcata and Crassostrea rhizophorae) with two broadly reactive assays: heminested pan-Hepeviridae (ORF-1) and probe-based HEV-1 to HEV-4 (ORF-2/ORF-3). Heminested reactions presented 2 (2.
View Article and Find Full Text PDFIsolation of the feline herpesvirus-1 modified live vaccine strain F2 from one of four cats with dendritic ulcers.
J Feline Med Surg
January 2025
Environmental Science for Sustainable Development, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
Objectives: To investigate the pathogenicity of feline herpesvirus-1 (FHV-1) to the cornea, FHV-1 strains isolated from feline eyes with dendritic ulcers were subjected to genomic analysis to determine whether FHV-1 vaccine strains are involved in the formation of dendritic ulcers.
Methods: All open reading frame (ORF) sequences of the three F2 strains (Virbac, Intervet and Merial) and the FHV-1 clinical isolates from cats registered in GenBank were compared to detect nucleotide variants unique to the F2 strains, with those nucleotides then being used for simple genotyping of the F2 strains. In all isolates from feline eyes with dendritic ulcers, the regions including nucleotide variants of the F2 strain were amplified with PCR and sequenced.
Orf virus nodule.
Actas Dermosifiliogr
December 2024
Servicio de Dermatología, Hospital General Universitario de Albacete, Albacete, España.
Natural selection shapes codon usage and host adaptation of NS1 in mosquito-borne pathogenic flaviviruses.
Int J Biol Macromol
December 2024
National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China. Electronic address:
The NS1 protein of nine mosquito-borne flaviviruses, including Dengue virus 1-4, Japanese encephalitis virus, West Nile virus, Yellow fever virus, Tembusu virus, and Zika virus, shows distinct codon usage and evolutionary traits. Codon usage analysis shows notable base composition bias and non-conservatism in NS1, with distinct evolutionary traits from its ORF. Analysis of relative synonymous codon usage (RSCU) indicates that the NS1 genes exhibit non-conservative RSCU patterns within different mosquito-borne pathogenic flaviviruses.
View Article and Find Full Text PDFGenomic Differences and Mutations in Epidemic Orf Virus and Vaccine Strains: Implications for Improving Orf Virus Vaccines.
Vet Sci
December 2024
Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, College of Animal Science and Technology, Foshan University, Foshan 528225, China.
Orf (ORF) is an acute disease caused by the Orf virus (ORFV), and poses a certain threat to animal and human health. Live attenuated vaccines play an important role in the prevention and control of ORF. The effectiveness of the live attenuated Orf virus vaccine is influenced by several factors, including the genomic match between the vaccine strain and circulating epidemic strains.
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