ABSTRACT
Reports of dogs with H3N2 canine influenza virus (CIV) have been documented frequently. To better understand the seroprevalence of H3N2 CIV among dogs in northeast China, here we report for the first time a relatively high seroprevalence of H3N2 CIV infection in dogs in northeast China. Forty-five of the 223 canine sera (20.2%) and 166 of the 500 canine sera (33.2%) tested feral dogs and pet dogs were seropositive by NP-ELISA, which is higher than that in southern China. The relative data provided in this report can be useful for small animal practitioners or public health policy makers to carry out relative measures for the prevention of this disease. Meanwhile, similar seroprevalence studies and prospective natural history and incidence studies should also be undertaken in other places.
Subject(s)
Dog Diseases/epidemiology , Dog Diseases/immunology , Dog Diseases/virology , Influenza A Virus, H3N2 Subtype/immunology , Orthomyxoviridae Infections/veterinary , Animals , Antibodies, Viral/blood , China , Dogs , Enzyme-Linked Immunosorbent Assay/veterinary , Orthomyxoviridae Infections/epidemiology , Orthomyxoviridae Infections/immunology , Seroepidemiologic StudiesABSTRACT
We report here the complete genomic sequence of a novel porcine circovirus type 2 (PCV2) strain, which is supposed to be the result of natural genetic recombination between the ORF1 gene of genotype PCV2b-1B and the ORF2 gene of PCV2b-1C. Further analyses revealed that this novel PCV2 strain arose from recombination between PCV2a and PCV2b strains within the ORF2 gene. To our knowledge, this is the first report of both inter- and intragenotype PCV2 gene rearrangement in the field, and it will help in understanding the epidemiology and molecular characteristics of porcine circovirus type 2(PCV2) in southern China.
Subject(s)
Circovirus/genetics , Genome, Viral , Animals , Capsid/chemistry , China , Circoviridae Infections/virology , Genomics , Genotype , Molecular Sequence Data , Open Reading Frames , Sequence Analysis, DNA , SwineABSTRACT
We report here the complete genomic sequence of a novel duck hepatitis A virus (DHAV) isolated from mixed infections with DHAV type 1 (DHAV-1) and DHAV-3 in ducklings in Southern China. The whole nucleotide sequence had the highest homology with the sequence of DHAV-3 (GenBank accession number DQ812093) (96.2%). To our knowledge, this is the first report of gene rearrangement between DHAV-1 and DHAV-3, and it will help to understand the epidemiology and molecular characteristics of duck hepatitis A virus in Southern China.
