Peer-reviewed veterinary case report
Canine parvovirus strains in sick dogs in Lithuania 2014-2015
By Zienius, D et al.·Published in Polish journal of veterinary sciences·2016·View original on PubMed →
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Original publication title: Phylogenetic characterization of Canine Parvovirus VP2 partial sequences from symptomatic dogs samples.
- Species:
- dog
Plain-English summary
A group of dogs in Lithuania showed symptoms of canine parvovirus (CPV), which can cause severe gastrointestinal issues. Researchers tested fecal samples from these sick dogs and found that many were infected with a variant of CPV known as CPV-2a, even though some had been vaccinated against the virus. The study revealed that the virus strains circulating in the area were genetically different from the vaccine strains, suggesting that the vaccine may not fully protect against these local variants. Understanding these differences can help veterinarians improve vaccination strategies and better protect dogs from CPV.
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Abstract
The aim of the present study was to detect canine parvovirus (CPV) from faecal samples of clinically ill domestic dogs by polymerase chain reaction (PCR) followed by VP2 gene partial sequencing and molecular characterization of circulating strains in Lithuania. Eleven clinically and antigen-tested positive dog faecal samples, collected during the period of 2014-2015, were investigated by using PCR. The phylogenetic investigations indicated that the Lithuanian CPV VP2 partial sequences (3025-3706 cds) were closely related and showed 99.0-99.9% identity. All Lithuanian sequences were associated with one phylogroup, but grouped in different clusters. Ten of investigated Lithuanian CPV VP2 sequences were closely associated with CPV 2a antigenic variant (99.4% nt identity). Five CPV VP2 sequences from Lithuania were related to CPV-2a, but were rather divergent (6.8 nt differences). Only one CPV VP2 sequence from Lithuania was associated (99.3% nt identity) with CPV-2b VP2 sequences from France, Italy, USA and Korea. The four of eleven investigated Lithuanian dogs with CPV infection symptoms were vaccinated with CPV-2 vaccine, but their VP2 sequences were phylogenetically distantly associated with CPV vaccine strains VP2 sequences (11.5-15.8 nt differences). Ten Lithuanian CPV VP2 sequences had monophyletic relations among the close geographically associated samples, but five of them were rather divergent (1.0% less sequence similarity). The one Lithuanian CPV VP2 sequence was closely related with CPV-2b antigenic variant. All the Lithuanian CPV VP2 partial sequences were conservative and phylogenetically low associated with most commonly used CPV vaccine strains.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/27096803/