Soulasack VANNAMAHAXAY, Phongsakorn CHUAMMITRI

Update on Canine Parvovirus: Molecular and Genomic Aspects, with Emphasis on Genetic Variants Affecting the Canine Host

Köpeklerde hemorajik enteritin etiyolojik etkeni olan Canine parvovirus (CPV) neredeyse 40 yıl önce ilk olarak CPV tip 2 (CPV-2) olarak izole edildi ve hemen sonrasında ortaya çıkan yeni varyant tipler CPV tip 2'nin yerine geçti. VP2 geni tarafından kodlanan major viral kapsid proteinler aynı zamanda en sıklıkla amino asitlerin başka amino asitlerle değiştiği alanlar olup bu tip DNA virusların aykırı doğasının da sebebini oluşturmaktadır. Spesifik yapılardaki değişimler farklı antijenik varyantların oluşmasına katkıda bulunarak bu virüsün bağlanma ve virusa karşı konakçı bağışıklığının değişmesini etkilemiştir. VP2 geninin sekans analizi ve takibinde karakterizasyonu, 426. amino asitte mutasyon ile şekillenen CPV2a, CPV-2b ve CPV-2c olmak üzere dolaşımda 3 farklı CPV-2 suşunun olduğunu göstermiştir. CPV-2c köpeklerde artmış patojenite ve daha geniş konakçı yelpazesi göstermektedir. Bu derlemede güncel epidemiyolojik çalışmalar ile CPV saha çalışmaları hakkındaki bilgilerin güncellenmesi amaçlanmıştır. Ayrıca, klinik örneklerde CPV'nin tanısında kullanılmak suretiyle sağlık taramasında faydalı olabilecek ve mevcut aşılarla CPV'nin kontrol altına alınmasında faydalı olabilecek bazı hassas ve hızlı tanı yöntemleri değerlendirilmiştir

Köpek Parvovirusu Üzerine Bir Güncelleme: Köpek Konakçıya Etki Eden Genetik Varyasyonların Moleküler ve Genomik Özellikleri

Canine parvovirus (CPV), the etiology of hemorrhagic enteritis in dogs, was first isolated as CPV type 2 (CPV-2) almost 40 years ago, and was soon replaced by the emergence of new variant types. The major viral capsid proteins encoded by the VP2 gene are the sites where amino acids are often substituted, accounting for the unusual nature of this type of DNA virus. The alteration of specific residues has contributed to different antigenic variants which have affected the evolution of virus binding and host immunity to this virus. Sequence analysis of the VP2 gene and subsequent characterization have revealed three circulating CPV-2 strains, CPV-2a, CPV-2b, and CPV-2c, identified by mutations at amino acid residue 426. The latter strain displays increased pathogenicity in dogs and an extended host range. The present review article aimed at updating contemporary information on epidemiological studies and surveys from CPV field work. Moreover, we pointed out some sensitive and rapid diagnostic tools for detecting CPV in clinical samples, techniques which will be useful for health monitoring and management of CPV with currently available vaccines

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