Detection and sequence analysis of equine gammaherpesviruses from horses with respiratory tract disease in Turkey

Transbound Emerg Dis. 2010 Aug 1;57(4):271-6. doi: 10.1111/j.1865-1682.2010.01146.x. Epub 2010 Jun 11.

Abstract

The equid herpesvirus 2 (EHV-2) and 5 (EHV-5), identified agents of respiratory infections and keratoconjunctivitis cases in some equids, comprise a high degree of antigenic heterogeneity. Prevalence and genetic characterization of EHV-2 and EHV-5 strains from Turkey were investigated in this study. A total of 73 nasal swabs and 54 blood specimens were sampled from horses with respiratory tract diseases characterized by mucopurulent nasal discharge and occasional coughing. Overall, EHV-2- and EHV-5-specific DNA amplicons were obtained from 19.2% (14/73) and 21.9% (16/73) of horses tested by multiplex nested PCR. Sequences of EHV-2 and EHV-5 glycoprotein B (gB) gene were used in a phylogenetic analysis that included six EHV-2 and three EHV-5 isolates, which showed that the Turkish EHV-2 and EHV-5 strains have marked sequence divergence from European strains and from each other. Turkish EHV-2 isolates were divided into two distinct subdivisions, and a few isolates were located on a separate branch. This study provides the first epidemiological and phylogenetical report about EHV-2 and EHV-5 infections in Turkey.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Line
  • Herpesviridae Infections / epidemiology
  • Herpesviridae Infections / veterinary*
  • Herpesviridae Infections / virology
  • Horse Diseases / epidemiology
  • Horse Diseases / virology*
  • Horses
  • Phylogeny
  • Phylogeography
  • Polymerase Chain Reaction / veterinary
  • Rabbits
  • Respiratory Tract Infections / epidemiology
  • Respiratory Tract Infections / veterinary*
  • Respiratory Tract Infections / virology
  • Rhadinovirus / genetics*
  • Rhadinovirus / isolation & purification
  • Turkey / epidemiology