Resurgence of rabies in Hungary during 2013-2014: An attempt to track the origin of identified strains

Transboundary and Emerging Diseases
Ákos HornyákKrisztián Bányai

Abstract

In 2013-2014, accumulation of rabies episodes raised concerns regarding ongoing elimination programme in Hungary. Nearly four dozen cases were identified over a 13-month period in the central region of the country far behind the immunization zones. Although the outbreak was successfully controlled, the origin of disease remained unknown. In this study, we sequenced the partial N and G genes from 47 Hungarian rabies virus (RV) strains isolated from the 2013-2014 outbreak. Sequencing and phylogenetic analysis of the N and G genes showed that the Hungarian RV isolates share high nucleotide similarity among each other (up to 100%). When analysing the N gene, comparable sequence similarity was seen between the outbreak strains and some historic Romanian RV strains. Unfortunately, in the lack of available sequence data from the Romanian RV strains, the genetic relationship within the G gene could not be determined. Phylogenetic analysis of Hungarian RV isolates detected in the past revealed that multiple independent RV lineages circulated in our country over the past 25 years. The parental strain of the 2013-2014 outbreak may have been imported independently perhaps from east through transborder movement of a reservoir animal. Next t...Continue Reading

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