Peste des petits ruminants virus tissue tropism and pathogenesis in sheep and goats following experimental infection

PLoS One. 2014 Jan 30;9(1):e87145. doi: 10.1371/journal.pone.0087145. eCollection 2014.

Abstract

Peste des petits ruminants (PPR) is a viral disease which primarily affects small ruminants, causing significant economic losses for the livestock industry in developing countries. It is endemic in Saharan and sub-Saharan Africa, the Middle East and the Indian sub-continent. The primary hosts for peste des petits ruminants virus (PPRV) are goats and sheep; however recent models studying the pathology, disease progression and viremia of PPRV have focused primarily on goat models. This study evaluates the tissue tropism and pathogenesis of PPR following experimental infection of sheep and goats using a quantitative time-course study. Upon infection with a virulent strain of PPRV, both sheep and goats developed clinical signs and lesions typical of PPR, although sheep displayed milder clinical disease compared to goats. Tissue tropism of PPRV was evaluated by real-time RT-PCR and immunohistochemistry. Lymph nodes, lymphoid tissue and digestive tract organs were the predominant sites of virus replication. The results presented in this study provide models for the comparative evaluation of PPRV pathogenesis and tissue tropism in both sheep and goats. These models are suitable for the establishment of experimental parameters necessary for the evaluation of vaccines, as well as further studies into PPRV-host interactions.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Disease Progression
  • Goat Diseases / pathology
  • Goat Diseases / virology
  • Goats / virology
  • Peste-des-Petits-Ruminants / pathology*
  • Peste-des-Petits-Ruminants / veterinary
  • Peste-des-Petits-Ruminants / virology*
  • Peste-des-petits-ruminants virus / genetics*
  • Peste-des-petits-ruminants virus / isolation & purification*
  • Sheep / virology
  • Sheep Diseases / pathology
  • Sheep Diseases / virology
  • Tropism / genetics*
  • Virus Replication / genetics

Grants and funding

This work was funded from a Canadian International Food Security Research Fund (CIFSRF) grant (no. 106930: Livestock vaccines against viral diseases for sub-Saharan Africa) by the Canadian International Development Research Centre (IDRC) and Canadian International Development Agency (CIDA) and is supported by the respective research institutions to which the authors belong. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.