Development of a PPRV challenge model in goats and its use to assess the efficacy of a PPR vaccine

Enchéry François, Hamers Claude, Kwiatek Olivier, Gaillardet Daniel, Montange Camille, Brunel Hervé, Goutebroze Sylvain, Philippe-Reversat Corinne, Libeau Geneviève, Hudelet Pascal, Bataille Arnaud. 2019. Development of a PPRV challenge model in goats and its use to assess the efficacy of a PPR vaccine. Vaccine, 37 (12) : 1667-1673.

https://doi.org/10.1016/j.vaccine.2019.01.057

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Q2, Sujet : MEDICINE, RESEARCH & EXPERIMENTAL / Quartile : Q3, Sujet : IMMUNOLOGY

Résumé : Peste des Petits Ruminants (PPR) is a severe disease of small ruminants and has high economic impacts in developing countries. Endemic in Africa, the Middle East and Asia, the disease is currently progressing with occurrences reported in North Africa, Turkey and in Georgia, and now threatens Europe. Much remains unknown about the infection dynamics, the virulence of the different strains and species/breed susceptibility. Robust experimental challenge models are needed to explore these fields and to confirm the efficacy of currently sold vaccines. We first assessed virulence of two PPR virus strains (CI89 and MA08) in Saanen goats. Whereas the MA08 strain led to classical severe clinical signs of PPR, the CI89 strain appeared to cause a mild disease in Saanen goats, highlighting the difference in virulence between strains in this animal model. We further demonstrated the importance of the inoculation route in the appearance of clinical signs and that ocular excretion is a better choice than blood for viral detection. After developing a robust challenge model, we assessed the efficacy of a vaccine (PPR-VAC®, BVI Botswana) against the MA08 strain and demonstrated that this vaccine blocked viral excretion and significantly reduced clinical signs. These results reinforce the paradigm that a strain from one lineage could protect against strains from other lineages.

Mots-clés Agrovoc : chèvre, peste des petits ruminants, vaccin

Mots-clés géographiques Agrovoc : Botswana

Classification Agris : L73 - Maladies des animaux

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

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