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Development and application of an antibody-ELISA to follow up a Trypanosoma evansi outbreak in a dromedary camel herd in France

Desquesnes Marc, Bossard Géraldine, Thevenon Sophie, Patrel Delphine, Ravel Sophie, Pavlovic Djamila, Herder Stéphane, Patout Olivier, Lepetitcolin Elizabeth, Hollzmuller Philippe, Berthier David, Jacquiet Philippe, Cuny Gérard. 2009. Development and application of an antibody-ELISA to follow up a Trypanosoma evansi outbreak in a dromedary camel herd in France. Veterinary Parasitology, 162 (3-4) : pp. 214-220.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : VETERINARY SCIENCES / Quartile : Q2, Sujet : PARASITOLOGY

Additional Information : Erratum paru dans Veterinary parasitology (2009) 165 (1-2) p. 185 http://dx.doi.org/10.1016/j.vetpar.2009.03.058

Abstract : Erratum paru dans Veterinary parasitology (2009) 165 (1-2) p. 185 http://dx.doi.org/10.1016/j.vetpar.2009.03.058. An outbreak of trypanosomosis was observed for the first time in metropolitan France in October 2006, when five camels were proved to be infected by Trypanosoma evansi using parasitological methods. The parasite was isolated and used to produce a soluble antigen for antibody-enzyme linked immunosorbent assay (ELISA) in a protocol derived from a method previously developed for sheep and humans but using protein A conjugate. The animals were treated on three instances, alternatively with melarsomine hydrochloride and quinapyramine and followed up on a monthly basis for 2 years with various diagnostic techniques including parasitological, serological and DNA-based methods. Initially, five animals were detected as being positive using ELISA with 83.3% concordance to parasitological tests. Immediately after the first treatment, parasites and DNA disappeared in all animals; antibody levels decreased regularly until ELISA became negative 3-4 months later. Ten months after the first treatment, parasites and antibodies were detected again in one of the camels previously found to be infected. A retrospective study indicated that the weight of this animal had been underestimated; consequently, it had received underdosages of both trypanocides. However, since hypotheses of re-infection or relapse could not be fully substantiated, it is not known whether the ELISA results for this animal were true- or false-negative over a 7-month period. The study confirmed the value of this ELISA using protein A conjugate to detect antibodies directed against T. evansi in camels and the need to use several diagnostic techniques to optimize detection of infected animals. A warning is raised on surra, a potentially emerging disease in Europe. (Résumé d'auteur)

Mots-clés Agrovoc : Trypanosoma evansi, Dromadaire

Mots-clés géographiques Agrovoc : Canaries (îles), Midi-Pyrénées

Classification Agris : L73 - Animal diseases

Champ stratégique Cirad : Axe 4 (2005-2013) - Santé animale et maladies émergentes

Auteurs et affiliations

  • Desquesnes Marc, CIRAD-BIOS-UMR TRYPANOSOMES (THA) ORCID: 0000-0002-7665-2422
  • Bossard Géraldine, CIRAD-BIOS-UMR TRYPANOSOMES (FRA)
  • Thevenon Sophie, CIRAD-BIOS-UMR TRYPANOSOMES (FRA)
  • Patrel Delphine, IRD (FRA)
  • Ravel Sophie, IRD (FRA)
  • Pavlovic Djamila, CIRAD-EMVT-UMR TRYPANOSOMES (FRA)
  • Herder Stéphane, IRD (FRA)
  • Patout Olivier, AVEM (FRA)
  • Lepetitcolin Elizabeth, AVEM (FRA)
  • Hollzmuller Philippe
  • Berthier David, CIRAD-BIOS-UMR TRYPANOSOMES (FRA) ORCID: 0000-0002-3283-6588
  • Jacquiet Philippe, ENVT (FRA)
  • Cuny Gérard, IRD (FRA)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/549407/)

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