Identification of a Tsal1 52–75 salivary synthetic peptide to monitor cattle exposure to tsetse flies

Somda Martin Bienvenu, Cornelie Sylvie, Bengaly Zakaria, Mathieu-Daudé Françoise, Poinsignon Anne, Dama Emilie, Bouyer Jérémy, Sidibé Issa, Demettre Edith, Seveno Martial, Remoue Franck, Sanon Antoine, Bucheton Bruno. 2016. Identification of a Tsal1 52–75 salivary synthetic peptide to monitor cattle exposure to tsetse flies. Parasites and Vectors, 9 (149), 12 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Quartile : Q1, Sujet : PARASITOLOGY

Abstract : Background: The saliva of tsetse flies contains a cocktail of bioactive molecules inducing specific antibody responses in hosts exposed to bites. We have previously shown that an indirect-ELISA test using whole salivary extracts from Glossina morsitans submorsitans was able to discriminate between(i) cattle from tsetse infested and tsetse free areas and (ii) animals experimentally exposed to low or high numbers of tsetse flies. In the present study, our aim was to identify specific salivary synthetic peptides that could be used to develop simple immunoassays to measure cattle exposure to tsetse flies. Methods: In a first step, 2D-electrophoresis immunoblotting, using sera from animals exposed to a variety of bloodsucking arthropods, was performed to identify specific salivary proteins recognised in cattle exposed to tsetse bites. Linear epitope prediction software and Blast analysis were then used to design synthetic peptides within the identified salivary proteins. Finally, candidate peptides were tested by indirect-ELISA on serum samples from tsetse infested and tsetse free areas, and from exposure experiments. Results: The combined immunoblotting and bioinformatics analyses led to the identification of five peptides carrying putative linear epitopes within two salivary proteins: the tsetse salivary gland protein 1 (Tsal1) and the Salivary Secreted Adenosine (SSA). Of these, two were synthesised and tested further based on the absence of sequence homology with other arthropods or pathogen species. IgG responses to the Tsal1 52-75 synthetic peptide were shown to be specific of tsetse exposure in both naturally and experimentally exposed hosts. Nevertheless, anti-Tsal1 52-75 IgG responses were absent in animals exposed to high tsetse biting rates. Conclusions: These results suggest that Tsal1 52-75 specific antibodies represent a biomarker of low cattle exposure to tsetse fly. These results are discussed in the light of the other available tsetse saliva based-immunoassays and in the perspective of developing a simple serological tool for tsetse eradication campaigns to assess the tsetse free status or to detect tsetse reemergence in previously cleared areas. (Résumé d'auteur)

Mots-clés Agrovoc : Glossina, Bovin, Salive, Peptide, Identification, Test biologique, Technique immunologique, Test ELISA, Surveillance épidémiologique, Indicateur biologique, Immunologie, Trypanosoma, Amblyomma variegatum, Glossina morsitans, Tabanidae, Stomoxys, Anopheles gambiae, Bétail, Anticorps

Mots-clés géographiques Agrovoc : Afrique, Burkina Faso

Mots-clés complémentaires : Glossina morsitans submorsitans, Glossina palpalis gambiensis

Mots-clés libres : Peptide salivaire, Marqueur d'exposition, Glossines, Bovins

Classification Agris : L73 - Animal diseases
L72 - Pests of animals
U30 - Research methods

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

  • Somda Martin Bienvenu, CIRDES (BFA)
  • Cornelie Sylvie, IRD (FRA)
  • Bengaly Zakaria, CIRDES (BFA)
  • Mathieu-Daudé Françoise, IRD (FRA)
  • Poinsignon Anne, IRD (FRA)
  • Dama Emilie, CIRDES (BFA)
  • Bouyer Jérémy, CIRAD-BIOS-UMR CMAEE (ETH) ORCID: 0000-0002-1913-416X
  • Sidibé Issa, CIRDES (BFA)
  • Demettre Edith, Institut de génomique fonctionnelle (FRA)
  • Seveno Martial, Institut de génomique fonctionnelle (FRA)
  • Remoue Franck, IRD (FRA)
  • Sanon Antoine, Université de Ouagadougou (BFA)
  • Bucheton Bruno, IRD (FRA)

Source : Cirad-Agritrop (

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