Desquesnes Marc, De La Rocque Stéphane, Goureau L..
1999. Seroprevalence of Trypanosoma vivax and other haemoparasites in bovines in French Guyana.
In : Proceedings of first symposium on new world trypanosomes = [Actes du 1er symposium sur les trypanosomes d'Amérique]. Vokaty S. (ed.), Desquesnes M. (ed.)
Autre titre : Serodiagnostic de fréquence de Trypanosoma vivax et autres hémoparasites en Guyane française
Résumé : An epidemiological survey was carded out in bovines, in French Guyana, with parasitological techniques, namely the WOO test and blood smear examinati- on, and 9 serological ELISA tests for antigen and/or antibody detection for several #Trypanosoma# sp., #Babesia# sp., #Anaplasma marginale# and #Theileria mutans# . The serological techniques fumished by ILRl are still under evaluation. Five breeding areas. were determined on the border cost of- the country. 2953 cattle were sampled between 91 and 92, and 4 herds, for a total of 200 heads were regularly sampled for the observation of seasonal variations. Amongst 509 observations of capillary tubes, 7.6% showed trypanosomes identified as Megabypanum species. Since #T. vivax# was not observed, it was concluded that the survey was conducted during a post- epizootic period. A marginale was observed in 28% of the 442 stained blood smears observed, and B, bigemina in 3 samples. The 2953 serum samples tested indicated that #Trypanosoma# sp. antibodies are present in 22% of the cattle, with 12% positives for antigens of #T. vivax#, 20% for #T. brucei# and 18%6 for #T. congolense#. The last two tests were considered as cross reacting with #T. vivax# since nether #T. evansi# nor #T. congolense# are present in French Guyana. There was no seasonal variations, but dairy cattle had higher prevalences than beef cattle, probably due to different management. Seroprevalence of #A. marginale# antigens was of 61%, in agreement with the epidemiological findings, since anaplasmosis is highly endemic in the country. Similarly, high semprevalences were found with #Babesia# sp. tests: 62% for #B. bovis", 22% antigens and 67% antibodies for #B. bigemina#. Antibody detection for meileda mutans were also performed, but were all negative, confidng the fact that this parasite is not present in the country. Re-evaluation of the antigen-ELISA for #Trypanosoma# sp, appeared necessary.
Mots-clés Agrovoc : Trypanosoma vivax, technique immunologique, diagnostic, bovin
Mots-clés géographiques Agrovoc : Guyane française, France
Classification Agris : L72 - Organismes nuisibles des animaux
L73 - Maladies des animaux
Auteurs et affiliations
-
Desquesnes Marc, CIRAD-EMVT-SANTE ANIMALE (BFA)
ORCID: 0000-0002-7665-2422
- De La Rocque Stéphane, CIRAD-EMVT-ECONAP (BFA)
- Goureau L.
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/389733/)
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