Seroprevalence and risk factors for Trypanosoma evansi, the causative agent of surra, in the dromedary camel (Camelus dromedarius) population in Southeastern Algeria
2020
Benaissa, Mohammed Hocine | Mimoune, Nora | Bentria, Younes | Kernif, Tahar | Boukhelkhal, Abdelaziz | Youngs, Curtis | Kaidi, Rachid | Faye, Bernard | Halis, Youcef | Center for Scientific and Technical Research on Arid Regions (CRSTRA) | Université de Bab Ezzouar | Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE) ; Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR48 ; Institut des sciences biologiques - CNRS Biologie (INSB-CNRS)-Institut des sciences biologiques - CNRS Biologie (INSB-CNRS)-Centre National de la Recherche Scientifique (CNRS) | Iowa State University (ISU) | Universidade Luterana do Brasil (ULBRA) | Systèmes d'élevage méditerranéens et tropicaux (UMR SELMET) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | General Directorate of Scientific Research and Technological Development (DGRSDT) | Scientific and Technical Research Center for Arid Areas (CRSTRA)
International audience
Show more [+] Less [-]English. Surra, caused by Trypanosoma evansi, is a re-emerging animal trypanosomosis, which is of special concern for camel-rearing regions of Africa and Asia. Surra decreases milk yield, lessens animal body condition score and reduces market value of exported animals resulting in substantial economic losses. A cross-sectional seroprevalence study of dromedary camels was conducted in Algeria, and major risk factors associated with infection were identified by collecting data on animal characteristics and herd management practices. The seroprevalence of T. evansi infection was determined in sera of 865 camels from 82 herds located in eastern Algeria using an antibody test (card agglutination test for Trypanosomiasis - CATT/T. evansi). Individual and herd seroprevalence were 49.5% and 73.2%, respectively, indicating substantial exposure of camels to T. evansi in the four districts studied. Five significant risk factors for T. evansi hemoparasite infection were identified: geographical area, herd size, husbandry system, accessibility to natural water sources and type of watering. There was no association between breed, sex or age with T. evansi infection. Results of this study provide baseline information that will be useful for launching control programmes in the region and potentially elsewhere.
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