First report of surra (Trypanosoma evansi infection) in a Tunisian dog Mohamed Ridha Rjeibi, Taoufik Ben Hamida, Zara Dalgatova, Tarek Mahjoub, Ahmed Rejeb, Walid Dridi and Mohamed Gharbi Parasite, 22 (2015) 3 Published online: 06 February 2015 DOI: 10.1051/parasite/2015004