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-Canine leishmaniasis (canL) is widespread in the north of Morocco and the Leishmania infantum local strains are highly virulent. An epidemiological survey was carried out in 1993-1995 in the Khemisset province. In this region, the severity of the disease was assessed during regular visits to the identified foci by clinical examination of 323 dogs. Clinical signs were protean and occurred in various combinations. Biopsies were made on available sick dogs; the main histological changes were severe infiltration of the spleen, lymph nodes and bone marrow by mononuclear cells and hyperplasia of macrophage cells with amastigotes in their cytoplasm. The seroprevalence among 323 dog sera tested by ELISA showed a rate of 16.71%. The highest prevalence of the disease was 23.6% in the Sid El Ghandour hamlet. A comparison of the results of this study with those from the year following the first examination on the same site (Sid El Ghandour) of 67 dogs showed that the disease prevalence had not increased significantly (23.6% to 25.33%). dog / Leishmania infantum / histopathology / seroprevalence / MoroccoRésumé -La leishmaniose canine : étude sérologique, clinique et histopathologique dans la province de Khemisset, Maroc. La leishmaniose canine (L.can) est largement répandue dans la partie Nord du Maroc et les souches de Leishmania infantum sont très virulentes. Dans la présente étude, nous rapportons les résultats d'une enquête sur la leishmaniose canine au Maroc dans la province de Khemisset de 1993 à 1995. La gravité de la maladie a été évaluée par l'examen clinique minutieux de Vet. Res. 31 (2000)

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