Background: Echinococcosis remains endemic despite attempts to reduce the prevalence of this disease. The objective of the study was to evaluate the results of an intervention program based on antiparasitic therapy directly administered to the dogs for the control of Echinococcus in an endemic area of ​​ cystic echinococcosis (CE). Methods: The dog faeces were analyzed by coproantigen using the immunoenzymatic technique for the diagnosis of echinococcosis before and after the direct and

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... administration of praziquantel 5mg by kg orally in three doses every 30 days each cycle was 2 times at year for two consecutive years. Results: A total of 252 dogs entered the study, of them 119 (47%) dogs had positive results for Echinococcus at the beginning of the intervention. The adverse effects that occurred with the administration of prazicuantel were vomiting (13%), diarrhea (2.4%) and lethargy (2%); 229 dogs completed the 4 cycles of praziquantel treatment. The presence of a positive coproantigen was evident in 03 (1.3%) dogs at the end of the study. Conclusions: Antiparasitic chemotherapy administered directly to the dogs periodically managed to reduce the prevalence of canine echinococcosis.