Introduction: Hydatidosis, caused by the larval stage of Echinococcus granulosus, is a prevalent parasitic disease affecting both humans and animals. Albendazole is currently the most effective drug for treating hydatid cysts. This research aimed to investigate the histopathological and biochemical effects of Albendazole on the liver, lung, and kidney of mice experimentally infected by hydatid cysts. Materials and methods: A total of 20 mice weighing approximately 220 g were used. The rats were randomly divided into the Albendazole group (100 mg/kg/day) and the control group (infected Rats without treatment). At the end of the experiment, tissue samples from the liver, lung, and kidney were collected for histopathological evaluation. Liver blood tests were used to assess liver functions or liver injury (alkaline phosphatase, alanine aminotransferase, and bilirubin). Results: After 30 days of daily treatment, the total numbers of cysts, size, and weight of the largest cyst were significantly lower in the Albendazole group, compared to the control group. The study addressed histopathological changes in the liver, kidneys, and lungs caused by hydatid cysts, such as tissue necrosis, hemorrhage, and local inflammation, indicating the potential for serious complications and significant damage to these organs. The group treated with Albendazole showed severe histopathological changes in the liver, kidneys, and lungs, compared to the control group. This suggests that Albendazole may trigger a more aggressive response in these organs to the cysts, leading to increased tissue damage. In addition, alkaline phosphatase, alanine aminotransferase, and bilirubin concentrations revealed a significant increase in the Albendazole group.

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