This document discusses pulmonary echinococcosis, which is caused by the larval stage of the tapeworm Echinococcus. Humans can be infected through contact with dog feces containing Echinococcus eggs. The larvae then develop into cysts, often in the lungs. Symptoms may include cough and fever if a cyst ruptures. Diagnosis involves imaging tests and serological analysis. Surgical removal of the cysts is the primary treatment, along with anti-parasitic drugs to prevent recurrence. Prevention involves proper hygiene around dogs and disposal of sheep carcasses.