system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Hydatid disease of liver is caused by -
assistant
The correct answer is  The larval stage is present in the animals including man,giving rise to hydatid cyst.Sheep ,pigs,cattle ,horse ,goat and man may act as intermediate host. Hydatid cyst involve liver , lung,brain,hea,kidney,spleen,bone,musclesetc. Liver is the commonest site and right lobe is frequently involved.The disease remains symptomless for many years.Chronic abdominal discomfo may be present in case of liver cyst.Cyst in the lungs are asympotomatic but may cause cough , breathlessness or chest pain (refer pgno:107 baveja 3 rd edition,panikers textbook of Medical parasitology 8th edition page 131)