title: The trend of hydatidosis in kermanshah province, Western iran (1986-2008).
abstract: BACKGROUND
  Hydatidosis is the larval stage of the Echinococcusgranulosus. This disease is endemic in Iran. There are many studies about hydatidosis in different regions of the country, but there is not any information about the disease in Kermanshah Province. This article will review all available data about hydatidosis in this province.
  
  
  METHODS
  Using web based search engines and a survey on medical student's theses, all the information about hydatid cysts in the province from 1986 -2008 was collected.
  
  
  RESULTS
  During these twenty years, at least 482 proven cases of hydatid cyst have been identified in the province. Accordingly, the trend of hydatid cyst operation in the province has been growing and the average annual number of cases has reached 1.41/100,000. Frequency of disease in urban areas was slightly higher than rural areas and the rate of infection in housewives was more than others.
  
  
  CONCLUSIONS
  Because of the growing trend of hydatid cyst operation in Kermanshah Province, which may be due to many different reasons, this province should be considered as one of the important endemic regions of hydatidosis in Iran.
authors.affiliation: Department of Medical Parasitology and Mycology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.
authors.forename: Y
authors.initials: Y
authors.lastname: Hamzavi
authors.forename: M
authors.initials: M
authors.lastname: Vejdani
authors.forename: N
authors.initials: N
authors.lastname: Nazari
authors.forename: A
authors.initials: A
authors.lastname: Mikaeili