The objective of the current study was to determine the incidence of common types of parasites encountered in the Central Region of Saudi Arabia. The current study is a retrospective study which includes the results of 10427 stool sample and occult blood sample. The results obtained during last two years (2005-2007), were compared to the earlier reports on parasites in the Central as well as other regions of Saudi Arabia. Attempts were made to find out the cases of increasing and/or decreasing trend of parasite incidence and to locate any differences between the current study results and the earlier reports.

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