investigators will take stool and blood samples from two groups of humans :- 1-group A (healthy group negative Giardia or control group),2-group B (positive Giardia or case group)then investigators make estimation for vitamin D in both groups then investigators try to find if there is relation between vitamin D level and Giardia lamblia infections
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fluctuation level of vitamin D level
Timeframe: 1 year
Mohammed Sayed Farrag, Demonstrator