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...Chapter two collection of urine specimen preservation acknowledgements addisa ababa university jimma hawassa haramaya gondar american society for clinical pathology center disease control and prevention ethiopia objectives at the end this students will be able to identify factors affecting quality a list basic procedures prequations describe types specimens commonly used preservatives differentiate advantages disadvantages its use in order make urinalysis reliable must properly collected improper may invalidate results laboratory no matter how carefully skillfully tests are performed sample should delivered as soon possible lab after if delay is necessary appropriate based on test added instruct patient bring mid stream avoid samples that contaminated with blood case manusteral women container wide opened dried clean containers bottles disposable plastic poystrine waxy coated paper caps urin tek tube note mouth dry leak proof...