The present study aimed to isolate and identified a yeasts from water and sediments of 25 rivers in Basrah Governorate, Iraq.The period of collection started from April 2014 to February 2015.Potato dextrose agar was used to isolate yeasts from filtered water and diluted sediments.It was possible to obtain 300 pure isolates of yeasts which were identified to species level by one of the advanced tec...