Optimal management of diabetes mellitus minimizes or eliminates many of the serious accompanying complications. Proper control can be achieved only by well informed patients cooperating with interested and knowledgeable nurses, dietitians and physicians.Evaluation of the knowledge of diabetes among these groups of medical personnel was carried out by multiple-choice tests and follow-up studies of detection drives. Results indicate that lack of understanding of basic fundamentals of the disease among professional personnel may contribute to inadequate or ineffective patient education.