Objective To understand the competency of clinical laboratorians in microscopic examination of malaria blood slides in Nantong city,and evaluate the quality of blood slide preparation and skills of laboratorians in reviewing the of blood slides for improving the test results in malaria detection. Methods No less than 3% of the negative and full positive blood slides for malaria detection were selected from outpatient laboratories in medical institutions or clinics on counties and districts basis in Nantong ...