Direct microscopic count is one of many techniques used to measure bacterial growth. In this method, individual bacterial cells are directly observed and counted using a Petroff-Hausser counting chamber. 

Advantages of direct count

• The technique is straightforward and simple, requiring minimum equipment and setting up
• Results can be obtained within a short time
• Morphology of the bacteria can be studied, allowing for qualitative and quantitative study
• Researchers can count even very dense suspensions on appropriate dilution