Final answer:
A blood smear is created by spreading a thin film of blood on a microscope slide and staining it. The stained slide can then be examined under a microscope to evaluate the appearance of blood cells and identify different types of white blood cells. Blood smears can also be used to identify bacterial pathogens.
Step-by-step explanation:
A blood smear is created by spreading a thin film of blood on a microscope slide. This slide is then stained using a Wright-Giemsa stain, which allows for the visualization of the different types of blood cells. The stained blood smear can be examined under a microscope to evaluate the appearance of the blood cells and count the number of different types of white blood cells present. Additionally, blood smears can be examined to identify any bacterial pathogens associated with disease.