Normal Saline in Direct Fecal Smears: Enhancing Parasite Identification

Normal saline is routinely used in direct fecal smear preparations to improve parasite differentiation. It helps distinguish organisms like Entamoeba histolytica trophozoites from white blood cells and other debris, which is especially important in suspected amoebic dysentery.

The saline maintains organism motility and morphology, aiding accurate microscopic identification.