Acute gastroenteritis, infectious diarrhea is one of the leading causes of illnesses and death in infants and children throughout the world, especially in developing countries. This is so in Asia, Africa and Latin America, where an estimated 2.5 million deaths occur each year in children less than 5 years of age. The identification and diagnosis in most health laboratories is done only for Salmonella spp. and Shigella spp, through culture, biochemical and serological assays, while Entamoeba histolytica, Giardia intestinalis and helminthes are diagnosed by direct microscopic slide method. The...