Practice 5: Compare if You Dare Fill in the blanks. (blank) differ from the rest of the infectious agents because they are not living organisms. Many infectious agents are microscopic or submicroscopic but the (blank) include organisms that you can see without a microscope. Many diseases caused by parasites, (blank) and bacteria can be cured with medicine. Many infections from parasites, viruses, fungi and (blank) can be prevented by washing your hands​