Presently, dark field blood microscopy is the only way to observe live blood cells. Practitioners take a small amount of blood from a patient, apply the sample to a slide and observe the blood. Most blood-microscopes come equipped with a camera and video equipment, allowing both the practitioner and patient to view the specimen together. In addition to red blood cells (RBCs), white blood cells (WBCs) and plasma, blood microscopy is believed to show items within the plasma such as: undigested food particles, fungus, crystals, microbes, and bacteria. Many Practitioners also claim to observe pleomorphic activity, the condition of major organs, mal-absorption of proteins, lipids and nutrients and immune system disorders.