In more reduced count, it may indicate hemorrhage, parasites, bone marrow disease, B-12 deficiency, folic acid deficiency or copper deficiency. RBC lives for 120 days so an anemia of any kind other than hemorrhage indicates a long standing problem. Decreased levels means anemia from hemorrhage, parasites, nutritional deficiencies or chronic disease process, such as liver disease, cancer, etc. . Increased levels are often seen in dehydration. The essential oxygen carrier of the blood.
Decreased levels indicate the presence of hemorrhage, anemia, iron deficiency.
Reticulocytes - Immature red blood cells. Decreased count is usually associate with anemia. Increased count is associated with chronic hemorrage or hemolytic anemia. Decrease in number occurs in bone marrow depression, autoimmune hemolytic anemia, systemic lupus, severe hemorrhage or intravascular coagulation. Increased number may occurs with fracture or blood vessel injury, or cancer.