Acute Hepatic Failure in Dogs. Acute hepatic failure is a condition characterized by the sudden loss of 70 percent or more of the liver's function due to sudden, massive, hepatic necrosis (tissue death in the liver).
Key Points. Secondary (acquired) immunodeficiencies are much more common than primary (hereditary) immunodeficiencies. Primary immunodeficiencies can affect humoral immunity (most commonly), cellular immunity, both humoral and cellular immunity, phagocytic cells, or the complement system.
Primary immunodeficiency (PI) diseases are characterized in many different ways, including: 1  Low antibody levels. 2  Defects in antibodies. 3  Defects in the cells and proteins of the immune system (for example, T cells, B cells, neutrophils, or the complement system)