•The specific cause of most cases of chronic glomerulonephritis is unknown.
•Viral infections, such as hepatitis B or C and acquired immunodeficiency syndrome (AIDS), may lead to chronic glomerulonephritis.
•Autoimmune disorders, such as systemic lupus erythematosus, or other causes of vasculitis (inflammation of small blood vessels) may cause chronic glomerulonephritis.
•Acute glomerulonephritis may, after a symptom-less period of many years, reappear as chronic glomerulonephritis.