What causes nephritis?

Here i am, trying to concentrate on what to write next. And behind me on the bed, hubby is mumbling away something about what causes nephritis and asked me to Google for it. Oh well, so here's a very brief excerpt from an online site as to what nephritis is:

"Nephritis refers to inflammation of one or both kidneys. It can be caused by infection, but is most commonly caused by autoimmune disorders that affect the major organs. For example, those with lupus are at a much higher risk for developing nephritis. In rare cases nephritis can be genetically inherited, though it may not present in childhood.

Nephritis is a serious medical condition which is the ninth highest cause of human death. As the kidneys inflame, they begin to excrete needed protein from the body into the urine stream. This condition is called proteinuria. Loss of necessary protein due to nephritis can result in several life-threatening symptoms. Most dangerous in cases of nephritis is the loss of protein that keeps blood from clotting. This can result in blood clots causing sudden stroke."

Let me say it one more time, the above texts were taken from wisegeek. I did not write the above on what is nephritis and what causes nephritis. So, do consult your doctor for more information about nephritis and how to treat it.