What is the difference between acute pyelonephritis and acute glomerulonephritis?

Here are some...: Pyelonephritis denotes kidney infection usually extended from its hollow part called renal pelvis, but occasionally maybe a blood-borne infection to kidneys. Glomerulonephritis denotes inflammatory change specifically affecting microfilters (glomeruli) & their associated tubules, which usually result from streptococcal infection, autoimmune disorders, drugs, diseases like diabetes or hypertension.