Final answer:
The necessary medical intervention for pyelonephritis is typically the administration of antibiotics, which can be oral or intravenous. In more severe cases or when complications such as obstructions are present, surgical drainage may also be necessary. Supportive care like intravenous fluids may also be provided.
Step-by-step explanation:
The necessary medical intervention for pyelonephritis, a serious kidney infection, is typically the administration of antibiotics. These can be given either orally or through intravenous therapy depending on the severity of the infection. For mild cases, oral antibiotics such as fluoroquinolones, penicillins, or cephalosporins may be sufficient. In more severe cases, or in high-risk patients such as those with diabetes, immunosuppression, the elderly, or those with previous renal damage, intravenous antibiotics such as penicillin, vancomycin, carbapenems, or aminoglycosides are required. Additionally, if the infection has led to an obstruction or abscess, surgical drainage may be necessary. Besides antibiotics, supportive care like intravenous fluids may be given to maintain hydration and assist in the elimination of the infection.