Based on this study and other similar studies, the true incidence of cross-hypersensitivity reactions between penicillin and carbapenems may be lower than previously reported. Carbapenem use may be reasonable for penicillin allergic patients if caution is exercised.

Doxycycline is an effective and inexpensive therapy for the empirical treatment of hospitalized patients with mild to moderately severe community-acquired pneumonia.

A 31-y-old black man with neurofibromatosis, alcoholism and hypertension was admitted because of abdominal pain, hematemesis and cough. In the hospital he had prolonged fever and developed a multiorgan crisis. Despite thorough investigation, no infectious cause for fever was found. Urinary catecholamines and metabolites were markedly elevated. Computerized tomography revealed a mass abutting the left kidney. A diagnosis of pheochromocytoma was made, and as soon as treatment with phenoxybenzamine and propranolol was begun, the fever resolved. Serum interleukin-6 (IL-6) concentration was initially elevated, decreased after the start of adrenergic blockade, and gradually fell to an undetectable level after surgery. These observations suggest that interleukin-6 might have been causally related to the patient's fever and possibly the multiorgan crisis.

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