Nocardiosis: When the Side Effects of Therapy Mimic Symptoms.

Nocardiosis is a rare infection caused by gram-positive aerobic actinomycetes, which are common in soil. Inoculation occurs by inhaling agent fragments that cause localized or systemic suppurative lesions. The diagnosis is established based on isolation in cultural examinations. Trimethoprim-sulfamethoxazole (TMP-SMX) is the first-line treatment, and an antimicrobial susceptibility test is useful in severe cases or when there is no clinical response. The duration of treatment is determined by the affected site. However, the treatment cycles are long, and recurrence is common, which has a negative impact on the prognosis. We describe a case of an immunocompetent male with a recent diagnosis of pulmonary nocardiosis who, after starting therapy, presented with symptoms that could be explained by either disease progression or an adverse pharmacological reaction. Throughout this case, with atypical evolution, the authors review the diagnostic and therapeutic approach to Nocardia infection and alert to the importance of the differential diagnosis and available therapeutic options.

Jaundice as a Rare Manifestation of Epstein-Barr Virus Primary Infection.

Epstein-Barr virus (EBV) primary infection usually presents with classic symptoms of infectious mononucleosis (IM) like fever, lymphadenopathies and tonsillopharyngitis. Liver damage is frequently mild and self-limited and there are only a few cases of severe EBV-induced cholestatic hepatitis and jaundice reported in the literature. The authors present the case of a 22-year-old woman who was admitted with acute fever and jaundice. Physical examination revealed posterior cervical lymphadenopathies and painful hepatosplenomegaly. Laboratorial findings suggested an obstructive cause for jaundice but ultrasound and magnetic resonance cholangiopancreatography excluded biliary duct pathology. Heterophile antibodies were negative but EBV-specific antibodies revealed isolated positive viral capsid antigen (VCA) immunoglobin (Ig) M suggesting the diagnosis of early phase of EBV primary infection. The diagnosis of EBV-induced cholestatic hepatitis was confirmed after identification of EBV deoxyribonucleic acid (DNA) in blood and by liver biopsy. Supportive management was provided and, despite an initial clinical deterioration, the patient had a favorable outcome. EBV is a virus with a high prevalence worldwide, mainly subclinical, and jaundice is a rare manifestation of the infection. Although the majority of the patients recover without sequelae, progression to liver failure has been described and a careful assessment for complications is mandatory. Therefore, EBV infection should be included in the comprehensive differential diagnosis of jaundice in all age groups.