Severe flea-borne typhus complicated by hemophagocytic lymphohistiocytosis: A case report and review of literature.

Flea-borne typhus (FBT), also known as murine typhus, is a zoonotic infection caused by R. typhi with world-wide distribution. In the United States, the infection is uncommon but remains endemic in some areas, including Los Angeles County. It typically manifests as a benign acute febrile illness but can be complicated in a minority of cases. Associated hemophagocytic lymphohistiocytosis (HLH) has been described in a limited number of cases. Here, we present a case of a patient with FBT complicated by HLH treated empirically with doxycycline with subsequent resolution of HLH. Also included is a review of the literature of other published cases.

Endogenous Endophthalmitis Heralding Central Nervous System Involvement by Nocardia Farcinica.

Nocardiosis is an uncommon opportunistic infection caused by aerobic, gram-positive, weakly acid-fast, filamentous bacteria of the genus Nocardia that presents as a suppurative disease in immunocompromised hosts. Herein the authors describe the case of an elderly male with granulomatosis with polyangiitis (GPA) on chronic immunosuppressive therapy that presented initially with visual symptoms and developed focal neurological deficits. Nocardia should be considered as a potential pathogen in any immunosuppressed patient presenting with endogenous endophthalmitis and new-onset focal neurological deficits. Early recognition and treatment may prevent irrevocable neurological compromise stemming from misdiagnosis.

Lemierre's Syndrome Due to Methicillin-Resistant Staphylococcus aureus.

Lemierre's syndrome is an uncommon and potentially fatal complication of oropharyngeal and facial infections. It involves an associated septic thrombophlebitis, bacteremia, and septic emboli. Traditionally, compromise of the internal jugular vein has been described in conjunction with an infection caused by anaerobes, especially, Fusobacterium necrophorum. In recent years, however, variant forms have been appearing, including other vessel compromise and other etiologic agents. We present the case of Lemierre's syndrome in a 31-year-old male with facial vein thrombosis, septic emboli to the lungs, and bacteremia caused by methicillin-resistant Staphylococcus aureus. We hope that this case will raise awareness about variant presentations and promote a timely diagnosis and appropriate treatment of this potentially fatal infection.