Hemophagocytic Lymphohistiocytosis Due to Ehrlichiosis: A Case Series.

Background: Hemophagocytic lymphohistiocytosis (HLH) is an immunologic syndrome characterized by excessive inflammation and tissue injury due to uncontrolled activation of the phagocytic system. The underlying mechanism is a lack of downregulation of activated macrophages and lymphocytes by natural killer and T cells. Unfortunately, the diagnosis is often delayed or missed due to the rarity of the disease, decreased awareness, and clinical picture variability.

Group B Streptococcus Meningitis Associated with Acute Otitis Media in an Adult Patient.

BACKGROUND We present a case of Group B Streptococcus (Streptococcus agalactiae or GBS) meningitis in a non-pregnant woman that likely originated from acute otitis media. Although invasive Group B Streptococcal infections are increasing in the United States, GBS meningitis is still rare in non-pregnant adults. At the end, we discuss risk factors for this disease and data that suggest that invasive GBS infection is increasing in the adult and elderly populations of the United States.