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The primary goal of this study was to determine how chronic exposure to Ag influences the functionality of Mycobacterium tuberculosis-specific T cell responses. The frequency of IFN-gamma-producing effector CD4(+) and CD8(+) T cells dynamically changed during persistent M. tuberculosis infection. CD8(+) T cells used differential effector functions during(More)
Major histocompatibility complex (MHC) class I-restricted CD8(+) T cells play a critical role in the protective immunity against Mycobacterium tuberculosis (Mtb). However, only a few Mtb peptides recognized by MHC class Ia-restricted CD8(+) T cells have been identified. Information on epitopes recognized by class Ib-restricted T cells is even more limited.(More)
Pulmonary disease caused by nontuberculous mycobacteria (NTM) is a relatively rare occurrence in immunocompetent children. Two cases of endobronchial NTM infection in immunocompetent children are described. In addition, 41 other children with NTM pulmonary disease reported in the English literature between 1930 and 2003 are reviewed. Clinical manifestations(More)
Reports of clinical manifestations of West Nile virus (WNV) infections in children have been relatively rare. Four cases of WNV infection in children are described: the first report of prolonged encephalitis and fulminant hepatitis caused by WNV, and 3 other presentations of WNV, including the first report of ocular involvement in a child.
Mycobacterium tuberculosis (Mtb) resides in a long-lived phagosomal compartment that resists maturation. The manner by which Mtb antigens are processed and presented on MHC Class I molecules is poorly understood. Using human dendritic cells and IFN-gamma release by CD8(+) T cell clones, we examined the processing and presentation pathway for two Mtb-derived(More)
BACKGROUND Treatment of acute myeloid leukemia (AML) comes with a significant risk of life-threatening infection during periods of prolonged severe neutropenia. We studied the impact of preventive intravenous (IV) antibiotic administration at onset of absolute neutropenia on the incidence and outcome of life-threatening infections during treatment of(More)
Alternate modalities for the treatment of Mycobacterium tuberculosis are needed due to the rise in numbers of immunosuppressed individuals at risk for serious disease and the increasing prevalence of multidrug-resistant isolates. Interleukin-12 (IL-12) has been shown to improve immune responses against M. tuberculosis infection in both humans and mice.(More)
Congenital syphilis continues to occur despite the advances in testing of pregnant women in many countries and the availability of penicillin since 1943. This is a report of a child with multiple systemic manifestations of congenital syphilis. This is one of the few cases of survival with pituitary involvement from congenital syphilis and the first noted(More)
Osteopetrosis, lymphedema, hypohidrotic ectodermal dysplasia, and immunodeficiency (OL-HED-ID) is a rare X-linked disorder with only three reported prior cases in the English-language literature. We describe a case of OL-HED-ID in a male infant who initially presented with congenital lymphedema, leukocytosis, and thrombocytopenia of unknown etiology at 7(More)