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2010

Immunology and Infectious Disease

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Articles 151 - 154 of 154

Full-Text Articles in Life Sciences

Investigation Of Murine Spleen As A Niche For Hematopoiesis., Jonathan Tan, Helen O'Neill Dec 2009

Investigation Of Murine Spleen As A Niche For Hematopoiesis., Jonathan Tan, Helen O'Neill

Helen O'Neill

Background Spleen as a lymphoid tissue is specialized for monitoring blood and mounting immunity against blood-borne antigens. Antigen-presenting cells present in spleen commonly develop from bone marrow-derived precursors that enter blood circulation. However, a distinct splenic myeloid antigen-presenting cell subset described in this laboratory, namely “dendritic-like cells” (L-DC), has been hypothesized not to share a bone marrow origin. Methods In this study, the presence of endogenous hematopoietic progenitors in spleen was investigated by transplanting intact spleen into allotype-distinct recipients and monitoring development of progeny cells in grafted tissues. Results Successful engraftment of donor spleens was achieved for up to 4 …

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Contributions Of Francisella Tularensis Subsp. Novicida Chitinases And Sec Secretion System To Biofilm Formation On Chitin, Jeffrey J. Margolis, Sahar H. El-Etr, Lydia-Marie Joubert, Emily Moore, Richard Robinson, Amy Rasley, Alfred M. Spormann, Denise M. Monack Dec 2009

Contributions Of Francisella Tularensis Subsp. Novicida Chitinases And Sec Secretion System To Biofilm Formation On Chitin, Jeffrey J. Margolis, Sahar H. El-Etr, Lydia-Marie Joubert, Emily Moore, Richard Robinson, Amy Rasley, Alfred M. Spormann, Denise M. Monack

Jeffrey Margolis

Francisella tularensis, the zoonotic cause of tularemia, can infect numerous mammals and other eukaryotes.
Although studying F. tularensis pathogenesis is essential to comprehending disease, mammalian infection is
just one step in the ecology of Francisella species. F. tularensis has been isolated from aquatic environments and
arthropod vectors, environments in which chitin could serve as a potential carbon source and as a surface for
attachment and growth. We show that F. tularensis subsp. novicida forms biofilms during the colonization of
chitin surfaces. The ability of F. tularensis to persist using chitin as a sole carbon source is dependent on
chitinases, …

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Prevalence Of Scabies And Head Lice Among Children In A Welfare Home In Pulau Pinang, Malaysia, Jamaiah Ibrahim Dec 2009

Prevalence Of Scabies And Head Lice Among Children In A Welfare Home In Pulau Pinang, Malaysia, Jamaiah Ibrahim

Jamaiah Ibrahim

This is a survey of 120 children for scabies and head lice infestations in a welfare home in Pulau Pinang. Children from this welfare home (Rumah Kanak-Kanak Taman Bakti, Kepala Batas, Pulau Pinang) were randomly selected. Majority of them were Malays (72.5%) and the rest were Indians. The infestation rates were highest in the 10-12 years age group with 46% and 70% for scabies and head lice respectively. Head lice was more commonly seen in girls (65%) than boys (29%). Scabies was more commonly seen in boys (50%) than girls (16%). Overall prevalence rate for scabies was 31% and for …

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An Intervention To Prevent Symptoms Associated With Hepatitis C: A Pilot Study, Donna M. Zucker Dec 2009

An Intervention To Prevent Symptoms Associated With Hepatitis C: A Pilot Study, Donna M. Zucker

Donna M. Zucker

The objectives of this study were to (a) pilot test instruments measuring fatigue and quality of life (QOL); (b) pilot test an exercise intervention; and (c) estimate the effect size of this intervention relative to completion of combination therapy, fatigue, QOL, and walking distance in 20 patients with chronic hepatitis C about to begin interferon alpha and ribavirin treatment. Alpha reliabilities for both the Schwartz Cancer Fatigue Scale and Hepatitis Quality of Life Questionnaire were moderately high. Power analyses of all outcome measures indicated a small effect size and sample size estimate of 30–40 per group to achieve power of …

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