Scurvy: an often forgotten cause of bleeding.
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Hemorrhage↗
Biomedical subjects
Kathleen Smith
Publications and source records attributed to Kathleen Smith.
Overview of Merkel cell carcinoma and recent advances in research.
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Antineoplastic Agents↗
Do the physical and histologic features and time course in acute generalized exanthematous pustulosis reflect a pattern of cytokine dysregulation?
BACKGROUND: Acute generalized exanthematous pustulosis (AGEP) is characterized by fever and an indurated erythematous eruption early, with the development of nonfollicular pinhead sterile pustules on an erythematous background. The eruption progresses and resolves relatively rapidly. Although drugs are believed to be the major etiologic agents, other immune modulators, including infections, heavy metals, and radiation, have been implicated. OBJECTIVE: The purpose of this study was to document underlying diseases in patients with AGEP and to determine if this data and the histologic features suggested an underlying pattern of immune dysregulation. METHODS: Twenty-one patients with new or recurrent episodes of AGEP were questioned concerning underlying diseases. The histopathologic features seen in the biopsy sections and the approximate time of biopsy during the course of their eruptions were recorded. RESULTS: Two patients had a history of psoriasis and one patient had a family history of psoriasis, two patients had diagnoses of sarcoid, two patients had inflammatory bowel disease, one had autoimmune thyroiditis, and one patient had multiple sclerosis. Biopsies done at the onset of the eruption showed marked to moderate papillary dermal edema and a mixed dermal inflammatory infiltrate. Shortly thereafter, biopsies showed spongiform pustules within the epidermis and occasional dyskeratotic cells with residual perivascular dermal edema. Although no definitive vasculitis was seen, there was leukocytoclasis within the dermal infiltrate in the majority of biopsy specimens performed more than 48 hours after the onset of the eruption. CONCLUSION: The histologic features seen in AGEP and the disease associations suggest that patients who develop this eruption may have an underlying tendency for development of a pattern of immune dysregulation characterized by a T helper-1 cytokine pattern.
Acute Disease↗
Antimicrobial residues in animal waste and water resources proximal to large-scale swine and poultry feeding operations.
Expansion and intensification of large-scale animal feeding operations (AFOs) in the United States has resulted in concern about environmental contamination and its potential public health impacts. The objective of this investigation was to obtain background data on a broad profile of antimicrobial residues in animal wastes and surface water and groundwater proximal to large-scale swine and poultry operations. The samples were measured for antimicrobial compounds using both radioimmunoassay and liquid chromatography/electrospray ionization-mass spectrometry (LC/ESI-MS) techniques. Multiple classes of antimicrobial compounds (commonly at concentrations of > 100 microg/l) were detected in swine waste storage lagoons. In addition, multiple classes of antimicrobial compounds were detected in surface and groundwater samples collected proximal to the swine and poultry farms. This information indicates that animal waste used as fertilizer for crops may serve as a source of antimicrobial residues for the environment. Further research is required to determine if the levels of antimicrobials detected in this study are of consequence to human and/or environmental ecosystems. A comparison of the radioimmunoassay and LC/ESI-MS analytical methods documented that radioimmunoassay techniques were only appropriate for measuring residues in animal waste samples likely to contain high levels of antimicrobials. More sensitive LC/ESI-MS techniques are required in environmental samples, where low levels of antimicrobial residues are more likely.
Animal Feed↗
Human epithelial cells trigger dendritic cell mediated allergic inflammation by producing TSLP.
Whether epithelial cells play a role in triggering the immune cascade leading to T helper 2 (T(H)2)-type allergic inflammation is not known. We show here that human thymic stromal lymphopoietin (TSLP) potently activated CD11c(+) dendritic cells (DCs) and induced production of the T(H)2-attracting chemokines TARC (thymus and activation-regulated chemokine; also known as CCL17) and MDC (macrophage-derived chemokine; CCL22). TSLP-activated DCs primed naïve T(H) cells to produce the proallergic cytokines interleukin 4 (IL-4), IL-5, IL-13 and tumor necrosis factor-alpha, while down-regulating IL-10 and interferon-gamma. TSLP was highly expressed by epithelial cells, especially keratinocytes from patients with atopic dermatitis. TSLP expression was associated with Langerhans cell migration and activation in situ. These findings shed new light on the function of human TSLP and the role played by epithelial cells and DCs in initiating allergic inflammation.
Adult↗
Host-vs.-altered-host eruptions in patients on liposomal doxorubicin.
BACKGROUND: Anthracycline antitumor antibiotics are the most commonly used chemotherapeutic agents. One of these is doxorubicin. Liposomal doxorubicin was developed as a drug delivery system in order to deliver the active drug intracellularly while decreasing the systemic toxicity, particularly hematological and cardiac toxicity. METHODS: The clinical and histologic findings of the cutaneous eruptions of associated with liposomal doxorubicin are reviewed. RESULTS: The eruptions occurred in three women with metastatic ovarian carcinoma who were treated with liposomal doxorubicin. These three patients developed erythematous macular/papular to plaque cutaneous lesions, and in one patient a vesicular component. The eruptions involved the trunk and extremities approximately 3-4 weeks after completions of therapy. None of the patients had any documented infections, and none of the patients had symptoms other than pruritus. The eruptions cleared over a period of weeks to months. Histologic features included an interface dermatitis with numerous apoptotic/dyskeratotic cells within the epidermis, with involvement the intra-epidermal sweat ducts and the infundibulum of hair follicles. CONCLUSION: We believe that these eruptions represented a chemotherapy induced host-vs.-altered host reaction.
Acanthosis Nigricans↗
Cutaneous lesions showing giant yeast forms of Blastomyces dermatitidis.
BACKGROUND: The yeast forms of Blastomyces dermatitidis usually range from 8 to 15-20 micro m in diameter. Larger yeast forms have previously been reported only twice in immunosuppressed patients. In both patients these large forms were seen within the lung. CASE REPORT: We present a 14-year-old cardiac transplant patient, who presented 36 days following his transplantation with acute respiratory distress followed a few days later by erythematous cutaneous papules. RESULTS: Biopsy of a skin lesion showed yeast forms, some greater than 40 micro m in diameter, within and surrounding dermal vessels. Cultures later grew Blastomyces dermatitidis. CONCLUSIONS: To our knowledge this is the first reported case of giant forms of Blastomyces dermatitidis within the skin. With increased iatrogenic immunosuppression, we may expect to see more diverse morphologic forms with deep fungal infections.
Adolescent↗
Successful interdisciplinary documentation through nursing interventions classification.
Automated documentation systems enable health care professionals to develop dynamic, interdisciplinary care plans. Use of a standardized nomenclature provides a common framework and language for the communication of the plan, and also can support data collection to determine best clinical practices. A comprehensive patient care record will link the interdisciplinary care plan to clinical charting and the documentation of outcomes. This article reviews efforts to improve interdisciplinary communication by computerizing the documentation system, using the Nursing Interventions Classification (NIC).
Benchmarking↗
A public health nursing practice model: melding public health principles with the nursing process.
There has been a shift in emphasis in public health from the provision of personal health services for individuals to efforts targeted at improving the health of the whole community. Many in public health nursing (PHN) have welcomed this shift, recognizing the important role PHN can play in promoting health and preventing disease for all. There continues to be a need to redefine PHN roles and practice so that public health nurses can participate more effectively. Los Angeles County Department of Health Services Public Health Nursing (LAC PHN) has developed a practice model grounded in nationally recognized components: the public health team, PHN standards of practice, the 10 Essential Public Health Services, Healthy People 2010's 10 Leading Health Indicators and additional local indicators, and the Minnesota Public Health Nursing Interventions Model. The LAC PHN Practice Model provides a conceptual framework that assists in clarifying the role of the public health nurse and presents a guide for public health practice applicable to all public health disciplines.
Community Health Planning↗
The reinvigoration of public health nursing: methods and innovations.
Los Angeles County (LAC) restructured and reinvigorated public health in response to nationwide concern over the adequacy of all public health infrastructures and functions. LAC's reorganization into geographically defined service planning areas (SPAs) has facilitated the integration of core public health functions into local practice. Public health nurses practicing as generalists within their SPA identified three initial objectives to address in population-based care: (1) expanding practice beyond disease control to a more holistic approach, (2) providing consultation using the Ask-the-Nurse innovation, and (3) developing a community assessment database for interdisciplinary SPA health planning. Additional innovative objectives are planned for the future.
Community Health Planning↗