Thesis (M.S.)--University of Michigan, 1996.

Thesis (Ph. D.)--Université de Montréal, 1999. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--West Virginia University, 1999. / Title from document title page. Document formatted into pages; contains v, 66 p. : map. Includes abstract. Includes bibliographical references (p. 55-56).

Thesis (Ph. D)--University of Washington, 1999. / Includes bibliographical references (leaves 364-392).

Thesis (Ph.D.) -- University of Texas Southwestern Medical Center at Dallas, 2005. / On campus access only. Vita. Bibliography: 120-147.

Thesis (Ph.D.)--University of British Columbia, 1999. / Title from PDF t.p. (viewed Sept. 22, 2005). Includes bibliographical references and index. Issued also in microfiche. Issued also in print.

Thesis (M.S.)--University of Michigan, 1996.

Made available in DSpace on 2015-05-14T12:56:07Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1184583 bytes, checksum: e7d5f827d1dea31a7b5d11cc69a3c72d (MD5) Previous issue date: 2009-12-11 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The aim of the present study was to assess the oral health status of children infected with HIV virus. A prospective, observational, descriptive, case-control study was carried out in the city of João Pessoa, PB, Brazil. The sample consisted of a study group (SG) made up of 21 children infected with HIV in treatment at the Infectology Unit of the Clementino Fraga Hospital Complex and a control group (CG) of 28 children with no history of HIV infection covered by the Jardim Miramar II Family Health Program. Dental caries indices, (DMFT and deft), gingival status indices (VPI, GBA, OHI-S), resting and stimulated salivary flow and salivary buffer capacity were determined. The deft index was 3.19 ± 3.21(95%CI 1.73-4.66) in the SG and 2.54 ± 1.9 (95%CI 1.78-3.29) in the CG; the DMFT was 3.52 ± 2.6 (95%CI 2.34-4.71) in the SG and 1.32 ± 1.4 (95%CI 0.74-1.90) in the CG (p=0.002). There were statistically significant differences between groups in the decayed component for both the primary (p=0.02) and permanent (p<0.0001) dentition as well as in the filled component for the primary dentition (p<0.0001). The presence of visible biofilm was 52.9% in the SG and 47.1% in the CG (p=0.031). Gingivitis, measured by the gingival bleeding index (GBI) was absent in 57.1% of the SG and 78.5% of the CG (p=0.09). There was a difference between groups in resting saliva flow (p=0.01). There was a high frequency of caries in the SG. The most prevalent need for treatment in the SG was extraction, whereas the most prevalent treatment need in the CG was for procedures of low complexity. The organization of services is suggested for addressing this clinical demand and a health promotion program should be implemented for this population. / Este estudo teve como objetivo avaliar as condições de saúde bucal de crianças infectadas ou não pelo vírus HIV. A amostra foi composta por um grupo de estudo (GE), constituído por 21 crianças infectadas pelo HIV, atendidas no setor de infectologia do Complexo Hospitalar Clementino Fraga e por um grupo controle (GC) de 28 crianças sem história de infecção pelo HIV, atendidas no Programa de Saúde da Família Jardim Miramar II. A pesquisa é do tipo descritiva, observacional, prospectiva, e do tipo caso-controle, e foi desenvolvido em João Pessoa, PB, Brasil. Em ambos os grupos foram determinados o índice de cárie dentária (ceo-d e CPO-D), índices da condição gengival (IPV, ISG, IHO-S), além do fluxo salivar em repouso e o estimulado, e a capacidade tampão da saliva. A análise estatística foi feita através de testes de associação, como o Qui-quadrado e Exato de Fisher, além do teste de Mann-Whitney; todos com nível de significância de 95% (p<0,05). Observou-se ceo-d de 3,19 ± 3,21(IC95% 1,73 - 4,66) GE e 2,54 ± 1,9 (IC95% 1,78- 3,29) GC, já o CPO-D foi de 3,52 ± 2,6 (IC 95% 2,34 - 4,71) GE e 1,32 ± 1,4 (IC95% 0,74 - 1,90) GC (p=0,002). Em relação aos componentes verificou-se diferença estatística para o componente c cariado tanto na dentição decídua (p=0,02) como na permanente (p<0,0001) e para o componente O obturado na dentição decídua (p<0,0001). Observou-se presença de biofilme visível em 52,9% (GE) e 47,1% (GC) (p=0,031). A ausência de gengivite pelo índice de Sangramento Gengival (ISG) foi de 57,1% (GE) e 78,5% (GC) (p=0,09). Observou-se diferença entre os grupos para o fluxo salivar em repouso (p=0,01). Verificou-se alto índice de cárie nas crianças do GE. A necessidade de tratamento mais prevalente foi a extração (GE), enquanto que para o GC foi de procedimentos de baixa complexidade. As condições da saúde bucal das crianças com HIV não foram satisfatórias quando comparadas às do GC.

Infection with human immunodeficiency virus type 1 (HIV-1) results in a wide range of immunologic and hematopoietic abnormalities. The overall goal of this dissertation was directed toward obtaining a better understanding of the interactions of HIV-1 and myeloid cells in relation to the pathogenesis of AIDS. The human myelomonocytic cell line, HL-60, was used as a model system to determine if HIV-1 infects myeloid progenitor cells and subsequently, if infection affects their differentiation. HL-60 cells and the human prototypic T cell line, H9 were infected with three different HIV-l isolates (IIIB, PM213, and NL4-3) which are known to infect T cells. All three isolates productively infected both H9 and HL-60 cells; however, HIV-1 antigen expression and cytopathicity was delayed by approximately 15 days in infected HL-60 cells compared H9 cells. To examine the effect of HIV-l infection on myeloid differentiation, chronically infected HL-60 cells and clonal lines derived from them were induced to differentiate into either granulocytes by treatment with dimethyl formamide (DMF) or into monocytes by treatment with phorbol l2-myristate 13 acetate (PMA). By both cellular morphology and function, approximately the same percentage of treated, HIV-infected HL-60 cells differentiated into either granulocytes or monocytes as treated, control HL-60 cells. Taken together, these results indicate that HIV-1 infection does not affect the morphological or functional differentiation of HL-60 cells. In an effort to understand the differences in the regulation of HIV-l infection in myeloid versus T cells, the life cycle of NL4-3 was examined in HL-60 cells and H9 cells. Initially, NL4-3 replication was restricted in HL-60 cells compared to H9 cells. This restriction was overcome 15 days after infection by the generation of a viral isolate, NL4-3(M). NL4-3(M), harvested during the lytic phase of NL4-3 infection of HL-60 cells, caused cell death approximately 8 days after infection in both H9 and HL-60 cells. Although measurements of viral entry kinetics demonstrated that the timing of entry of NL4-3 and NL4-3(M) in HL-60 cells and NL4-3 in H9 cells was similar, a quantitative polymerase chain reaction (PCR) analysis of newly reverse transcribed NL4-3 DNA in H9 and HL-60 cells revealed that NL4-3 infected H9 cells and NL4-3(M) infected HL-60 cells contain consistently higher amounts of newly reverse transcribed DNA than NL4-3 infected HL-60 cells. The delay in NL4-3 replication in HL-60 cells was further amplified by inefficient spread of the virus throughout the HL-60 culture as measured by RNA production and DNA integration suggesting that another step in the viral life cycle after reverse transcription was also restricted. These results suggest that the efficiency of NL43 replication in HL-60 cells is restricted at several steps in the viral life cycle. Further, these restrictions are overcome by the generation of a viral variant, NL4-3(M), which efficiently replicates in myeloid cells. The tropism of NL4-3(M) was further characterized by testing its growth in monocyte-derived macrophages (MDM). Unlike NL4-3, NL4-3(M) productively infected MDM cultures. The ability of NL4-3(M) to infect macrophages was conferred by the envelope gene. This was demonstrated by the ability of the recombinant virus, NL4-3envA, which contains the envelope of NL4-3(M) in the context of the NL4-3 genome, to infect and replicate in MDM cultures. The envelope gene of NL4-3(M), however, did not confer ability to rapidly kill HL-60 cells. Together, these findings demonstrate that viral determinants controlling entry into MDM are different trom the determinants controlling the cytopathic phenotype in HL-60 cells.

>Magister Scientiae - MSc / The aim of this study is to investigate the perceived stigmatization of and discrimination against people who are HIV positive or people who are living with AIDS. One questionnaire was used to collect qualitative and quantitative data. Data collection was conducted for a period of three weeks in the Eastern Cape province at the Zwartwater area in Lady Frere and at the Queenstown (Frontier) Hospital. A sample of 170 (of the 900) females was interviewed, of which 100 were sequentially sampled from the community and 70 were sequentially sampled whilst they were queuing at the Queenstown (Frontier) Hospital for care. Households from the rural area were selected by visiting every fourth house on the route linking the houses in this area. At the hospital, selection started at the back of the queue and every sixth person was selected and interviewed. Scores were calculated for knowledge and attitudes towards people who are HIV positive and towards people who have AIDS. It was found that knowledge and attitude scores did not differ between the various age groups tested. It was furthermore found that an increased knowledge score improved attitudes towards people who are HIV-positive or have AIDS.