Literatura académica sobre el tema "AIDS in three stages"

This article presented an overview of AIDS. The disability involves three diagnoses: HIV Antibody Positive Tests, AIDS Related Complexes and AIDS. AIDS is transmitted through sexual intercourse, sharing unclean needles and use of contaminated blood. AIDS is incurable although the use of Azidothymidine (AZT) has shown some promise. Three categories of clients involving four stages of reaction are presented. Rehabilitation counselor interventions and vocational implications are discussed.

In Brazil relatively little attention is being paid to the study of the features of the spread of the AIDS epidemic towards small cities and rural areas. We report a descriptive study on the epidemiological features of HIV infection among 208 adult patients seen between July 1999 and May 2006 in the municipal HIV/AIDS Programs of three cities of inner Rio de Janeiro State: Saquarema, Santo Antonio de Pádua and Miracema. A portrait of a heterosexual epidemic emerged, with an overall male to female ratio of 1.1. More than 90% were residents of the studied cities, demonstrating a local demand for HIV-related assistance and the importance of municipal HIV/AIDS Programs. Past or current use of snorted cocaine was reported by a quarter of the patients. Older age and male gender were independent predictors of having a diagnosis of AIDS at presentation. The latter is in accordance with a more recent wave of epidemic spread towards female gender. A low frequency of male circumcision, an important determinant of heterosexual HIV transmission, was recorded. Almost 60% of the patients first presented in advanced stages of HIV infection, suggesting the existence of a large pool of undiagnosed cases in the community.

The symbiosis (Sym) and pathogenesis (Pat) is a duality problem of microbial infection, including HIV/AIDS. Statistical analysis of inequalities and duality in gene coexpression networks (GCNs) of HIV-1 infection may gain novel insights into AIDS. In this study, we focused on analysis of GCNs of uninfected subjects and HIV-1-infected patients at three different stages of viral infection based on data deposited in the GEO database of NCBI. The inequalities and duality in these GCNs were analyzed by the combination of the double-connectivity (DC) approach and the Gini's method. DC analysis reveals that there are significant differences between positive and negative connectivity in HIV-1 stage-specific GCNs. The inequality measures of negative connectivity and edge weight are changed more significantly than those of positive connectivity and edge weight in GCNs from the HIV-1 uninfected to the AIDS stages. With the permutation test method, we identified a set of genes with significant changes in the inequality and duality measure of edge weight. Functional analysis shows that these genes are highly enriched for the immune system, which plays an essential role in the Sym-Pat duality (SPD) of microbial infections. Understanding of the SPD problems of HIV-1 infection may provide novel intervention strategies for AIDS.

Context.—Kaposi sarcoma (KS) is a vascular tumor frequently associated with advanced human immunodeficiency virus infection, advanced age, or iatrogenic immunosuppression. Immunohistochemistry for CD31 and CD34, and more recently for FLI1 and D2-40, has been used as ancillary diagnostic tests for KS, despite little information regarding the sensitivities and differential staining patterns of the latter 2 markers in the major clinical subtypes and histologic stages of KS. Objective.—This retrospective study aims to assess the prevalence of the vascular markers D2-40 and FLI1 in the main clinical subgroups and tumor stages of KS. Design.—Twenty-four cases of KS (12 acquired immunodeficiency syndrome [AIDS]–related cases and 12 non–AIDS-related cases; 11 nodular-stage and 13 patch/plaque–stage KS) were stained for CD34, CD31, D2-40, and FLI1 by immunohistochemistry. The distribution of immunoreactivity was compared between the clinical subtypes and tumor stages of KS using the Mann-Whitney test. Results.—CD31, CD34, D2-40, and FLI1 strongly and diffusely stained tumor cells in 75%, 92%, 67%, and 92% of AIDS-related cases and 58%, 92%, 67%, and 75% of non–AIDS-related cases, respectively. Differences in the proportions of positive cases between AIDS-related and non–AIDS-related cases did not reach statistical significance. No significant staining differences were observed between nodular- and patch/plaque–stage KS either. Conclusions.—There are no differences in the distribution of immunohistochemical reactivity for CD31, CD34, D2-40, or FLI1 between AIDS-related and non–AIDS-related KS or between nodular- and patch/plaque–stage KS. All of the markers studied demonstrated high sensitivity in both clinical settings and both stages of tumor progression.

The decline in AIDS deaths in the USA between 1995 and 2002 has been attributed by Centers for Disease Control (CDC) to HIV treatments advances. The purpose of the present study is to assess whether this AIDS deaths decline was due entirely to treatment advances, to earlier prevention successes, or a combination of both. Secondarily, we quantitatively estimate the number of AIDS deaths averted (or delayed) by treatment advances over and above prevention effects. The study employed scenario analysis to address the research questions. To answer the primary research question, we examined whether three key predictions derived from the shape and peak of the HIV incidence curve in the USA (and the natural history of HIV disease in the era before highly active antiretroviral therapy [HAART]) about the shape and peak of the AIDS deaths curve were upheld (e.g., one prediction was that the peak of the AIDS deaths curve should occur 10–12 years after the peak of the HIV incidence curve). To the extent that these predictions are supported, there is evidence that earlier HIV prevention efforts impacted the number of AIDS deaths later in the epidemic. To answer the second research question, the observed annual AIDS deaths curve (1995–2002) was compared with three estimated AIDS deaths curves that may have occurred had HAART never became available. Three estimations were employed to reflect a range of assumptions about the lag between the flattening of HIV incidence in the USA and the flattening of AIDS deaths (i.e., 10, 11 or 12 years). For any one of the three-scenario analyses, the quantitative area between the 'observed' and 'estimated' AIDS deaths curves provide an estimate of the number of AIDS deaths averted by HIV/AIDS treatments. The three predictions from the HIV incidence curve (and the pre-HAART natural history of HIV disease) for determining the shape and peak of the AIDS deaths curve were supported thereby indicating the influence of past prevention efforts on recent AIDS deaths. However, the observed decline in AIDS deaths was more precipitous than predicted (indicating the influence of treatment advances). The scenario analyses indicated that between 33,480 and 41,784 AIDS deaths were averted (or delayed) between 1995 and 2002 as a function of treatment. That is, approximately, 206,037 AIDS deaths occurred between 1995 and 2002 (in the HAART era), but between 239,517 and 247,821 likely would have occurred without the advent of HAART. We conclude that both past prevention and current treatment services have lead to the AIDS deaths decline in the USA, and that HAART has averted between 33,480 and 41,784 AIDS deaths in the USA between 1995 and 2002 over and above the effects of early prevention efforts.

We had constructed mathematical model of HIV/AIDS with seven compartments. There were two different stages of infection and susceptible subpopulations. Two stages in infection subpopulation were an HIV-positive with consuming ARV such that this subpopulation can survive longer and an HIV-positive not consuming ARV. The susceptible subpopulation was divided into two, uneducated and educated susceptible subpopulations. The transmission coefficients from educated and uneducated subpopulations to infection stages were where (( and ) ( and )) In this paper, we consider the case of and were zero. We investigated local stability of the model solutions according to the basic reproduction number as a threshold of disease transmission. The disease-free and endemic equilibrium points were locally asymptotically stable when and respectively. To support the analytical results, numerical simulation was conducted.

In this paper we develop and analyse a model for the spread of HIV/AIDS amongst a population of injecting drug users. We examine the impact on the spread of disease caused by allowing addicts to progress through three distinct stages of variable infectivity prior to the onset of full blown AIDS. We first state a three stage infectivity model of the transmission of HIV and perform an equilibrium and stability analysis on this model. We find that there is a critical threshold parameter R0 which determines its behaviour. If R0≤1 then there is a unique disease-free equilibrium which is globally stable. If R0>1 then there is a unique endemic equilibrium which is locally stable. Simulations indicate that if R0>1, then provided disease is initially present it will tend to the endemic equilibrium. We also extend this model to include recruitment and mortality from AIDS, and find that its long-term behaviour is similar to that of the simple model. We then look briefly at a stochastic version of the model and simulations indicate that again the disease dies out if R0<1 and if R0>1 the long-term conditional mean prevalence of disease is approximately the same as in the simple model. We examine the implications of our results for the prevention of the spread of HIV and AIDS amongst drug users. A short discussion concludes the paper.

Development research focused on developing Courselab-based learning aids on the principle of Light Vehicle Engine Expertise which includes Student Books, Student Activity Sheets and Lesson Plans for grade XI SMK students. The model of development used in this research refers to the model of learning aids development of Dick & Carey which consists of three phases, namely (1) identification phase; at this stage the writing of goals and analysis of instructional learning is conducted, identifying initial behaviors and characteristics of the students, (2) development phase; at this stage the Courselab-based learning tools is developed by formulating the goals and the standard reference tests, as well as developing the strategies and the learning aids, (3) testing and evaluation phase. The developed Courselab-based learning aids has been validated by two experts with revision to obtain a result which is fit to use. The tests carried out in three stages, namely one-on-one testing, small group testing conducted at SMK Nasional Makassar to evaluate the practicality of the learning aids and limited testing conducted at SMK Darussalam Makassar to evaluate the practicality and the effectiveness of the learning aids. The research results show that the developed learning aids, after the validation, was declared valid. The learning aids is attributed practical as the students responded positively to the learning aids they used. The learning aids is considered effective as the students responded positively to the learning aids used. It has met the criteria of effectiveness, with the results: (1) student activities have met the predetermined tolerance limits, (2) the teacher activities have fulfilled the observed aspects, and (3) the student learning outcomes on the working engine principle materials have achieved completeness.

The elderly need the assistance of walking aids due to deterioration of their physical functions. However, they are often less willing to use these aids because of their worries about how others may think of them. Not using professional walking aids often makes elderly people fall easily when walking. This study explores the behavioral intention factors of middle-aged people (45–64 years old) and elderly people (65 years and older) that affect the use of walking aids. Based on the Theory of Reasoned Action (TRA), subjective norms, attitude toward usage, behavior intention, safety, and usefulness were combined with social image to establish the research framework. This study used questionnaire surveys both in paper form assisted by volunteers and in online electronic form. A total of 457 questionnaires were collected. Data analysis was carried out in three stages: descriptive analysis, measurement model verification, and structural equation model analysis. The results showed that social image had a significant impact on the attitude toward using walking aids. Factors such as attitude toward usage, subjective norms, and safety of walking aids also had a significant positive impact on behavioral intention. Finally, through the research results, some suggestions are proposed for stakeholders to improve the elderly’s concerns about the social image of using walking aids.